{"id":99,"date":"2023-12-22T13:30:19","date_gmt":"2023-12-22T05:30:19","guid":{"rendered":"http:\/\/140.143.165.40\/?p=99"},"modified":"2023-12-22T14:30:39","modified_gmt":"2023-12-22T06:30:39","slug":"java%e5%9f%ba%e7%a1%80","status":"publish","type":"post","link":"http:\/\/www.sunqizheng1997.com\/index.php\/2023\/12\/22\/java%e5%9f%ba%e7%a1%80\/","title":{"rendered":"Java\u57fa\u7840"},"content":{"rendered":"

\u7b2c\u4e00\u90e8\u5206 Java\u57fa\u7840\u8bed\u6cd5<\/h1>\n

1.1 \u6ce8\u91ca<\/h2>\n

\u6ce8\u91ca\u662f\u89e3\u91ca\u8bf4\u660e\u7a0b\u5e8f\u7684\u95ee\u9898\uff0c\u65b9\u4fbf\u81ea\u5df1\u548c\u522b\u4eba\u9605\u8bfb\u4ee3\u7801<\/p>\n

\u5206\u7c7b\uff1a<\/p>\n

1.\u5355\u884c\u6ce8\u91ca\uff1a\n    \/\/\u540e\u9762\u6839\u89e3\u91ca\u6587\u5b57\n2.\u591a\u884c\u6ce8\u91ca\n    \/*\n    \u8fd9\u91cc\u5199\u6ce8\u91ca\u6587\u5b57\n    \u53ef\u4ee5\u5199\u591a\u884c\n    *\/\n3.\u6587\u6863\u6ce8\u91ca\n    \/**\n    \u8fd9\u91cc\u5199\u6587\u6863\u6ce8\u91ca\n    \u4e5f\u53ef\u4ee5\u5199\u591a\u884c\uff0c\u6587\u6863\u6ce8\u91ca\u53ef\u4ee5\u5229\u7528JDK\u7684\u5de5\u5177\u751f\u6210\u5e2e\u52a9\u6587\u6863\n    *\/<\/code><\/pre>\n
\u4e3e\u4f8b\uff1a<\/p>\n
\/**\n\u76ee\u6807\uff1a\u5b66\u4f1a\u4f7f\u7528\u6ce8\u91ca\n     \u8fd9\u662f\u7a0b\u5e8f\u7684\u8bb2\u89e3\u6ce8\u91ca\n*\/\npublic class NoteDemo{\n    \/\/\u8fd9\u662f\u7a0b\u5e8f\u7684\u4e3b\u65b9\u6cd5\uff0c\u662f\u7a0b\u5e8f\u7684\u5165\u53e3\n    public static void main(String[] args){\n        System.out.println("\u6211\u5f00\u59cb\u5b66\u4e60Java\u7a0b\u5e8f\uff0c\u597d\u55e8\u76ae~~");\n        \/*\n        \u7a97\u524d\u660e\u6708\u5149\n        \u7591\u662f\u5730\u4e0a\u971c\n        \u4e3e\u5934\u671b\u660e\u6708\n        \u4f4e\u5934\u601d\u6545\u4e61\n        *\/\n        System.out.println("\u64ad\u4ed4");\n        System.out.println("deli");\n    }\n}<\/code><\/pre>\n
\u5feb\u6377\u952e<\/p>\n
Ctrl + \/    \u5355\u884c\u6ce8\u91ca\uff08\u5bf9\u5f53\u524d\u884c\u8fdb\u884c\u6ce8\u91ca\uff09\nCtrl + Shift + \/    \u5bf9\u9009\u4e2d\u7684\u4ee3\u7801\u8fdb\u884c\u591a\u884c\u6ce8\u91ca\u3002<\/code><\/pre>\n
1.2 \u5b57\u9762\u91cf<\/h2>\n
\"image-20231115151312354\"<\/div><\/p>\n
\u4e3e\u4f8b\uff1a<\/p>\n
\/*\n\u76ee\u6807\uff1a\u9700\u8981\u540c\u5b66\u4eec\u638c\u63e1\u5e38\u89c1\u6570\u636e\u5728\u7a0b\u5e8f\u4e2d\u7684\u4e66\u5199\u683c\u5f0f\n*\/\npublic class LiteralDemo{\n    public static void main(String[] args){\n        \/\/1.\u6574\u6570\n        System.out.println(666);\n        \/\/2.\u5c0f\u6570\n        System.out.println(3.66);\n        \/\/3.\u5b57\u7b26: \u5b57\u7b26\u5fc5\u987b\u7528\u5355\u5f15\u53f7\u5f15\u8d77\u6765\n        System.out.println('a');\n        System.out.println('0');\n        System.out.println('\u4e2d');\n        System.out.println(' '); \/\/\u7a7a\u683c\u4e5f\u7b97\u5b57\u7b26\n        \/\/\u7279\u6b8a\u5b57\u7b26\uff1a\\t\u8868\u793a\u5236\u8868\u7b26 \\n\u8868\u793a\u6362\u884c\n        System.out.println('\\t'); \/\/\u8fd9\u76f8\u5f53\u4e8e\u4e00\u4e2atab\u952e\uff0c\u4e13\u4e1a\u53eb\u505a\u5236\u8868\u7b26\n        System.out.println('\\n'); \/\/\u8fd9\u662f\u6362\u884c\u7684\u610f\u601d\n        \/\/4.\u5b57\u7b26\u4e32\uff1a\u5b57\u7b26\u4e32\u662f\u53cc\u5f15\u53f7\u5f15\u8d77\u6765\u7684\n        System.out.println("\u6211\u7231\u4f60\u4e2d\u56fdabc");\n        \/\/5.\u5e03\u5c14\u503c\uff1a\u53ea\u6709\u4e24\u4e2a\u503ctrue\u548cfalse\n        System.out.println(true);\n        System.out.println(false);\n    }\n}<\/code><\/pre>\n
1.3 \u53d8\u91cf<\/h2>\n
\u4ec0\u4e48\u662f\u53d8\u91cf\uff1a\u53d8\u91cf\u662f\u7528\u6765\u8bb0\u5f55\u7a0b\u5e8f\u4e2d\u7684\u6570\u636e\u7684\u3002\u5176\u672c\u8d28\u4e0a\u662f\u5185\u5b58\u4e2d\u7684\u4e00\u5757\u533a\u57df<\/p>\n
\"image-20231115151455158\"<\/div><\/p>\n
int age = 18;\nSystem.out.println(a);<\/code><\/pre>\n
\u4e3a\u4ec0\u4e48\u7528\u53d8\u91cf\uff1a\u4f7f\u7528\u53d8\u91cf\u6765\u8bb0\u5f55\u6570\u636e\uff0c\u5bf9\u4e8e\u6570\u636e\u7684\u7ba1\u7406\u66f4\u4e3a\u7075\u6d3b<\/p>\n
\u5e94\u7528\u573a\u666f\uff1a\u53ea\u8981\u662f\u7a0b\u5e8f\u4e2d\u80fd\u53d1\u751f\u53d8\u5316\u7684\u6570\u636e\uff0c\u90fd\u53ef\u4ee5\u7528\u53d8\u91cf\u5b58\u50a8<\/p>\n
\u6ce8\u610f\u4e8b\u9879\uff1a<\/p>\n
1.\u53d8\u91cf\u5b9a\u4e49\u5728\u54ea\u4e2a{}\u8303\u56f4\u5185\uff0c\u5c31\u53ea\u5728\u54ea\u4e2a\u5927\u62ec\u53f7\u5185\u6709\u6548\u3002\u53d8\u91cf\u7684\u6709\u6548\u8303\u56f4\u79f0\u4e4b\u4e3a\u53d8\u91cf\u7684\u4f5c\u7528\u57df\n    {\n        int a = 10;\n        System.out.println(a); \/\/\u8fd9\u662f\u662f\u5bf9\u7684\n    }\n    System.out.println(a); \/\/\u8fd9\u91cc\u4f1a\u51fa\u9519\n2.\u5728\u540c\u4e00\u4e2a\u4f5c\u7528\u57df\u5185\uff0c\u4e0d\u80fd\u6709\u4e24\u4e2a\u540c\u540d\u7684\u53d8\u91cf\n    {\n        int a = 10;\n        int a = 20; \/\/\u8fd9\u91cc\u4f1a\u51fa\u9519\n    }\n3.\u53d8\u91cf\u6ca1\u6709\u521d\u59cb\u5316\u53ea\uff0c\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\n    int a; \/\/\u4ec5\u4ec5\u5b9a\u4e49\u4e86\u53d8\u91cf\uff0c\u4f46\u662f\u6ca1\u6709\u521d\u59cb\u503c\n    System.out.println(a); \/\/\u8fd9\u91cc\u4f1a\u51fa\u9519\n4.\u53d8\u91cf\u53ef\u4ee5\u5b9a\u4e49\u5728\u540c\u4e00\u884c\n    \u5982\uff1aint a=10, b=20; \/\/a\u548cb\u90fd\u662fint\u7c7b\u578b<\/code><\/pre>\n
1.4 \u5173\u952e\u5b57<\/h2>\n
\u5b9a\u4e49\uff1a\u5173\u952e\u5b57\u662fjava\u8bed\u8a00\u4e2d\u6709\u7279\u6b8a\u542b\u4e49\u7684\u5355\u8bcd\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
abstract<\/strong><\/th>\nassert<\/strong><\/th>\nboolean<\/strong><\/th>\nbreak<\/strong><\/th>\nbyte<\/strong><\/th>\n<\/tr>\n<\/thead>\n
case<\/strong><\/td>\ncatch<\/strong><\/td>\nchar<\/strong><\/td>\nclass<\/strong><\/td>\nconst<\/strong><\/td>\n<\/tr>\n
continue<\/strong><\/td>\ndefault<\/strong><\/td>\ndo<\/strong><\/td>\ndouble<\/strong><\/td>\nelse<\/strong><\/td>\n<\/tr>\n
enum<\/strong><\/td>\nextends<\/strong><\/td>\nfinal<\/strong><\/td>\nfinally<\/strong><\/td>\nfloat<\/strong><\/td>\n<\/tr>\n
for<\/strong><\/td>\ngoto<\/strong><\/td>\nif<\/strong><\/td>\nimplements<\/strong><\/td>\nimport<\/strong><\/td>\n<\/tr>\n
instanceof<\/strong><\/td>\nint<\/strong><\/td>\ninterface<\/strong><\/td>\nlong<\/strong><\/td>\nnative<\/strong><\/td>\n<\/tr>\n
new<\/strong><\/td>\npackage<\/strong><\/td>\nprivate<\/strong><\/td>\nprotected<\/strong><\/td>\npublic<\/strong><\/td>\n<\/tr>\n
return<\/strong><\/td>\nstrictfp<\/strong><\/td>\nshort<\/strong><\/td>\nstatic<\/strong><\/td>\nsuper<\/strong><\/td>\n<\/tr>\n
switch<\/strong><\/td>\nsynchronized<\/strong><\/td>\nthis<\/strong><\/td>\nthrow<\/strong><\/td>\nthrows<\/strong><\/td>\n<\/tr>\n
transient<\/strong><\/td>\ntry<\/strong><\/td>\nvoid<\/strong><\/td>\nvolatile<\/strong><\/td>\nwhile<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
1.5 \u6807\u5fd7\u7b26<\/h2>\n
\u5f3a\u5236\u8981\u6c42\uff1a\u5fc5\u987b\u9075\u5b88\uff0c\u4e0d\u9075\u5b88\u5c31\u4f1a\u62a5\u9519\n    1.\u6700\u597d\u662f\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u4e0b\u5212\u7ebf\u3001$\u7ec4\u6210\n    2.\u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934\n    3.\u4e0d\u80fd\u662fJava\u7684\u5173\u952e\u5b57\n\u5efa\u8bae\u9075\u5b88\uff1a\u6309\u7167\u4e0b\u9762\u7684\u65b9\u5f0f\u53d6\u540d\u5b57\u4f1a\u663e\u5f97\u66f4\u52a0\u4e13\u4e1a\n    1.\u6240\u6709\u7684\u540d\u5b57\u8981\u89c1\u540d\u77e5\u610f\uff0c\u4fbf\u4e8e\u81ea\u5df1\u548c\u522b\u4eba\u9605\u8bfb\n        \u4e3e\u4f8b\uff1a class Student{} \/\/\u4e00\u770b\u8fd9\u4e2a\u7c7b\u5c31\u77e5\u9053\u8868\u793a\u4e00\u4e2a\u5b66\u751f\n              int age =10;    \/\/\u4e00\u770b\u8fd9\u4e2a\u53d8\u91cf\u5c31\u77e5\u9053\u8868\u793a\u5e74\u9f84\n2.\u7c7b\u540d\uff1a\u9996\u5b57\u6bcd\u5927\u5199\uff08\u5927\u9a7c\u5cf0\u547d\u540d\uff09\n    \u4e3e\u4f8b\uff1a class Student{}\n3.\u53d8\u91cf\u540d\uff1a\u7b2c\u4e8c\u4e2a\u5355\u8bcd\u5f00\u59cb\u9996\u5b57\u6bcd\u5927\u5199\uff08\u5c0f\u9a7c\u5cf0\u547d\u540d\uff09\n    \u4e3e\u4f8b\uff1a double money = 6.88;  \n          double applePrice = 7.5; <\/code><\/pre>\n
\u7b2c\u4e8c\u90e8\u5206 \u6570\u636e\u7c7b\u578b\uff0c\u8fd0\u7b97\u7b26<\/h1>\n
\u4e00\u3001\u6570\u636e\u7684\u8868\u793a\u8be6\u89e3<\/h2>\n
1.1 \u6574\u6570\u5728\u8ba1\u7b97\u673a\u4e2d\u5b58\u50a8<\/h3>\n
\u4efb\u4f55\u6570\u636e\u5728\u8ba1\u7b97\u673a\u4e2d\u90fd\u662f\u4ee5\u4e8c\u8fdb\u5236<\/strong>\u8868\u793a\u7684<\/p>\n
\u8ba1\u7b97\u673a\u7684\u6700\u5c0f\u5b58\u50a8\u5355\u4f4d<\/strong>\uff1a\u8ba1\u7b97\u673a\u4e2d\u6700\u5c0f\u7684\u5b58\u50a8\u5355\u4f4d\u662f\u5b57\u8282\uff08Byte\uff09\uff0c\u4e00\u4e2a\u5b57\u8282\u53608\u4f4d\uff08bit\uff09<\/strong>\uff0c\u4e5f\u5c31\u662f\u8bf4\u5373\u4f7f\u8fd9\u4e2a\u6570\u636e\u4e0d\u8db38\u4f4d\u4e5f\u9700\u8981\u75288\u4f4d\u6765\u5b58\u50a8<\/p>\n
1.2 \u5b57\u7b26\u5728\u8ba1\u7b97\u673a\u4e2d\u5b58\u50a8<\/h3>\n
\u628a\u6bcf\u4e00\u4e2a\u5b57\u7b26\u7f16\u4e3a\u4e00\u4e2a\u6574\u6570\uff0c\u5b58\u50a8\u7684\u662f\u5b57\u7b26\u5bf9\u5e94\u6574\u6570\u7684\u4e8c\u8fdb\u5236\u5f62\u5f0f\uff0c\u4e00\u5957\u5b57\u7b26\u548c\u6574\u6570\u7684\u5bf9\u5e94\u5173\u7cfb\u8868\uff0c\u53eb\u505aASCII\u7f16\u7801\u8868<\/p>\n
ASCII\u7f16\u7801\u8868\u4e2d\u5b57\u7b26\u7f16\u7801\u7684\u89c4\u5f8b\uff1a\n    1.\u5b57\u7b260\u5bf9\u5e9448\uff0c\u540e\u9762\u76841,2,3,4...9 \u5bf9\u5e94\u7684\u5341\u8fdb\u5236\u6574\u6570\u4f9d\u6b21\u5f80\u540e\u987a\u5ef6\n    2.\u5b57\u7b26a\u5bf9\u5e9497\uff0c\u540e\u9762\u7684b,c,d,e...z \u5bf9\u5e94\u7684\u5341\u8fdb\u5236\u6574\u6570\u4f9d\u6b21\u5f80\u540e\u987a\u5ef6\n    3.\u5b57\u7b26A\u5bf9\u5e9465\uff0c\u540e\u9762\u7684B,C,D,E...Z \u5bf9\u5e94\u7684\u5341\u8fdb\u5236\u6574\u6570\u4f9d\u6b21\u5f80\u540e\u987a\u5ef6<\/code><\/pre>\n
1.3 \u56fe\u7247\u89c6\u9891\u5728\u8ba1\u7b97\u673a\u4e2d\u5b58\u50a8<\/h3>\n
\u4efb\u4f55\u4e00\u79cd\u989c\u8272\u53ef\u4ee5\u4f7f\u7528\u4e09\u539f\u8272\u6765\u8868\u793a\uff0c\u7b80\u79f0RGB\uff0c\u5176\u4e2dR\uff08\u7ea2\u8272\uff09\uff0cG\uff08\u7eff\u8272\uff09\uff0cB\uff08\u84dd\u8272\uff09\uff0c\u800cRGB\u4e2d\u6bcf\u4e00\u79cd\u989c\u8272\u53c8\u7528\u4e00\u4e2a\u5b57\u8282\u7684\u6574\u6570\u6765\u8868\u793a\uff0c\u6700\u5c0f\u503c\u662f0\u6700\u5927\u503c\u662f255<\/p>\n
RGB\uff080,0,0\uff09\u8868\u793a\u9ed1\u8272\nRGB\uff08255,255,255\uff09\u8868\u793a\u767d\u8272\nRGB\uff08255,0,0\uff09 \u8868\u793a\u7ea2\u8272\nRGB\uff08255,255,0\uff09 \u8868\u793a\u7ea2\u8272\u548c\u7eff\u8272\u6df7\u5408\u4e3a\u9ec4\u8272\nRGB\uff08255,0,255\uff09 \u8868\u793a\u7ea2\u8272\u548c\u84dd\u8272\u6df7\u5408\u4e3a\u7d2b\u8272<\/code><\/pre>\n
\u89c6\u9891\uff1a\u89c6\u9891\u548c\u56fe\u7247\u662f\u4e00\u6837\u7684\uff0c\u628a\u591a\u5f20\u56fe\u7247\u8fde\u7eed\u64ad\u653e<\/p>\n
\u58f0\u97f3\uff1a\u628a\u58f0\u6ce2\u5728\u8868\u793a\u5728\u4e00\u4e2a\u5750\u6807\u7cfb\u4e0a\uff0c\u7136\u540e\u5728\u5750\u6807\u7cfb\u4e0a\u53d6\u4e00\u4e9b\u70b9\uff0c\u628a\u8fd9\u4e9b\u70b9\u7684\u5750\u6807\u503c\u4ee5\u4e8c\u8fdb\u5236\u7684\u5f62\u5f0f\u5b58\u50a8\u5230\u8ba1\u7b97\u673a\u4e2d<\/p>\n
1.4 \u6570\u636e\u7684\u5176\u4ed6\u8868\u73b0\u5f62\u5f0f<\/h3>\n
\u4e8c\u8fdb\u5236\u8f6c\u5341\u8fdb\u5236\uff0c\u516b\u8fdb\u5236\uff0c\u5341\u516d\u8fdb\u5236<\/p>\n
System.out.pirntln('a'+1); \/\/98\nSystem.out.pirntln(0b01100001); \/\/97\nSystem.out.pirntln(0141); \/\/97\nSystem.out.pirntln(0x61); \/\/97<\/code><\/pre>\n
\u4e8c\u3001\u6570\u636e\u7c7b\u578b\u8be6\u89e3<\/h2>\n
\u6570\u636e\u7c7b\u578b\u662f\u7528\u6765\u89c4\u5b9a\u53d8\u91cf\u5b58\u50a8\u4ec0\u4e48\u7c7b\u578b\u7684\u6570\u636e<\/strong><\/p>\n
\u6570\u636e\u7c7b\u578b\u6574\u4f53\u4e0a\u6765\u8bf4\u5206\u4e3a\u4e24\u5927\u7c7b\uff1a \u57fa\u672c\u6570\u636e\u7c7b\u578b<\/strong>\u3001\u5f15\u7528\u6570\u636e\u7c7b\u578b<\/strong><\/p>\n
\"image-20231115153711929\"<\/div><\/p>\n
\u4e3e\u4f8b\uff1a<\/p>\n
public class TypeDemo1 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u638c\u63e18\u79cd\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff0c\u7528\u6765\u5b9a\u4e49\u53d8\u91cf\u3002\n        \/\/ 1\u3001\u6574\u578b\n        byte number = 98;\n        System.out.println(number);\n        short number2 = 9000;\n        int number3 = 12323232; \/\/ \u9ed8\u8ba4\n        \/\/ \u6ce8\u610f\uff1a\u968f\u4fbf\u5199\u4e00\u4e2a\u6574\u578b\u5b57\u9762\u91cf\uff0c\u9ed8\u8ba4\u662fint\u7c7b\u578b\u7684\uff0c73642422442424\u867d\u7136\u6ca1\u6709\u8d85\u8fc7long\u7684\u8303\u56f4\uff0c\u4f46\u662f\u5b83\u8d85\u8fc7\u4e86\u672c\u8eabint\u7684\u8303\u56f4\u4e86\u3002\n        \/\/ \u5982\u679c\u5e0c\u671b\u968f\u4fbf\u5199\u4e00\u4e2a\u6574\u578b\u5b57\u9762\u91cf\u662flong\u7c7b\u578b\u7684\uff0c\u9700\u8981\u5728\u5176\u540e\u9762\u52a0\u4e0aL\/l\n        long number4 = 73642422442424L;\n        \/\/ 2\u3001\u6d6e\u70b9\u578b\n        \/\/\u6ce8\u610f:\n        \/\/\u968f\u4fbf\u5199\u4e00\u4e2a\u5c0f\u6570\u5b57\u9762\u91cf\uff0c\u9ed8\u8ba4\u5f53\u6210double\u7c7b\u578b\u5bf9\u5f85\u7684\uff0c\n        \/\/\u5982\u679c\u5e0c\u671b\u8fd9\u4e2a\u5c0f\u6570\u662ffloat\u7c7b\u578b\u7684\uff0c\u9700\u8981\u5728\u540e\u9762\u52a0\u4e0a\uff1aF\/f\n        float score1 = 99.5F;\n        double score2 = 99.8; \/\/ \u9ed8\u8ba4\u5b9a\u4e49\u65b9\u6848\u3002\n        \/\/ 3\u3001\u5b57\u7b26\u578b\n        char ch1 = 'a';\n        char ch2 = '\u4e2d';\n        char ch3 = '\u56fd';\n        \/\/ 4\u3001\u5e03\u5c14\u578b\n        boolean b1 = true;\n        boolean b2 = false;\n        \/\/ \u5f15\u7528\u6570\u636e\u7c7b\u578b\uff1aString.\n        \/\/ String\u4ee3\u8868\u7684\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u5b9a\u4e49\u7684\u53d8\u91cf\u53ef\u4ee5\u7528\u6765\u8bb0\u4f4f\u5b57\u7b26\u4e32\u3002\n        String name = "\u9ed1\u9a6c";\n        System.out.println(name);\n    }\n}<\/code><\/pre>\n
\u4e09\u3001\u6570\u636e\u7c7b\u578b\u8f6c\u6362<\/h2>\n
3.1 \u81ea\u52a8\u7c7b\u578b\u8f6c\u6362<\/h3>\n
\u6570\u636e\u8303\u56f4\u5c0f\u7684\u53d8\u91cf\u53ef\u4ee5\u76f4\u63a5\u8d4b\u503c\u7ed9\u6570\u636e\u8303\u56f4\u5927\u7684\u53d8\u91cf<\/p>\n
byte a = 12; \n    int b = a; \/\/\u8fd9\u91cc\u5c31\u53d1\u751f\u4e86\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362(\u628abyte\u7c7b\u578b\u8f6c\u6362int\u7c7b\u578b)<\/code><\/pre>\n
\u539f\u7406\uff1a\u5728\u8f83\u5c0f\u6570\u636e\u7c7b\u578b\u6570\u636e\u524d\u9762\uff0c\u8865\u4e86\u82e5\u5e72\u4e2a\u5b57\u8282<\/p>\n
\"image-20231115153916659\"<\/div><\/p>\n
\u8f6c\u6362\u987a\u5e8f\uff1a<\/p>\n
\"image-20231115153938006\"<\/div><\/p>\n
\u4e3e\u4f8b\uff1a<\/p>\n
public class TypeConversionDemo1 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u7406\u89e3\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\u673a\u5236\u3002\n        byte a = 12;\n        int b = a; \/\/ \u53d1\u751f\u4e86\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\u4e86\n        System.out.println(a);\n        System.out.println(b);\n\n        int c = 100; \/\/ 4\n        double d = c;\/\/ 8 \u53d1\u751f\u4e86\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\u4e86\n        System.out.println(d);\n\n        char ch = 'a'; \/\/ 'a' 97 => 00000000 01100001\n        int i = ch; \/\/ \u53d1\u751f\u4e86\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\u4e86 =>  00000000 00000000  00000000 01100001\n        System.out.println(i);\n    }\n}<\/code><\/pre>\n
\u8868\u8fbe\u5f0f\u7684\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\uff1a<\/p>\n
\u591a\u79cd\u6570\u636e\u7c7b\u578b\u53c2\u4e0e\u8fd0\u7b97\uff0c\u5176\u7ed3\u679c\u4ee5\u5927\u7684\u6570\u636e\u7c7b\u578b\u4e3a\u51c6<\/p>\n
byte,short,char \u4e09\u79cd\u7c7b\u578b\u6570\u636e\u5728\u548c\u5176\u4ed6\u7c7b\u578b\u6570\u636e\u8fd0\u7b97\u65f6\uff0c\u90fd\u4f1a\u8f6c\u6362\u4e3aint\u7c7b\u578b\u518d\u8fd0\u7b97<\/p>\n
public class TypeConversionDemo2 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u638c\u63e1\u8868\u8fbe\u5f0f\u7684\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\u673a\u5236\u3002\n        byte a = 10;\n        int b = 20;\n        long c = 30;\n        long rs = a + b + c;\n        System.out.println(rs);\n        double rs2 = a + b + 1.0;\n        System.out.println(rs2);\n        byte i = 10;\n        short j = 30;\n        int rs3 = i + j;\n        System.out.println(rs3);\n        \/\/ \u9762\u8bd5\u7b14\u8bd5\u9898\uff1a \u5373\u4f7f\u4e24\u4e2abyte\u8fd0\u7b97\uff0c\u7ed3\u679c\u4e5f\u4f1a\u63d0\u5347\u4e3aint\n        byte b1 = 110;\n        byte b2 = 80;\n        int b3 = b1 + b2;\n        System.out.println(b3);\n    }\n}<\/code><\/pre>\n
3.2 \u5f3a\u5236\u7c7b\u578b\u8f6c\u6362<\/h3>\n
\u683c\u5f0f\uff1a<\/p>\n
\u76ee\u6807\u6570\u636e\u7c7b\u578b  \u53d8\u91cf\u540d  =  (\u76ee\u6807\u6570\u636e\u7c7b\u578b)\u88ab\u8f6c\u6362\u7684\u6570\u636e;<\/code><\/pre>\n
\u4e3e\u4f8b\uff1a<\/p>\n
public class TypeConversionDemo3 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u638c\u63e1\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u3002\n        int a = 20;\n        byte b = (byte) a;  \/\/ ALT + ENTER \u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u3002\n        System.out.println(a);\n        System.out.println(b);\n        int i = 1500;\n        byte j = (byte) i;\n        System.out.println(j);   \n        double d = 99.5;\n        int m = (int) d; \/\/ \u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\n        System.out.println(m); \/\/ \u4e22\u6389\u5c0f\u6570\u90e8\u5206\uff0c\u4fdd\u7559\u6574\u6570\u90e8\u5206\n    }\n}<\/code><\/pre>\n
\u539f\u7406\uff1a\u5f3a\u884c\u628a\u524d\u9762\u51e0\u4e2a\u5b57\u8282\u780d\u6389\uff0c\u4f46\u662f\u6709\u6570\u636e\u4e22\u5931\u7684\u98ce\u9669<\/strong><\/p>\n
\"image-20231115155044317\"<\/div><\/p>\n
\u56db\u3001\u8fd0\u7b97\u7b26<\/h2>\n
4.1 \u7b97\u672f\u8fd0\u7b97\u7b26<\/h3>\n
\/: \u4e24\u4e2a\u6574\u6570\u76f8\u9664\uff0c\u7ed3\u679c\u4e5f\u662f\u4e00\u4e2a\u6574\u6570\n%: \u8868\u793a\u4e24\u4e2a\u6570\u76f8\u9664\uff0c\u53d6\u4f59\u6570<\/code><\/pre>\n
public class OperatorDemo1 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u638c\u63e1\u57fa\u672c\u7684\u7b97\u672f\u8fd0\u7b97\u7b26\u7684\u4f7f\u7528\u3002\n        int a = 10;\n        int b = 2;\n        System.out.println(a + b);\n        System.out.println(a - b);\n        System.out.println(a * b); \/\/ 20\n        System.out.println(a \/ b); \/\/ 5\n        System.out.println(5 \/ 2); \/\/ 2.5 ==> 2\n        System.out.println(5.0 \/ 2); \/\/ 2.5\n        int i = 5;\n        int j = 2;\n        System.out.println(1.0 * i \/ j); \/\/ 2.5\n        System.out.println(a % b); \/\/ 0\n        System.out.println(3 % 2); \/\/ 1\n        System.out.println("---------------------------------------");\n        \/\/ \u76ee\u68072\uff1a\u638c\u63e1\u4f7f\u7528+\u7b26\u53f7\u505a\u8fde\u63a5\u7b26\u7684\u60c5\u51b5\u3002\n        int a2 = 5;\n        System.out.println("abc" + a2); \/\/ "abc5"\n        System.out.println(a2 + 5); \/\/  10\n        System.out.println("itheima" + a2 + 'a'); \/\/ "itheima5a"\n        System.out.println(a2 + 'a' + "itheima"); \/\/ 102itheima\n    }\n}<\/code><\/pre>\n
4.2 \u81ea\u589e\u81ea\u51cf\u8fd0\u7b97\u7b26<\/h3>\n
++<\/code>\u8bfb\u4f5c\u81ea\u589e\uff0c--<\/code>\u8bfb\u4f5c\u81ea\u51cf<\/p>\n
\"image-20231115155758328\"<\/div><\/p>\n
\u81ea\u589e\u81ea\u51cf\u53ea\u80fd\u5bf9\u53d8\u91cf\u8fdb\u884c\u64cd\u4f5c\uff0c\u4e0d\u80fd\u64cd\u4f5c\u5b57\u9762\u91cf<\/p>\n
\u4e3e\u4f8b\uff1a<\/p>\n
1.\u5355\u72ec\u4f7f\u7528\uff1a++\u6216\u8005--\u653e\u5728\u53d8\u91cf\u524d\u9762\u6ca1\u6709\u533a\u522b\n       int a =10; \n        a++;  \/\/11\n        --a;  \/\/10\n        System.out.println(a); \/\/10\n2.\u6df7\u5408\u4f7f\u7528\uff1a++\u6216\u8005--\u653e\u5728\u53d8\u91cf\u6216\u8005\u524d\u9762\u8fd0\u7b97\u89c4\u5219\u7a0d\u6709\u4e0d\u901a\u8fc7\n    \/\/++\u5728\u540e\uff1a\u5148\u505a\u5176\u4ed6\u4e8b\u60c5\uff0c\u518d\u505a\u81ea\u589e\u548c\u81ea\u51cf\n    int a = 10;\n    int b = a++; \/\/\u7b49\u4ef7\u4e8e int b = a; a++; \n\/\/++\u5728\u524d\uff1a\u5148\u81ea\u589e\u6216\u8005\u81ea\u51cf\uff0c\u518d\u505a\u5176\u4ed6\u8fd0\u8f93\nint x = 10;\nint y = --x; \/\/\u7b49\u4ef7\u4e8ex--; int y = x;<\/code><\/pre>\n
\u4e3e\u4f8b\uff1a<\/p>\n
public class OperatorDemo2 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u638c\u63e1\u81ea\u589e\u81ea\u51cf\u8fd0\u7b97\u7b26\u7684\u4f7f\u7528\u3002\n        int a = 10;\n        \/\/ a++; \/\/ a = a + 1\n        ++a;\n        System.out.println(a);\n        \/\/ a--; \/\/ a = a - 1\n        --a;\n        System.out.println(a);\n        \/\/ \u81ea\u589e\u81ea\u51cf\u53ea\u80fd\u64cd\u4f5c\u53d8\u91cf\u4e0d\u80fd\u64cd\u4f5c\u5b57\u9762\u91cf\u7684\uff0c\u4f1a\u62a5\u9519\uff01\n        \/\/System.out.println(2++);\n        System.out.println("--------------------------------------");\n        int i = 10;\n        int rs = ++i; \/\/ \u5148\u52a0\u540e\u7528\n        System.out.println(rs);\n        System.out.println(i);\n        int j = 10;\n        int rs2 = j++; \/\/ \u5148\u7528\u540e\u52a0\n        System.out.println(rs2);\n        System.out.println(j);\n    }\n}<\/code><\/pre>\n
3.3 \u8d4b\u503c\u8fd0\u7b97\u7b26<\/h3>\n
\"image-20231115160643141\"<\/div><\/p>\n
\u4e3e\u4f8b\uff1a<\/p>\n
int a = 10;\n\/\/+=\u89e3\u6790\uff1a\u5728a\u539f\u6765\u8bb0\u5f55\u503c10\u7684\u57fa\u7840\u4e0a\u7d2f\u52a05\uff0c\u5c06\u7ed3\u679c\u91cd\u65b0\u8d4b\u503c\u7ed9a; \na+=5; \n\/\/\u6700\u7ec8\u6253\u5370a\u7684\u503c\u4e3a15\nSystem.out.println(a); <\/code><\/pre>\n
\u4e3e\u4f8b\uff1a<\/p>\n
public class OperatorDemo3 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u638c\u63e1\u6269\u5c55\u8d4b\u503c\u8fd0\u7b97\u7b26\u7684\u4f7f\u7528\u3002\n        \/\/ +=\n        \/\/ \u9700\u6c42\uff1a\u6536\u7ea2\u5305\n        double a = 9.5;\n        double b = 520;\n        a += b;  \/\/ a = (double)(a + b);\n        System.out.println(a);\n        \/\/ -= \u9700\u6c42\uff1a\u53d1\u7ea2\u5305\n        double i = 600;\n        double j = 520;\n        i -= j;  \/\/ i = (double)(i - j);\n        System.out.println(i); \n        int m = 10;\n        int n = 5;\n        \/\/ m *= n; \/\/ \u7b49\u4ef7\u5f62\u5f0f\uff1a m = (int)(m * n)\n        \/\/ m \/= n; \/\/ \u7b49\u4ef7\u5f62\u5f0f\uff1a m = (int)(m \/ n)\n        m %= n;    \/\/ \u7b49\u4ef7\u5f62\u5f0f\uff1a m = (int)(m % n)\n        System.out.println(m);\n    }\n}<\/code><\/pre>\n
4.4 \u5173\u7cfb\u8fd0\u7b97\u7b26<\/h3>\n
\"image-20231115161237832\"<\/div><\/p>\n
\u4e3e\u4f8b\uff1a<\/p>\n
public class OperatorDemo4 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u638c\u63e1\u5173\u7cfb\u8fd0\u7b97\u7b26\u7684\u57fa\u672c\u4f7f\u7528\u3002\n        int a = 10;\n        int b = 5;\n        boolean rs = a > b;\n        System.out.println(rs);\n        System.out.println(a >= b); \/\/ \u8981\u4e48a\u5927\u4e8eb,\u6216\u8005a\u7b49\u4e8eb\n        System.out.println(2 >= 2); \/\/ true\n        System.out.println(a < b);\n        System.out.println(a <= b); \/\/ false\n        System.out.println(2 <= 2); \/\/ true\n        System.out.println(a == b); \/\/ false\n        System.out.println(5 == 5); \/\/ true  \n        \/\/ \u6ce8\u610f\u4e86\uff1a\u5224\u65ad\u662f\u5426\u76f8\u7b49\u4e00\u5b9a\u662f\u7528 == \uff0c=\u662f\u7528\u6765\u8d4b\u503c\u7684\u3002\n        \/\/ System.out.println(a = b); \n        System.out.println(a != b); \/\/ true\n        System.out.println(10 != 10); \/\/ false  \n        System.out.println(false ^ true ^ false);\n    }\n}<\/code><\/pre>\n
4.5 \u903b\u8f91\u8fd0\u7b97\u7b26<\/h3>\n
\u903b\u8f91\u8fd0\u7b97\u7b26\u662f\u7528\u6765\u5c06\u591a\u4e2a\u6761\u4ef6\u653e\u5728\u4e00\u8d77\u8fd0\u7b97\uff0c\u6700\u7ec8\u7ed3\u679c\u662ftrue\u6216\u8005false<\/p>\n
\"image-20231115161345439\"<\/div><\/p>\n
4.6 \u4e09\u5143\u8fd0\u7b97\u7b26<\/h3>\n
\u683c\u5f0f\uff1a<\/p>\n
\u5173\u7cfb\u8868\u8fbe\u5f0f? \u503c1 : \u503c2;<\/code><\/pre>\n
\u4e3e\u4f8b\uff1a<\/p>\n
public class OperatorDemo6 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u638c\u63e1\u4e09\u5143\u8fd0\u7b97\u7b26\u7684\u57fa\u672c\u4f7f\u7528\u3002\n        double score = 58.5;\n        String rs = score >= 60 ? "\u6210\u7ee9\u53ca\u683c" : "\u6210\u7ee9\u4e0d\u53ca\u683c";\n        System.out.println(rs);\n        \/\/ \u9700\u6c422\uff1a\u627e\u51fa2\u4e2a\u6574\u6570\u4e2d\u7684\u8f83\u5927\u503c\uff0c\u5e76\u8f93\u51fa\u3002\n        int a = 99;\n        int b = 69;\n        int max = a > b ? a : b;\n        System.out.println(max); \n        \/\/ \u9700\u6c423\uff1a\u627e3\u4e2a\u6574\u6570\u4e2d\u7684\u8f83\u5927\u503c\u3002\n        int i = 10;\n        int j = 45;\n        int k = 34; \n        \/\/ \u627e\u51fa2\u4e2a\u6574\u6570\u4e2d\u7684\u8f83\u5927\u503c\u3002\n        int temp = i > j ? i : j;\n        \/\/ \u627e\u51fatemp\u4e0ek\u4e2d\u7684\u8f83\u5927\u503c\u3002\n        int max2 = temp > k ? temp : k;\n        System.out.println(max2);\n    }\n}<\/code><\/pre>\n
4.7 \u8fd0\u7b97\u4f18\u5148\u7ea7<\/h3>\n
\"image-20231115161604690\"<\/div><\/p>\n
\u4e94\u3001\u83b7\u53d6\u7528\u6237\u952e\u76d8\u8f93\u5165\u5206\u6570\u636e<\/h2>\n
public class ScannerDemo1 {\n    public static void main(String[] args) {\n        \/\/ 1\u3001\u5bfc\u5305:\u4e00\u822c\u4e0d\u9700\u8981\u6211\u4eec\u81ea\u5df1\u505a\uff0cidea\u5de5\u5177\u4f1a\u81ea\u52a8\u5e2e\u52a9\u6211\u4eec \u5bfc\u5305\u7684\u3002\n        \/\/ 2\u3001\u6284\u5199\u4ee3\u7801\uff1a\u5f97\u5230\u4e00\u4e2a\u952e\u76d8\u626b\u63cf\u5668\u5bf9\u8c61\uff08\u4e1c\u897f\uff09\n        Scanner sc = new Scanner(System.in);\n        \/\/ 3\u3001\u5f00\u59cb \u8c03\u7528sc\u7684\u529f\u80fd\uff0c\u6765\u63a5\u6536\u7528\u6237\u952e\u76d8\u8f93\u5165\u7684\u6570\u636e\u3002\n        System.out.println("\u8bf7\u60a8\u8f93\u5165\u60a8\u7684\u5e74\u9f84\uff1a");\n        int age = sc.nextInt(); \/\/ \u6267\u884c\u5230\u8fd9\u513f\uff0c\u4f1a\u5f00\u59cb\u7b49\u5f85\u7528\u6237\u8f93\u5165\u4e00\u4e2a\u6574\u6570\uff0c\u76f4\u5230\u7528\u6237\u6309\u4e86\u56de\u8f66\u952e\uff0c\u624d\u4f1a\u62ff\u5230\u6570\u636e\u3002\n        System.out.println("\u60a8\u7684\u5e74\u9f84\u662f\uff1a"  + age);\n\n        System.out.println("\u8bf7\u60a8\u8f93\u5165\u60a8\u7684\u540d\u5b57\uff1a");\n        String name = sc.next(); \/\/ \u6267\u884c\u5230\u8fd9\u513f\uff0c\u4f1a\u5f00\u59cb\u7b49\u5f85\u7528\u6237\u8f93\u5165\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u76f4\u5230\u7528\u6237\u6309\u4e86\u56de\u8f66\u952e\uff0c\u624d\u4f1a\u62ff\u5230\u6570\u636e\u3002\n        System.out.println(name + "\u6b22\u8fce\u60a8\u8fdb\u5165\u7cfb\u7edf~~");\n    }\n}<\/code><\/pre>\n
\u7b2c\u4e09\u90e8\u5206 \u7a0b\u5e8f\u6d41\u7a0b\u63a7\u5236<\/h1>\n
\u7a0b\u5e8f\u7684\u6d41\u7a0b\u63a7\u5236\u4e00\u822c\u5206\u4e3a3\u79cd\uff1a\u987a\u5e8f\u7ed3\u6784\u3001\u5206\u652f\u7ed3\u6784\u3001\u5faa\u73af\u7ed3\u6784<\/strong><\/p>\n
    \n
  • \u987a\u5e8f\u7ed3\u6784\uff1a\u5c31\u662f\u4e0d\u52a0\u4efb\u4f55\u63a7\u5236\uff0c\u4ee3\u7801\u4ecemain\u65b9\u6cd5\u5f00\u59cb\u81ea\u4e0a\u800c\u4e0b\u6267\u884c<\/li>\n
  • \u5206\u652f\u7ed3\u6784\uff1a\u5c31\u662f\u6839\u636e\u6761\u4ef6\u5224\u65ad\u662ftrue\u8fd8\u662ffalse\uff0c\u6709\u9009\u62e9\u6027\u7684\u6267\u884c\u54ea\u4e9b\u4ee3\u7801\u3002\u5728Java\u8bed\u8a00\u4e2d\u63d0\u4f9b\u4e86\u4e24\u4e2a\u683c\u5f0fif \u3001 switch<\/li>\n
  • \u5faa\u73af\u7ed3\u6784\uff1a\u5c31\u662f\u63a7\u5236\u67d0\u4e00\u6bb5\u4ee3\u7801\u91cd\u590d\u6267\u884c\u3002\u5728Java\u8bed\u8a00\u4e2d\u63d0\u4f9b\u4e86\u4e09\u79cd\u683c\u5f0f\uff0cfor\u3001while\u3001do-while<\/li>\n<\/ul>\n
    \"image-20231115161835977\"<\/div><\/p>\n
    \u4e00\u3001\u5206\u652f\u7ed3\u6784<\/h2>\n
    1.1 if\u5206\u652f<\/h3>\n
    1. \u573a\u666f<\/h4>\n
    2. \u683c\u5f0f<\/h4>\n
    \"image-20231115162152944\"<\/div><\/p>\n
    3. \u7b2c\u4e00\u79cd\u683c\u5f0f<\/h4>\n
    \/\/ \u9700\u6c42\uff1a\u6d4b\u91cf\u7528\u6237\u4f53\u6e29\uff0c\u53d1\u73b0\u4f53\u6e29\u9ad8\u4e8e37\u5ea6\u5c31\u62a5\u8b66\u3002\ndouble t = 36.9;\nif(t > 37){\n    System.out.println("\u8fd9\u4e2a\u4eba\u7684\u6e29\u5ea6\u5f02\u5e38\uff0c\u628a\u4ed6\u8d76\u7d27\u5e26\u8d70~~");\n}<\/code><\/pre>\n
    4. \u7b2c\u4e8c\u79cd\u683c\u5f0f<\/h4>\n
    \/\/ \u9700\u6c422\uff1a\u53d1\u7ea2\u5305\uff0c\u4f60\u7684\u94b1\u5305\u4f59\u989d\u662f99\u5143\uff0c\u73b0\u5728\u8981\u53d1\u51fa90\u5143\n\/\/ \u5982\u679c\u94b1\u591f\u89e6\u53d1\u53d1\u7ea2\u5305\u7684\u52a8\u4f5c\uff0c\u5982\u679c\u94b1\u4e0d\u591f\uff0c\u5219\u63d0\u793a\uff1a\u4f59\u989d\u4e0d\u8db3\u3002\ndouble money = 19;\nif(money >= 90){\n    System.out.println("\u53d1\u7ea2\u5305\u6210\u529f\u4e86~");\n}else {\n    System.out.println("\u4f59\u989d\u4e0d\u8db3~~");\n}<\/code><\/pre>\n
    5. \u7b2c\u4e09\u79cd\u683c\u5f0f<\/h4>\n
    \/\/ \u9700\u6c423\uff1a\u67d0\u4e2a\u516c\u53f8\u6709\u4e00\u4e2a\u7ee9\u6548\u7cfb\u7edf\uff0c\u6839\u636e\u5458\u5de5\u7684\u6253\u5206\u8f93\u51fa\u5bf9\u5e94\u7684\u7ee9\u6548\u7ea7\u522b\u3002[0,60) D  [60,80) C [80,90) B [90,100] A\nint score = 298;\nif(score >= 0 && score < 60) {\n    System.out.println("\u60a8\u7684\u7ee9\u6548\u7ea7\u522b\u662f\uff1a D");\n}else if(score >= 60 && score < 80){\n    System.out.println("\u60a8\u7684\u7ee9\u6548\u7ea7\u522b\u662f\uff1a C");\n}else if(score >= 80 && score < 90){\n    System.out.println("\u60a8\u7684\u7ee9\u6548\u7ea7\u522b\u662f\uff1a B");\n}else if(score >= 90 && score <= 100){\n    System.out.println("\u60a8\u7684\u7ee9\u6548\u7ea7\u522b\u662f\uff1a A");\n}else {\n    System.out.println("\u60a8\u5f55\u5165\u7684\u5206\u6570\u6709\u6bdb\u75c5~~");\n}<\/code><\/pre>\n
    1.2 switch\u5206\u652f<\/h3>\n
    \u901a\u8fc7\u6bd4\u8f83\u503c\u6765\u51b3\u5b9a\u6267\u884c\u54ea\u6761\u5206\u652f\u4ee3\u7801<\/p>\n
    \"image-20231115162415143\"<\/div><\/p>\n
    String week = "\u5468\u4e09";\nswitch (week){\n    case "\u5468\u4e00":\n        System.out.println("\u57cb\u5934\u82e6\u5e72\uff0c\u89e3\u51b3bug");\n        break;\n    case "\u5468\u4e8c":\n        System.out.println("\u8bf7\u6c42\u5927\u725b\u7a0b\u5e8f\u5458\u5e2e\u5fd9");\n        break;\n    case "\u5468\u4e09":\n        System.out.println("\u4eca\u665a\u5564\u9152\u3001\u9f99\u867e\u3001\u5c0f\u70e7\u70e4");\n        break;\n    case "\u5468\u56db":\n        System.out.println("\u4e3b\u52a8\u5e2e\u52a9\u65b0\u6765\u7684\u5973\u7a0b\u5e8f\u89e3\u51b3bug");\n        break;\n    case "\u5468\u4e94":\n        System.out.println("\u4eca\u665a\u5403\u9e21");\n        break;\n    case "\u5468\u516d":\n        System.out.println("\u4e0e\u738b\u5a46\u4ecb\u7ecd\u7684\u5c0f\u82b3\u76f8\u4eb2");\n        break;\n    case "\u5468\u65e5":\n        System.out.println("\u90c1\u90c1\u5be1\u6b22\u3001\u51c6\u5907\u4e0a\u73ed");\n        break;\n    default:\n        System.out.println("\u60a8\u8f93\u5165\u7684\u661f\u671f\u4fe1\u606f\u4e0d\u5b58\u5728~~~");\n}<\/code><\/pre>\n
      \n
    • \n
      \u5982\u679c\u662f\u5bf9\u4e00\u4e2a\u8303\u56f4\u8fdb\u884c\u5224\u65ad\uff0c\u5efa\u8bae\u4f7f\u7528if\u5206\u652f\u7ed3\u6784<\/p>\n<\/li>\n
    • \n
      \u5982\u679c\u662f\u4e0e\u4e00\u4e2a\u4e00\u4e2a\u7684\u503c\u6bd4\u8f83\u7684\u65f6\u5019\uff0c\u5efa\u8bae\u4f7f\u7528switch\u5206\u652f\u7ed3\u6784<\/p>\n<\/li>\n<\/ul>\n
      1.3 \u6ce8\u610f\u4e8b\u9879<\/h3>\n
      1\uff09\u8868\u8fbe\u5f0f\u7c7b\u578b\u53ea\u80fd\u662fbyte\u3001short\u3001int\u3001char
      \nJDK5\u5f00\u59cb\u652f\u6301\u679a\u4e3e\uff0cJDK7\u5f00\u59cb\u652f\u6301String
      \n\u4e0d\u652f\u6301double\u3001float\u3001double<\/p>\n
      2\uff09case\u7ed9\u51fa\u7684\u503c\u4e0d\u5141\u8bb8\u91cd\u590d\uff0c\u4e14\u53ea\u80fd\u662f\u5b57\u9762\u91cf\uff0c\u4e0d\u80fd\u662f\u53d8\u91cf\u3002<\/p>\n
      3\uff09\u6b63\u5e38\u4f7f\u7528switch\u7684\u65f6\u5019\uff0c\u4e0d\u8981\u5fd8\u8bb0\u5199break\uff0c\u5426\u5219\u4f1a\u51fa\u73b0\u7a7f\u900f\u73b0\u8c61\u3002<\/p>\n
      \u4e8c\u3001\u5faa\u73af\u7ed3\u6784<\/h2>\n
      2.1 for\u5faa\u73af<\/h3>\n
      \/\/for\u5faa\u73af\u683c\u5f0f\uff1a\nfor (\u521d\u59cb\u5316\u8bed\u53e5; \u5faa\u73af\u6761\u4ef6; \u8fed\u4ee3\u8bed\u53e5) {\n    \u5faa\u73af\u4f53\u8bed\u53e5(\u91cd\u590d\u6267\u884c\u7684\u4ee3\u7801);\n}\n\u521d\u59cb\u5316\u8bed\u53e5\uff1a\u4e00\u822c\u662f\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\uff0c\u5e76\u7ed9\u521d\u59cb\u503c\n\u5faa\u73af\u6761\u4ef6\uff1a\u4e00\u822c\u662f\u4e00\u4e2a\u5173\u7cfb\u8868\u8fbe\u5f0f\uff0c\u7ed3\u679c\u5fc5\u987b\u662ftrue\u6216\u8005false\n\u8fed\u4ee3\u8bed\u53e5\uff1a\u7528\u4e8e\u5bf9\u6761\u4ef6\u8fdb\u884c\u63a7\u5236\uff0c\u4e00\u822c\u662f\u81ea\u589e\u6216\u8005\u81ea\u51cf\n\u5faa\u73af\u8bed\u53e5\u4f53\uff1a\u9700\u8981\u91cd\u590d\u6267\u884c\u7684\u4ee3\u7801<\/code><\/pre>\n
      2.2 \u4e3e\u4f8b<\/h3>\n
      2.2.1 \u6c42\u548c<\/h4>\n
      \/\/2.\u9700\u6c42\uff1a\u6c421~100\u4e2d\u6240\u6709\u6574\u6570\u7684\u548c\nint sum = 0;\n\/\/\u5b9a\u4e49\u4e00\u4e2a\u5faa\u73af\uff0c\u5148\u4ea7\u751f1-100\uff0c\u8fd9100\u4e2a\u6570\nfor (int i = 1; i <= 100; i++) {\n    \/\/\u6bcf\u4ea7\u751f\u4e00\u4e2a\u6570\u636e\uff0c\u5c31\u628a\u8fd9\u4e2a\u6570\u548csum\u7d2f\u52a0\n    sum += i; \/\/sum = sum  + i;\n}\nSystem.out.println("1-100\u7684\u6570\u636e\u548c\uff1a" +  sum);<\/code><\/pre>\n
      2.2.2 \u6c42\u5947\u6570\u548c<\/h4>\n
      \u5199\u6cd5\u4e00\uff1a<\/p>\n
      \/\/1)\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u7528\u4e8e\u6c42\u548c\nint sum1 = 0;\n\/\/2)\u5b9a\u4e49\u4e00\u4e2a\u5faa\u73af\u4ea7\u751f1-100\u4e4b\u95f4\u7684\u5947\u6570\nfor (int i = 1; i < 100; i+=2) {\n    \/\/ i = 1 3 5 7 ...\n    \/\/3)\u8ba9\u9700\u8981\u6c42\u548c\u7684\u6570\u636e\u548csum1\u7d2f\u52a0\uff0c\n    sum1 += i;\n}\nSystem.out.println("1-100\u4e4b\u95f4\u7684\u5947\u6570\u548c\uff1a" +  sum1);<\/code><\/pre>\n
      \u5199\u6cd5\u4e8c\uff1a<\/p>\n
      \/\/1)\u9996\u5148\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u6c42\u548c\u53d8\u91cf\uff0c\u8fd9\u91cc\u547d\u540d\u4e3asum2\nint sum2 = 0; \n\/\/2)\u518d\u904d\u5386\u5f97\u5230\u6240\u6709\u9700\u8981\u6c42\u548c\u7684\u6570\u636e(1~100\u4e4b\u95f4\u7684\u6240\u6709\u6574\u6570)\nfor (int i = 1; i <= 100; i++) {\n    \/\/i = 1 2 3 4 5 6 ... 99 100\n    \/\/3)\u5728\u6c42\u548c\u4e4b\u524d\u5148\u5bf9\u6570\u636e\u5224\u65ad\uff0c\u5982\u679c\u662f\u5947\u6570\uff0c\u624d\u548csum1\u7d2f\u52a0\uff1b\u5426\u5219\u4ec0\u4e48\u4e5f\u4e0d\u5e72\n    if(i % 2 == 1){\n        \/\/ i = 1 3 5 7 9 ... 99\n        sum2 += i;\n    }\n}\nSystem.out.println("1-100\u4e4b\u95f4\u7684\u5947\u6570\u548c\uff1a" + sum2);<\/code><\/pre>\n
      2.3 while\u5faa\u73af<\/h3>\n
      \"image-20231115162939955\"<\/div><\/p>\n
      \/\/ \u9700\u6c42\uff1a\u6253\u53705\u884cHello World\nint i = 0;\nwhile (i < 5) {\n    \/\/ i = 0 1 2 3 4\n    System.out.println("Hello World");\n    i++;\n}<\/code><\/pre>\n
      2.3.1 \u4e3e\u4f8b<\/h4>\n
      \u9700\u6c42\uff1a\u4e16\u754c\u6700\u9ad8\u5c71\u5cf0\u73e0\u7a46\u6717\u739b\u5cf0\u9ad8\u5ea6\u662f\uff1a8848.86\u7c73=8848860\u6beb\u7c73\uff0c\u5047\u5982\u6211\u6709\u4e00\u5f20\u8db3\u591f\u5927\u7684\u5b83\u7684\u539a\u5ea6\u662f0.1\u6beb\u7c73\u3002\u8bf7\u95ee\uff1a\u8be5\u7eb8\u5f20\u6298\u53e0\u591a\u5c11\u6b21\uff0c\u53ef\u4ee5\u6298\u6210\u73e0\u7a46\u6717\u739b\u5cf0\u7684\u9ad8\u5ea6\uff1f<\/p>\n
      \/\/ 1\u3001\u5b9a\u4e49\u53d8\u91cf\u8bb0\u4f4f\u73e0\u7a46\u6717\u739b\u5cf0\u7684\u9ad8\u5ea6\u548c\u7eb8\u5f20\u7684\u9ad8\u5ea6\u3002\ndouble peakHeight = 8848860;\ndouble paperThickness = 0.1;\n\/\/ 3\u3001\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cfcount\u7528\u4e8e\u8bb0\u4f4f\u7eb8\u5f20\u6298\u53e0\u4e86\u591a\u5c11\u6b21\nint count = 0;\n\/\/ 2\u3001\u5b9a\u4e49while\u5faa\u73af\u63a7\u5236\u7eb8\u5f20\u5f00\u59cb\u6298\u53e0\nwhile (paperThickness < peakHeight) {\n    \/\/ \u628a\u7eb8\u5f20\u8fdb\u884c\u6298\u53e0\uff0c\u628a\u7eb8\u5f20\u7684\u539a\u5ea6\u53d8\u6210\u539f\u6765\u76842\u500d\u3002\n    paperThickness = paperThickness * 2;\n    count++;\n}\nSystem.out.println("\u9700\u8981\u6298\u53e0\u591a\u5c11\u6b21\uff1a" + count);\nSystem.out.println("\u6700\u7ec8\u7eb8\u5f20\u7684\u539a\u5ea6\u662f\uff1a" + paperThickness);<\/code><\/pre>\n
      2.4 do-while\u5faa\u73af<\/h3>\n
      \"image-20231115163053458\"<\/div><\/p>\n
      2.5 \u5faa\u73af\u5d4c\u5957<\/h3>\n
      \u9700\u6c42\uff1a\u5728\u63a7\u5236\u53f0\u4f7f\u7528 * \u6253\u5370\u51fa4\u884c5\u5217\u7684\u77e9\u5f62\n    ****\n    ****\n    ****\n    ****<\/code><\/pre>\n
      \/\/1)\u5148\u5199\u4e00\u4e2a\u5faa\u73af\u7528\u6765\u5728\u4e00\u884c\u4e2d\u6253\u53705\u4e2a"*"\nfor (int j = 1; j <= 5; j++) {\n    System.out.print("*"); \/\/ \u4e0d\u6362\u884c\n}\nSystem.out.println(); \/\/\u6362\u884c\nSystem.out.println("-----------------");\n\/\/2)\u518d\u5c06\u7b2c\u4e00\u6b65\u7684\u4ee3\u7801\u5957\u4e00\u5c42\u5faa\u73af\uff0c\u6267\u884c4\u6b21\uff0c\u5c31\u53ef\u4ee5\u6253\u53704\u884c\nfor (int i = 1; i <= 4; i++) {\n    for (int j = 1; j <= 5; j++) {\n        System.out.print("*"); \/\/ \u4e0d\u6362\u884c\n    }\n    System.out.println(); \/\/\u6362\u884c\n}<\/code><\/pre>\n
      2.6 \u8df3\u8f6c\u8bed\u53e5 break\u3001continue<\/h3>\n
      break\u4f5c\u7528\uff1a\u8df3\u51fa\u5e76\u7ed3\u675f\u5f53\u524d\u6240\u5728\u5faa\u73af\u7684\u6267\u884c<\/p>\n
      continue\u4f5c\u7528\uff1a\u7ed3\u675f\u672c\u6b21\u5faa\u73af\uff0c\u8fdb\u5165\u4e0b\u4e00\u6b21\u5faa\u73af<\/p>\n
      \u4e09\u3001\u751f\u6210\u968f\u673a\u6570<\/h2>\n
      3.1 \u4ea7\u751f\u968f\u673a\u6570\u6848\u4f8b<\/h3>\n
      \/\/ \u76ee\u6807\uff1a\u638c\u63e1\u4f7f\u7528Random\u751f\u6210\u968f\u673a\u6570\u7684\u6b65\u9aa4\u3002\n\/\/ 1\u3001\u5bfc\u5305\u3002import java.util.Random; (idea\u4f1a\u81ea\u52a8\u5b8c\u6210)\nimport java.util.Random;\npublic class RandomDemo1 {\n    public static void main(String[] args) {\n        \/\/ 2\u3001\u521b\u5efa\u4e00\u4e2aRandom\u5bf9\u8c61\uff0c\u7528\u4e8e\u751f\u6210\u968f\u673a\u6570\u3002\n        Random r = new Random();\n        \/\/ 3\u3001\u8c03\u7528Random\u63d0\u4f9b\u7684\u529f\u80fd\uff1anextInt\u5f97\u5230\u968f\u673a\u6570\u3002\n        for (int i = 1; i <= 20; i++) {\n            int data = r.nextInt(10); \/\/ 0 - 9\n            System.out.println(data);\n        }\n    }\n}<\/code><\/pre>\n
      3.2 \u731c\u6570\u5b57\u5c0f\u6e38\u620f<\/h3>\n
      import java.util.Random;\nimport java.util.Scanner;\npublic class RandomTest2 {\n    public static void main(String[] args) {\n        \/\/ 1\u3001\u968f\u673a\u4ea7\u751f\u4e00\u4e2a1-100\u4e4b\u95f4\u7684\u6570\u636e\uff0c\u505a\u4e3a\u4e2d\u5956\u53f7\u7801\u3002\n        Random r = new Random();\n        int luckNumber = r.nextInt(100) + 1;\n        \/\/ 2\u3001\u5b9a\u4e49\u4e00\u4e2a\u6b7b\u5faa\u73af\uff0c\u8ba9\u7528\u6237\u4e0d\u65ad\u7684\u731c\u6d4b\u6570\u636e\n        Scanner sc = new Scanner(System.in);\n        while (true) {\n            \/\/ \u63d0\u793a\u7528\u6237\u731c\u6d4b\n            System.out.println("\u8bf7\u60a8\u8f93\u5165\u60a8\u731c\u6d4b\u7684\u6570\u636e\uff1a");\n            int guessNumber = sc.nextInt();\n            \/\/ 3\u3001\u5224\u65ad\u7528\u6237\u731c\u6d4b\u7684\u6570\u5b57\u4e0e\u5e78\u8fd0\u53f7\u7801\u7684\u5927\u5c0f\u60c5\u51b5\n            if(guessNumber > luckNumber){\n                System.out.println("\u60a8\u731c\u6d4b\u7684\u6570\u5b57\u8fc7\u5927~~");\n            }else if(guessNumber < luckNumber){\n                System.out.println("\u60a8\u731c\u6d4b\u7684\u6570\u5b57\u8fc7\u5c0f~~");\n            }else {\n                System.out.println("\u606d\u559c\u60a8\uff0c\u731c\u6d4b\u6210\u529f\u4e86\uff0c\u53ef\u4ee5\u4e70\u5355\u4e86~~");\n                break; \/\/ \u7ed3\u675f\u6b7b\u5faa\u73af\n            }\n        }\n    }\n}<\/code><\/pre>\n
      \u7b2c\u56db\u90e8\u5206 \u6570\u7ec4<\/h1>\n
      \u4e00\u3001\u8ba4\u8bc6\u6570\u7ec4<\/h2>\n
      \u6570\u7ec4\u5c31\u662f\u4e00\u4e2a\u5bb9\u5668\uff0c\u7528\u6765\u5b58\u4e00\u6279\u540c\u79cd\u7c7b\u578b\u7684\u6570\u636e\u7684<\/p>\n
      int[] array = {20,10,80,60,90};\nString[] names = {"\u725b\u4e8c", "\u897f\u95e8", "\u5168\u86cb"};<\/code><\/pre>\n
      \u573a\u666f\uff1a\u9047\u5230\u6279\u91cf\u6570\u636e\u7684\u5b58\u50a8\u548c\u64cd\u4f5c\u65f6\uff0c\u6570\u7ec4\u6bd4\u53d8\u91cf\u66f4\u9002\u5408<\/p>\n
      \u4e8c\u3001\u6570\u7ec4\u7684\u5b9a\u4e49\u548c\u8bbf\u95ee<\/h2>\n
      2.1 \u6570\u7ec4\u7684\u9759\u6001\u521d\u59cb\u5316<\/h3>\n
      \u6807\u51c6\u683c\u5f0f\uff1a<\/p>\n
      \u6570\u636e\u7c7b\u578b[] \u53d8\u91cf\u540d = new \u6570\u636e\u7c7b\u578b[]{\u5143\u7d201,\u5143\u7d202,\u5143\u7d203};<\/code><\/pre>\n
      \u4e3e\u4f8b\uff1a<\/p>\n
      \/\/\u5b9a\u4e49\u6570\u7ec4\uff0c\u7528\u6765\u5b58\u50a8\u591a\u4e2a\u5e74\u9f84\nint[] ages = new int[]{12, 24, 36}\n\/\/\u5b9a\u4e49\u6570\u7ec4\uff0c\u7528\u6765\u5b58\u50a8\u591a\u4e2a\u6210\u7ee9\ndouble[] scores = new double[]{89.9, 99.5, 59.5, 88.0};<\/code><\/pre>\n
      \u7b80\u5316\u683c\u5f0f\uff1a<\/p>\n
      \u6570\u636e\u7c7b\u578b[] \u53d8\u91cf\u540d = {\u5143\u7d201,\u5143\u7d202,\u5143\u7d203};<\/code><\/pre>\n
      \u4e3e\u4f8b\uff1a<\/p>\n
      \/\/\u5b9a\u4e49\u6570\u7ec4\uff0c\u7528\u6765\u5b58\u50a8\u591a\u4e2a\u5e74\u9f84\nint[] ages = {12, 24, 36}\n\/\/\u5b9a\u4e49\u6570\u7ec4\uff0c\u7528\u6765\u5b58\u50a8\u591a\u4e2a\u6210\u7ee9\ndouble[] scores = {89.9, 99.5, 59.5, 88.0};<\/code><\/pre>\n
      \u53e6\u4e00\u79cd\u683c\u5f0f\uff1a<\/p>\n
      \u5b9a\u4e49\u6570\u7ec4\u65f6\uff0c \u6570\u636e\u7c7b\u578b[] \u6570\u7ec4\u540d<\/code> \u4e5f\u53ef\u5199\u6210 \u6570\u636e\u7c7b\u578b \u6570\u7ec4\u540d[]<\/code> <\/p>\n
      \u4e3e\u4f8b\uff1a<\/p>\n
      \/\/\u4ee5\u4e0b\u4e24\u79cd\u5199\u6cd5\u662f\u7b49\u4ef7\u7684\u3002\u4f46\u662f\u5efa\u8bae\u5927\u5bb6\u7528\u7b2c\u4e00\u79cd\uff0c\u56e0\u4e3a\u8fd9\u79cd\u5199\u6cd5\u66f4\u52a0\u666e\u904d\nint[] ages = {12, 24, 36};\nint ages[] = {12, 24, 36}<\/code><\/pre>\n
      \u5b58\u50a8\u539f\u7406\uff1a<\/p>\n
      \"image-20231115164054535\"<\/div><\/p>\n
      2.2 \u6570\u7ec4\u7684\u5143\u7d20\u8bbf\u95ee<\/h3>\n
      \"image-20231115164246360\"<\/div><\/p>\n
      \/\/\u7d22\u5f15\uff1a      0   1   2\nint[] arr = {12, 24, 36};\n\/\/ 1\u3001\u8bbf\u95ee\u6570\u7ec4\u7684\u5168\u90e8\u6570\u636e\nSystem.out.println(arr[0]); \/\/12\nSystem.out.println(arr[1]); \/\/24\nSystem.out.println(arr[2]); \/\/36\n\/\/\u4e0b\u9762\u4ee3\u7801\u6ca1\u67093\u7d22\u5f15\uff0c\u4f1a\u51fa\u73b0ArrayIndexOutOfBoundsException \u7d22\u5f15\u8d8a\u754c\u5f02\u5e38\n\/\/System.out.println(arr[3]); \n\/\/ 2\u3001\u4fee\u6539\u6570\u7ec4\u4e2d\u7684\u6570\u636e\narr[0] = 66;\narr[2] = 100;\nSystem.out.println(arr[0]); \/\/66\nSystem.out.println(arr[1]); 0\nSystem.out.println(arr[2]); \/\/100<\/code><\/pre>\n
      2.3 \u6570\u7ec4\u7684\u904d\u5386<\/h3>\n
      int[] ages = {12, 24, 36};\nfor (int i = 0; i < ages.length; i++) {\n    \/\/ i\u7684\u53d6\u503c = 0,1,2\n    System.out.println(ages[i]); \n}<\/code><\/pre>\n
      2.4 \u4e3e\u4f8b<\/h3>\n
      \u9700\u6c42\uff1a\u67d0\u90e8\u95e85\u540d\u5458\u5de5\u7684\u9500\u552e\u989d\u5206\u522b\u662f\uff1a16\u300126\u300136\u30016\u3001100\uff0c\u8bf7\u8ba1\u7b97\u51fa\u4ed6\u4eec\u90e8\u95e8\u7684\u603b\u9500\u552e\u989d\u3002\n\u9700\u6c42\u5206\u6790\uff1a\n    1.\u770b\u5230\u670916\u300126\u300136\u30016\u3001100\u8fd95\u4e2a\u6570\u636e\u6570\u636e\uff0c\u800c\u4e14\u6570\u636e\u503c\u5f88\u660e\u786e;\n        1)\u60f3\u5230,\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u9759\u6001\u521d\u59cb\u5316\u628a\u8fd95\u4e2a\u6570\u636e\u5b58\u8d77\u6765\n2.\u8bf7\u8ba1\u7b97\u51fa\u4ed6\u4eec\u90e8\u95e8\u7684\u603b\u9500\u552e\u989d\uff08\u8fd9\u4e0d\u5c31\u662f\u6c42\u6570\u7ec4\u4e2d\u6570\u636e\u7684\u548c\u5417\uff1f\uff09\n    2)\u5fc5\u987b\u5148\u5c06\u6570\u7ec4\u4e2d\u6240\u6709\u7684\u5143\u7d20\u904d\u5386\u51fa\u6765\n    3)\u60f3\u8981\u6c42\u548c\uff0c\u5f97\u5148\u6709\u4e00\u4e2a\u6c42\u548c\u53d8\u91cfsum\n    4)\u518d\u5c06\u6bcf\u4e00\u4e2a\u5143\u7d20\u548c\u6c42\u548c\u53d8\u91cfsum\u8fdb\u884c\u7d2f\u52a0\uff08\u6c42\u548c\u601d\u60f3\uff09<\/code><\/pre>\n
      \/\/ 1\u3001\u5b9a\u4e49\u4e00\u4e2a\u6570\u7ec4\u5b58\u50a85\u540d\u5458\u5de5\u7684\u9500\u552e\u989d\n\/\/\u7d22\u5f15          0   1    2  3   4\nint[] money = {16, 26, 36, 6, 100};\n\/\/ 3\u3001\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u7528\u4e8e\u7d2f\u52a0\u6c42\u548c\nint sum = 0;\n\/\/ 2\u3001\u904d\u5386\u8fd9\u4e2a\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u6570\u636e\u3002\nfor (int i = 0; i < money.length; i++) {\n    \/\/ i = 0  1  2  3  4\n    sum += money[i];\n}\nSystem.out.println("\u5458\u5de5\u7684\u9500\u552e\u603b\u989d\uff1a" + sum);<\/code><\/pre>\n
      2.5 \u6570\u7ec4\u7684\u52a8\u6001\u521d\u59cb\u5316<\/h3>\n
      \/\/\u6570\u636e\u7c7b\u578b[]  \u6570\u7ec4\u540d = new \u6570\u636e\u7c7b\u578b[\u957f\u5ea6];\nint[] arr = new int[3];<\/code><\/pre>\n
      \"image-20231115164521740\"<\/div><\/p>\n
      \u4f7f\u7528\u52a8\u6001\u521d\u59cb\u5316\u5b9a\u4e49\u6570\u7ec4\u65f6\uff0c\u6839\u636e\u5143\u7d20\u7c7b\u578b\u4e0d\u540c\uff0c\u9ed8\u8ba4\u503c\u4e5f\u6709\u6240\u4e0d\u540c<\/p>\n
      \"image-20231115164535979\"<\/div><\/p>\n
      2.6 \u4e3e\u4f8b<\/h3>\n
      \u6848\u4f8b\u9700\u6c42\uff1a\n    \u67d0\u6b4c\u5531\u6bd4\u8d5b\uff0c\u9700\u8981\u5f00\u53d1\u4e00\u4e2a\u7cfb\u7edf\uff1a\u53ef\u4ee5\u5f55\u51656\u540d\u8bc4\u59d4\u7684\u6253\u5206\uff0c\u5f55\u5165\u5b8c\u6bd5\u540e\u7acb\u5373\u8f93\u51fa\u5e73\u5747\u5206\u505a\n    \u9009\u624b\u5f97\u5206\n\u9700\u6c42\u5206\u6790\uff1a\n    1.\u9700\u8981\u5f55\u51656\u540d\u8bc4\u59d4\u7684\u5206\u6570\uff0c\u53ef\u4ee5\u7528\u4e00\u4e2a\u6570\u7ec4\u6765\u4fdd\u5b58\u3002\n       \u56e0\u4e3a\u5728\u8bc4\u59d4\u6ca1\u6709\u5f55\u5165\u5206\u6570\u4e4b\u524d\uff0c\u8fd8\u4e0d\u786e\u5b9a\u6570\u7ec4\u4e2d\u5e94\u8be5\u5b58\u54ea\u4e9b\u6570\u636e\u3002\n       \u6240\u4ee5\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u7684\u52a8\u6001\u521d\u59cb\u5316\n    2.\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e00\u4e2a\u4f4d\u7f6e\uff0c\u5e76\u5f55\u5165\u5206\u6570\uff0c\u5c06\u5206\u6570\u5b58\u5165\u6570\u7ec4\u4e2d\n    3.\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\uff0c\u5bf9\u5143\u7d20\u6c42\u548c<\/code><\/pre>\n
      \/\/ 1\u3001\u5b9a\u4e49\u4e00\u4e2a\u52a8\u6001\u521d\u59cb\u5316\u7684\u6570\u7ec4\uff0c\u8d1f\u8d23\u540e\u671f\u5b58\u50a86\u4e2a\u8bc4\u59d4\u7684\u6253\u5206\u3002\ndouble[] scores = new double[6];\nScanner sc  = new Scanner(System.in);\n\/\/ 2\u3001\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u4f4d\u7f6e\uff0c\u5f55\u5165\u8bc4\u59d4\u7684\u5206\u6570\uff0c\u5b58\u5165\u5230\u6570\u7ec4\u4e2d\u53bb\nfor (int i = 0; i < scores.length; i++) {\n    \/\/ i = 0 1 2 3 4 5\n    System.out.println("\u8bf7\u60a8\u8f93\u5165\u5f53\u524d\u7b2c" + (i + 1) +"\u4e2a\u8bc4\u59d4\u7684\u5206\u6570\uff1a");\n    double score = sc.nextDouble();\n    scores[i] = score;\n}\n\/\/ 3\u3001\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u6c42\u548c\ndouble sum  = 0;\nfor (int i = 0; i < scores.length; i++) {\n    sum += scores[i];\n}\nSystem.out.println("\u9009\u624b\u6700\u7ec8\u5f97\u5206\u662f\uff1a" + sum \/ scores.length);<\/code><\/pre>\n
      \u4e09\u3001\u6570\u7ec4\u5728\u8ba1\u7b97\u673a\u4e2d\u7684\u6267\u884c\u539f\u7406<\/h2>\n
      3.1 \u6570\u7ec4\u7684\u6267\u884c\u539f\u7406\uff0cJava\u7a0b\u5e8f\u7684\u6267\u884c\u539f\u7406<\/h3>\n
      Java\u4e3a\u4e86\u4fbf\u4e8e\u865a\u62df\u673a\u6267\u884cJava\u7a0b\u5e8f\uff0c\u5c06\u865a\u62df\u673a\u7684\u5185\u5b58\u5212\u5206\u4e3a \u65b9\u6cd5\u533a\u3001\u6808\u3001\u5806\u3001\u672c\u5730\u65b9\u6cd5\u6808\u3001\u5bc4\u5b58\u5668 \u8fd95\u5757\u533a\u57df\u3002\u540c\u5b66\u4eec\u9700\u8981\u91cd\u70b9\u5173\u6ce8\u7684\u662f  \u65b9\u6cd5\u533a\u3001\u6808\u3001\u5806<\/strong><\/p>\n
        \n
      • \u65b9\u6cd5\u533a<\/strong>\uff1a\u5b57\u8282\u7801\u6587\u4ef6\u5148\u52a0\u8f7d\u5230\u8fd9\u91cc<\/li>\n
      • \u6808<\/strong>\uff1a\u65b9\u6cd5\u8fd0\u884c\u65f6\u6240\u8fdb\u5165\u7684\u5185\u5b58\u533a\u57df\uff0c\u7531\u4e8e\u53d8\u91cf\u5728\u65b9\u6cd5\u4e2d\uff0c\u6240\u4ee5\u53d8\u91cf\u4e5f\u5728\u8fd9\u4e00\u5757\u533a\u57df\u4e2d<\/li>\n
      • \u5806<\/strong>\uff1a\u5b58\u50a8new\u51fa\u6765\u7684\u4e1c\u897f\uff0c\u5e76\u5206\u914d\u5730\u5740\u3002\u7531\u4e8e\u6570\u7ec4\u662fnew \u51fa\u6765\u7684\uff0c\u6240\u4ee5\u6570\u7ec4\u4e5f\u5728\u8fd9\u5757\u533a\u57df\u3002<\/li>\n<\/ul>\n
        \"image-20231115164944530\"<\/div><\/p>\n
        \u603b\u7ed3\u4e00\u4e0bint a = 10<\/code>\u4e0e int[] arr = new int[]{11,22,33}\u7684\u533a\u522b<\/code><\/strong><\/p>\n
          \n
        • a<\/strong>\u662f\u4e00\u4e2a\u53d8\u91cf\uff0c\u5728\u6808\u5185\u5b58\u4e2d\uff0ca<\/strong>\u53d8\u91cf\u4e2d\u5b58\u50a8\u7684\u6570\u636e\u5c31\u662f10<\/strong>\u8fd9\u4e2a\u503c\u3002<\/li>\n
        • arr<\/strong>\u4e5f\u662f\u4e00\u4e2a\u53d8\u91cf\uff0c\u5728\u6808\u4e2d\uff0c\u5b58\u50a8\u7684\u662f\u6570\u7ec4\u5bf9\u8c61\u5728\u5806\u5185\u5b58\u4e2d\u7684\u5730\u5740\u503c<\/li>\n<\/ul>\n
          \/\/ \u8fd9\u91cc\u7684int a\u662f\u4e00\u4e2a\u57fa\u672c\u7c7b\u578b\u53d8\u91cf\uff0c\u5b58\u50a8\u7684\u662f\u4e00\u4e2a\u6570\u503c\nint a = 10 ; \n\/\/\u8fd9\u91cc\u7684int[] arr\u662f\u4e00\u4e2a\u5f15\u7528\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u5b58\u50a8\u7684\u662f\u4e00\u4e2a\u5730\u5740\u503c\nint[] arr = new int[]{44,55,66};<\/code><\/pre>\n
          3.2 \u591a\u4e2a\u53d8\u91cf\u6307\u5411\u540c\u4e00\u4e2a\u6570\u7ec4<\/h3>\n
          \u4e24\u4e2a\u53d8\u91cf\u6307\u5411\u540c\u4e00\u4e2a\u6570\u7ec4\u65f6\uff0c\u4e24\u4e2a\u53d8\u91cf\u8bb0\u5f55\u7684\u662f\u540c\u4e00\u4e2a\u5730\u5740\u503c\u3002<\/p>\n
          \u5f53\u4e00\u4e2a\u53d8\u91cf\u4fee\u6539\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u65f6\uff0c\u53e6\u4e00\u4e2a\u53d8\u91cf\u53bb\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u5143\u7d20\u5df2\u7ecf\u88ab\u4fee\u6539\u8fc7\u4e86\u3002<\/p>\n
          \u56db\u3001\u6570\u7ec4\u7ec3\u4e60<\/h2>\n
          4.1 \u6570\u7ec4\u6c42\u6700\u503c<\/h3>\n
          \u6570\u7ec4\u6c42\u6700\u5927\u503c\u601d\u8def\uff1a\n    1)\u5148\u627e\u51fa\u6570\u7ec4\u4e2d0\u7d22\u5f15\u7684\u5143\u7d20\uff0c\u5047\u8bbe\u4e3a\u6700\u5927\u503c\uff0c\u7528max\u8868\u793a\u3010\u64c2\u4e3b\u3011\n    2)\u904d\u5386\u540e\u9762\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u548cmax\u6bd4\u8f83\uff0c\u628a\u8f83\u5927\u7684\u5143\u7d20\u503c\u91cd\u65b0\u8d4b\u503c\u7ed9max(\u64c2\u4e3b\u6362\u4eba)\n    3)\u6700\u540emax\u5c31\u662f\u6240\u6709\u5143\u7d20\u7684\u6700\u5927\u503c(\u6700\u540e\u7ad9\u5728\u53f0\u4e0a\u7684\u64c2\u4e3b)<\/code><\/pre>\n
          public class Test1 {\n    public static void main(String[] args) {\n        \/\/ 1\u3001\u628a\u989c\u503c\u6570\u636e\u62ff\u5230\u7a0b\u5e8f\u4e2d\u6765\uff0c\u7528\u6570\u7ec4\u88c5\u8d77\u6765\n        int[] faceScores = {15, 9000, 10000, 20000, 9500, -5};\n        \/\/ 2\u3001\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u7528\u4e8e\u6700\u7ec8\u8bb0\u4f4f\u6700\u5927\u503c\u3002\n        int max = faceScores[0];\n        \/\/ 3\u3001\u4ece\u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u4f4d\u7f6e\u5f00\u59cb\u904d\u5386\u3002\n        for (int i = 1; i < faceScores.length; i++) {\n            \/\/ i = 1  2  3  4  5\n            \/\/ \u5224\u65ad\u4e00\u4e0b\u5f53\u524d\u904d\u5386\u7684\u8fd9\u4e2a\u6570\u636e\uff0c\u662f\u5426\u5927\u4e8e\u6700\u5927\u503c\u53d8\u91cfmax\u5b58\u50a8\u7684\u6570\u636e\uff0c\n            \/\/\u5982\u679c\u5927\u4e8e\uff0c\u5f53\u524d\u904d\u5386\u7684\u6570\u636e\u9700\u8981\u8d4b\u503c\u7ed9max\n            if(faceScores[i] > max ){\n                max = faceScores[i];\n            }\n        }\n        System.out.println("\u6700\u9ad8\u989c\u503c\u662f\uff1a" + max);\n    }\n}<\/code><\/pre>\n
          4.2 \u6570\u7ec4\u5143\u7d20\u53cd\u8f6c<\/h3>\n
          \u9700\u6c42\uff1a\u67d0\u4e2a\u6570\u7ec4\u67095\u4e2a\u6570\u636e\uff1a10,20,30,40,50\uff0c\u8bf7\u5c06\u8fd9\u4e2a\u6570\u7ec4\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u53cd\u8f6c\u3002\n      [10, 20, 30, 40, 50]  \u53cd\u8f6c\u540e [50, 40, 30, 20, 10]<\/code><\/pre>\n
          public class Test2 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u5b8c\u6210\u6570\u7ec4\u53cd\u8f6c\u3002\n        \/\/ 1\u3001\u51c6\u5907\u4e00\u4e2a\u6570\u7ec4\n        int[] arr = {10, 20, 30, 40, 50};  \n        \/\/ 2\u3001\u5b9a\u4e49\u4e00\u4e2a\u5faa\u73af\uff0c\u8bbe\u8ba12\u4e2a\u53d8\u91cf\uff0c\u4e00\u4e2a\u5728\u524d\uff0c\u4e00\u4e2a\u5728\u540e\n        for (int i = 0, j = arr.length - 1; i < j; i++, j--) {\n            \/\/ arr[i]   arr[j]\n            \/\/ \u4ea4\u6362\n            \/\/ 1\u3001\u5b9a\u4e49\u4e00\u4e2a\u4e34\u65f6\u53d8\u91cf\u8bb0\u4f4f\u540e\u4e00\u4e2a\u4f4d\u7f6e\u5904\u7684\u503c\n            int temp = arr[j];\n            \/\/ 2\u3001\u628a\u524d\u4e00\u4e2a\u4f4d\u7f6e\u5904\u7684\u503c\u8d4b\u503c\u7ed9\u540e\u4e00\u4e2a\u4f4d\u7f6e\u4e86\n            arr[j] = arr[i];\n            \/\/ 3\u3001\u628a\u4e34\u65f6\u53d8\u91cf\u4e2d\u8bb0\u4f4f\u7684\u540e\u4e00\u4e2a\u4f4d\u7f6e\u5904\u7684\u503c\u8d4b\u503c\u7ed9\u524d\u4e00\u4e2a\u4f4d\u7f6e\u5904\n            arr[i] = temp;\n        }\n        \/\/ 3\u3001\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u6570\u636e\uff0c\u770b\u662f\u5426\u53cd\u8f6c\u6210\u529f\u4e86\n        for (int i = 0; i < arr.length; i++) {\n            System.out.print(arr[i] + " ");\n        }\n    }\n}<\/code><\/pre>\n
          4.3 \u968f\u673a\u6392\u540d<\/h3>\n
          \u9700\u6c42\uff1a\u67d0\u516c\u53f8\u5f00\u53d1\u90e85\u540d\u5f00\u53d1\u4eba\u5458\uff0c\u8981\u8fdb\u884c\u9879\u76ee\u8fdb\u5c55\u6c47\u62a5\u6f14\u8bb2\uff0c\u73b0\u5728\u91c7\u53d6\u968f\u673a\u6392\u540d\u540e\u8fdb\u884c\u6c47\u62a5\u3002\u8bf7\u5148\u4f9d\u6b21\u5f55\u51655\u540d\u5458\u5de5\u7684\u5de5\u53f7\uff0c\u7136\u540e\u5c55\u793a\u51fa\u4e00\u7ec4\u968f\u673a\u7684\u6392\u540d\u987a\u5e8f\u3002<\/code><\/pre>\n
          public class Test3 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u5b8c\u6210\u968f\u673a\u6392\u540d\n        \/\/ 1\u3001\u5b9a\u4e49\u4e00\u4e2a\u52a8\u6001\u521d\u59cb\u5316\u7684\u6570\u7ec4\u7528\u4e8e\u5b58\u50a85\u540d\u5458\u5de5\u7684\u5de5\u53f7\n        int[] codes = new int[5];\n        \/\/ 2\u3001\u63d0\u793a\u7528\u6237\u5f55\u51655\u540d\u5458\u5de5\u7684\u5de5\u53f7\u3002\n        Scanner sc = new Scanner(System.in);\n        for (int i = 0; i < codes.length; i++) {\n            \/\/ i = 0 1 2 3 4\n            System.out.println("\u8bf7\u60a8\u8f93\u5165\u7b2c" + (i + 1) +"\u4e2a\u5458\u5de5\u7684\u5de5\u53f7\uff1a");\n            int code = sc.nextInt();\n            codes[i] = code;\n        }\n        \/\/ 3\u3001\u6253\u4e71\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u987a\u5e8f\u3002\n        \/\/ [12, 33, 54, 26, 8]\n        \/\/  i       index\n        Random r =  new Random();\n        for (int i = 0; i < codes.length; i++) {\n            \/\/ codes[i]\n            \/\/ \u6bcf\u904d\u5386\u5230\u4e00\u4e2a\u6570\u636e\uff0c\u90fd\u968f\u673a\u4e00\u4e2a\u6570\u7ec4\u7d22\u5f15\u8303\u56f4\u5185\u7684\u503c\u3002\n            \/\/\u7136\u540e\u8ba9\u5f53\u524d\u904d\u5386\u7684\u6570\u636e\u4e0e\u8be5\u7d22\u5f15\u4f4d\u7f6e\u5904\u7684\u503c\u4ea4\u6362\u3002\n            int index = r.nextInt(codes.length); \/\/ 0 - 4\n            \/\/ \u5b9a\u4e49\u4e00\u4e2a\u4e34\u65f6\u53d8\u91cf\u8bb0\u4f4findex\u4f4d\u7f6e\u5904\u7684\u503c\n            int temp = codes[index];\n            \/\/ \u628ai\u4f4d\u7f6e\u5904\u7684\u503c\u8d4b\u503c\u7ed9index\u4f4d\u7f6e\u5904\n            codes[index] = codes[i];\n            \/\/ \u628aindex\u4f4d\u7f6e\u539f\u6765\u7684\u503c\u8d4b\u503c\u7ed9i\u4f4d\u7f6e\u5904\n            codes[i] = temp;\n        }\n        \/\/ 4\u3001\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u5de5\u53f7\u8f93\u51fa\u5373\u53ef\n        for (int i = 0; i < codes.length; i++) {\n            System.out.print(codes[i] + " ");\n        }\n    }\n}<\/code><\/pre>\n
          \u7b2c\u4e94\u90e8\u5206 \u65b9\u6cd5<\/h1>\n
          \u4e00\u3001\u65b9\u6cd5\u6982\u8ff0<\/h2>\n
          1.1 \u4ec0\u4e48\u662f\u65b9\u6cd5<\/h3>\n
          \u65b9\u6cd5\u662f\u4e00\u79cd\u8bed\u6cd5\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u628a\u4e00\u6bb5\u4ee3\u7801\u5c01\u88c5\u6210\u4e00\u4e2a\u529f\u80fd\uff0c\u4ee5\u4fbf\u91cd\u590d\u8c03\u7528<\/p>\n
          \"image-20231115171857575\"<\/div><\/p>\n
          \/\/\u76ee\u6807\uff1a\u638c\u63e1\u5b9a\u4e49\u65b9\u6cd5\u7684\u5b8c\u6574\u683c\u5f0f\uff0c\u641e\u6e05\u695a\u4f7f\u7528\u65b9\u6cd5\u7684\u597d\u5904\u3002\npublic class MethodDemo1 {\n    public static void main(String[] args) {\n        \/\/ \u9700\u6c42\uff1a\u5047\u5982\u73b0\u5728\u5f88\u591a\u7a0b\u5e8f\u5458\u90fd\u8981\u8fdb\u884c2\u4e2a\u6574\u6570\u6c42\u548c\u7684\u64cd\u4f5c\u3002\n        \/\/ 1\u3001\u674e\u5de5\u3002\n        int rs = sum(10, 20);\n        System.out.println("\u548c\u662f\uff1a" + rs);\n        \/\/ 2\u3001\u5f20\u5de5\u3002\n        int rs2 = sum(30, 20);\n        System.out.println("\u548c\u662f\uff1a" + rs2);\n    }\n    public static int sum(int a,int b) {\n        int c = a + b;\n        return c;\n    }\n}<\/code><\/pre>\n
          1.2 \u65b9\u6cd5\u7684\u6267\u884c\u6d41\u7a0b<\/h3>\n
          \u5f53\u8c03\u7528\u4e00\u4e2a\u65b9\u6cd5\u65f6\uff0c\u6267\u884c\u6d41\u7a0b\uff0c\u6309\u7167\u4e0b\u56fe\u4e2d\u6807\u6ce8\u7684\u5e8f\u53f7\u6267\u884c\u3002<\/p>\n
          \u200b   \u2460 \u901a\u8fc7sum\u65b9\u6cd5\u540d\u627e\u5230sum\u65b9\u6cd5<\/p>\n
          \u200b   \u2461 \u628a10\u4f20\u9012\u7ed9\u65b9\u6cd5\u4e2d\u7684\u53c2\u6570a<\/p>\n
          \u200b   \u2462 \u628a20\u4f20\u9012\u7ed9\u65b9\u6cd5\u4e2d\u7684\u53c2\u6570b\uff1b<\/p>\n
          \u200b   \u2463  \u6267\u884c\u65b9\u6cd5\u4e2d\u7684\u4ee3\u7801\uff0c\u6b64\u65f6int c=a+b;<\/code>; \u76f8\u5f53\u4e8e int c = 10+20<\/code>; c\u7684\u503c\u4e3a30<\/p>\n
          1.3 \u5b9a\u4e49\u65b9\u6cd5\u7684\u6ce8\u610f\u70b9<\/h3>\n
          \"image-20231115172421393\"<\/div><\/p>\n
          \u65b9\u6cd5\u7684\u4fee\u9970\u7b26\uff1a\u6682\u65f6\u90fd\u4f7f\u7528public static \u4fee\u9970\u3002\uff08\u76ee\u524d\u770b\u505a\u662f\u56fa\u5b9a\u5199\u6cd5\uff0c\u540e\u9762\u662f\u53ef\u4ee5\u6539\u52a8\u7684\uff09<\/p>\n
          \u65b9\u6cd5\u7533\u660e\u4e86\u5177\u4f53\u7684\u8fd4\u56de\u503c\u7c7b\u578b\uff0c\u5185\u90e8\u5fc5\u987b\u4f7f\u7528return\u8fd4\u56de\u5bf9\u5e94\u7c7b\u578b\u7684\u6570\u636e\u3002<\/p>\n
          \u5f62\u53c2\u5217\u8868\u53ef\u4ee5\u6709\u591a\u4e2a\uff0c\u751a\u81f3\u53ef\u4ee5\u6ca1\u6709\uff1b \u5982\u679c\u6709\u591a\u4e2a\u5f62\u53c2\uff0c\u591a\u4e2a\u5f62\u53c2\u5fc5\u987b\u7528\u201c\uff0c\u201d\u9694\u5f00\uff0c\u4e14\u4e0d\u80fd\u7ed9\u521d\u59cb\u5316\u503c\u3002<\/p>\n
          1.4 \u4f7f\u7528\u65b9\u6cd5\u7684\u597d\u5904<\/h3>\n
          \u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u590d\u7528\u6027\uff0c\u63d0\u9ad8\u4e86\u5f00\u53d1\u6548\u7387\u3002<\/p>\n
          \u8ba9\u7a0b\u5e8f\u7684\u903b\u8f91\u66f4\u6e05\u6670\u3002<\/p>\n
          \u4e8c\u3001\u65b9\u6cd5\u7684\u5176\u4ed6\u5f62\u5f0f<\/h2>\n
          \u91cd\u70b9\u5173\u6ce8\u4e0b\u9762\u4e24\u70b9\uff1a<\/p>\n
            \n
          • \u65b9\u6cd5\u662f\u5426\u9700\u8981\u63a5\u6536\u5904\u7406\u6570\u636e<\/li>\n
          • \u65b9\u6cd5\u662f\u5426\u9700\u8981\u8fd4\u56de\u6570\u636e<\/li>\n<\/ul>\n
            \"image-20231115172935039\"<\/div><\/p>\n
            1\uff09\u5982\u679c\u65b9\u6cd5\u4e0d\u9700\u8981\u8fd4\u56de\u6570\u636e\uff0c\u8fd4\u56de\u503c\u7c7b\u578b\u5fc5\u987b\u7533\u660e\u6210void\uff08\u65e0\u8fd4\u56de\u503c\u7533\u660e\uff09,  \u6b64\u65f6\u65b9\u6cd5\u5185\u90e8\u4e0d\u53ef\u4ee5\u4f7f\u7528return\u8fd4\u56de\u6570\u636e\u3002<\/p>\n
            2\uff09\u65b9\u6cd5\u5982\u679c\u4e0d\u9700\u8981\u63a5\u6536\u5916\u90e8\u4f20\u9012\u8fdb\u6765\u7684\u6570\u636e\uff0c\u5219\u4e0d\u9700\u8981\u5b9a\u4e49\u5f62\u53c2\uff0c\u4e14\u8c03\u7528\u65b9\u6cd5\u65f6\u4e5f\u4e0d\u53ef\u4ee5\u4f20\u6570\u636e\u7ed9\u65b9\u6cd5\u3002<\/p>\n
            3\uff09\u6ca1\u6709\u53c2\u6570\uff0c\u4e14\u6ca1\u6709\u8fd4\u56de\u503c\u7c7b\u578b\uff08void\uff09\u7684\u65b9\u6cd5\uff0c\u79f0\u4e3a\u503c\u65e0\u53c2\u6570\u3001\u65e0\u8fd4\u56de\u503c\u65b9\u6cd5\u3002\u6b64\u65f6\u8c03\u7528\u65b9\u6cd5\u65f6\u4e0d\u80fd\u4f20\u9012\u6570\u636e\u7ed9\u65b9\u6cd5\u3002<\/p>\n
            \u4e09\u3001\u5e38\u89c1\u95ee\u9898<\/h2>\n
            1\uff09\u65b9\u6cd5\u5728\u5185\u79cd\u6ca1\u6709\u5148\u540e\u987a\u5e8f\uff0c\u4f46\u662f\u4e0d\u80fd\u628a\u4e00\u4e2a\u65b9\u6cd5\u5b9a\u4e49\u5728\u53e6\u4e00\u4e2a\u65b9\u6cd5\u4e2d\u3002<\/p>\n
            2\uff09\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u5199void\uff08\u65e0\u8fd4\u56de\u7533\u660e\uff09\u65f6\uff0c\u65b9\u6cd5\u5185\u4e0d\u80fd\u4f7f\u7528return\u8fd4\u56de\u6570\u636e\uff0c\u5982\u679c\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u7c7b\u578b\u5199\u4e86\u5177\u4f53\u7c7b\u578b\uff0c\u65b9\u6cd5\u5185\u90e8\u5219\u5fc5\u987b\u4f7f\u7528return\u8fd4\u56de\u5bf9\u5e94\u7c7b\u578b\u7684\u6570\u636e\u3002<\/p>\n
            3\uff09return\u8bed\u53e5\u7684\u4e0b\u9762\uff0c\u4e0d\u80fd\u7f16\u5199\u4ee3\u7801\uff0c\u5c5e\u4e8e\u65e0\u6548\u7684\u4ee3\u7801\uff0c\u6267\u884c\u4e0d\u5230\u8fd9\u513f\u3002<\/p>\n
            4\uff09\u65b9\u6cd5\u4e0d\u8c03\u7528\u5c31\u4e0d\u4f1a\u6267\u884c,  \u8c03\u7528\u65b9\u6cd5\u65f6\uff0c\u4f20\u7ed9\u65b9\u6cd5\u7684\u6570\u636e\uff0c\u5fc5\u987b\u4e25\u683c\u5339\u914d\u65b9\u6cd5\u7684\u53c2\u6570\u60c5\u51b5\u3002<\/p>\n
            5\uff09\u8c03\u7528\u6709\u8fd4\u56de\u503c\u7684\u65b9\u6cd5\uff0c\u67093\u79cd\u65b9\u5f0f\uff1a
            \n\u2460 \u53ef\u4ee5\u5b9a\u4e49\u53d8\u91cf\u63a5\u6536\u7ed3\u679c
            \n\u2461 \u6216\u8005\u76f4\u63a5\u8f93\u51fa\u8c03\u7528\uff0c
            \n\u2462 \u751a\u81f3\u76f4\u63a5\u8c03\u7528\uff1b<\/p>\n
            6\uff09\u8c03\u7528\u65e0\u8fd4\u56de\u503c\u7684\u65b9\u6cd5\uff0c\u53ea\u67091\u79cd\u65b9\u5f0f\uff1a \u53ea\u80fd\u76f4\u63a5\u8c03\u7528\u3002<\/p>\n
            \u56db\u3001\u4e3e\u4f8b<\/h2>\n
            4.1 \u8ba1\u7b971-n\u7684\u548c<\/h3>\n
            \/*\n\u5206\u6790\uff1a\n    \u9700\u8981\u6c421~n\u7684\u548c\uff0c\u7531\u4e8en\u4e0d\u786e\u5b9a\u662f\u591a\u5c11\uff0c\u6240\u4ee5\u5c31\u628an\u5199\u6210\u5f62\u5f0f\u53c2\u6570\uff0cn\u7684\u5177\u4f53\u503c\u7531\u8c03\u7528\u8005\u6307\u5b9a\u3002\n    \u5728\u65b9\u6cd5\u4e2d\u628an\u5f53\u505a\u4e00\u4e2a\u786e\u5b9a\u7684\u6570\u636e\u6765\u4f7f\u7528\u5c31\u884c\u3002\n*\/\npublic static int add(int n){\n    int sum = 0;\n    for (int i = 1; i <= n; i++) {\n        \/\/ i = 1 2 3 ... n\n        sum += i;\n    }\n    return sum;\n}\n\npublic static void main(String[] args) {\n    int rs = add(5);\n    System.out.println("1-5\u7684\u548c\u662f\uff1a" + rs); \/\/15\n    int rs = add(6);\n    System.out.println("1-6\u7684\u548c\u662f\uff1a" + rs); \/\/21\n}<\/code><\/pre>\n
            4.2 \u5224\u65ad\u5947\u5076<\/h3>\n
            \/*\n\u5206\u6790\uff1a\n    \u9700\u6c42\u4e2d\uff0c\u662f\u8981\u5224\u65ad\u4e00\u4e2a\u6570\u662f\u5947\u6570\u8fd8\u662f\u5076\u6570\uff0c\u4f46\u662f\u5e76\u6ca1\u6709\u660e\u786e\u8bf4\uff0c\u662f\u54ea\u4e00\u4e2a\u6570\u3002\n    \u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e2a\u6570\u53ef\u80fd\u662f\u5947\u6570\uff0c\u4e5f\u53ef\u4ee5\u80fd\u662f\u5076\u6570\uff0c\u662f\u4e00\u4e2a\u80fd\u591f\u53d8\u5316\u7684\u6570\u3002\n    \u628a\u8fd9\u4e2a\u6570\u5199\u6210\u65b9\u6cd5\u7684\u5f62\u5f0f\u53c2\u6570\uff0c\u5c31\u53ef\u4ee5\u8fbe\u5230\u8fd9\u4e2a\u76ee\u7684\u3002\u56e0\u4e3a\u8c03\u7528\u65b9\u6cd5\u65f6\uff0c\u8c03\u7528\u8005\u53ef\u4ee5\u7ed9\u4f20\u9012     \u5947\u6570\uff0c\u4e5f\u53ef\u4ee5\u4f20\u9012\u5076\u6570\u3002\n*\/\npublic static void judge(int number){\n    if(number % 2 == 0){\n        System.out.println(number + "\u662f\u4e00\u4e2a\u5076\u6570\uff01");\n    }else {\n        System.out.println(number + "\u662f\u4e00\u4e2a\u5947\u6570\uff01");\n    }\n}\n\npublic static void main(String[] args) {\n    judge(7); \/\/\u8c03\u7528\u540e\u6253\u5370\uff1a7\u662f\u4e00\u4e2a\u5947\u6570\n    judge(8); \/\/\u8c03\u7528\u540e\u6253\u5370\uff1a8\u662f\u4e00\u4e2a\u5076\u6570\n}<\/code><\/pre>\n
            \u4e94\u3001\u65b9\u6cd5\u6267\u884c\u539f\u7406<\/h2>\n
            \u6bcf\u6b21\u8c03\u7528\u65b9\u6cd5\uff0c\u65b9\u6cd5\u90fd\u4f1a\u8fdb\u6808\u6267\u884c\uff1b\u6267\u884c\u5b8c\u540e\uff0c\u53c8\u4f1a\u5f39\u6808\u51fa\u53bb<\/p>\n
            \u5047\u8bbe\u5728main\u65b9\u6cd5\u4e2d\u4f9d\u6b21\u8c03\u7528A\u65b9\u6cd5\u3001B\u65b9\u6cd5\u3001C\u65b9\u6cd5\uff0c\u5728\u5185\u5b58\u4e2d\u7684\u6267\u884c\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n
            1\uff09\u6bcf\u6b21\u8c03\u7528\u65b9\u6cd5\uff0c\u65b9\u6cd5\u90fd\u4f1a\u4ece\u6808\u9876\u538b\u6808\u6267\u884c\u6ca1\u6267\u884c<\/p>\n
            2\uff09\u6bcf\u4e2a\u65b9\u6cd5\u6267\u884c\u5b8c\u540e\uff0c\u4f1a\u4ece\u6808\u9876\u5f39\u6808\u51fa\u53bb<\/p>\n
            \"image-20231116092255436\"<\/div><\/p>\n
            5.1 \u6709\u8fd4\u56de\u503c\u7684\u5185\u5b58\u5206\u6790<\/h3>\n
            \u4e3e\u4f8b\uff1a<\/p>\n
            public class MethodDemo {\n    public static void main(String[] args) {\n        int rs = sum(10, 20);\n        System.out.println(rs);\n    }\n    public static int sum(int a, int b ){\n        int c = a + b; \n        return c;  \n    }\n}<\/code><\/pre>\n
            \"image-20231116092439137\"<\/div><\/p>\n
            5.2 \u65e0\u8fd4\u56de\u503c\u7684\u5185\u5b58\u5206\u6790<\/h3>\n
            \u4e3e\u4f8b\uff1a<\/p>\n
            public class Demo2Method {\n    public static void main(String[] args) {\n        study();\n    }\n    public static void study(){\n        eat();\n        System.out.println("\u5b66\u4e60");\n        sleep();\n    }\n    public static void eat(){\n        System.out.println("\u5403\u996d");\n    }\n\n    public static void sleep(){\n        System.out.println("\u7761\u89c9");\n    }\n}<\/code><\/pre>\n
            \"image-20231116092712389\"<\/div><\/p>\n
            1\uff09\u65b9\u6cd5\u7684\u8fd0\u884c\u533a\u57df\u5728\u54ea\u91cc\uff1f
            \n\u7b54\uff1a\u6808\u5185\u5b58\u3002
            \n2\uff09\u6808\u6709\u4ec0\u4e48\u7279\u70b9\uff1f\u65b9\u6cd5\u4e3a\u4ec0\u4e48\u8981\u5728\u6808\u4e2d\u8fd0\u884c\u81ea\u5df1\uff1f
            \n\u7b54\uff1a\u5148\u8fdb\u540e\u51fa\u3002\u4fdd\u8bc1\u4e00\u4e2a\u65b9\u6cd5\u8c03\u7528\u5b8c\u53e6\u4e00\u4e2a\u65b9\u6cd5\u540e\uff0c\u53ef\u4ee5\u56de\u6765\u7ee7\u7eed\u6267\u884c\u3002<\/p>\n
            \u516d\u3001\u65b9\u6cd5\u53c2\u6570\u7684\u4f20\u9012\u673a\u5236<\/h2>\n
            Java\u7684\u53c2\u6570\u4f20\u9012\u673a\u5236\u90fd\u662f\uff1a\u503c\u4f20\u9012\uff1a\u5728\u4f20\u9012\u5b9e\u53c2\u7ed9\u65b9\u6cd5\u7684\u5f62\u53c2\u7684\u65f6\u5019\uff0c\u4f20\u9012\u7684\u662f\u5b9e\u53c2\u53d8\u91cf\u4e2d\u5b58\u50a8\u7684\u503c\u7684\u526f\u672c<\/p>\n
            6.1 \u53c2\u6570\u4f20\u9012\u7684\u662f\u57fa\u672c\u7c7b\u578b\u6570\u636e<\/h3>\n
            \"image-20231116110219508\"<\/div><\/p>\n
            6.2 \u53c2\u6570\u4f20\u9012\u7684\u662f\u5f15\u7528\u6570\u636e\u7c7b\u578b<\/h3>\n
            \"image-20231116144927960\"<\/div><\/p>\n
            \u5b9e\u9645\u4e0a\u4e5f\u662f\u503c\u4f20\u9012\uff0c\u53ea\u4e0d\u8fc7\u53c2\u6570\u4f20\u9012\u5b58\u50a8\u7684\u5730\u5740\u503c<\/p>\n
            \u4e03\u3001\u4e3e\u4f8b<\/h2>\n
            7.1 \u4e3e\u4f8b<\/h3>\n
            \u9700\u6c42\uff1a\u8f93\u51fa\u4e00\u4e2aint\u7c7b\u578b\u7684\u6570\u7ec4\u5185\u5bb9\uff0c\u8981\u6c42\u8f93\u51fa\u683c\u5f0f\u4e3a\uff1a[11, 22, 33, 44, 55]\u3002<\/p>\n
            public class MethodTest3 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u5b8c\u6210\u6253\u5370int\u7c7b\u578b\u7684\u6570\u7ec4\u5185\u5bb9\u3002\n        int[] arr = {10, 30, 50, 70};\n        printArray(arr);\n\n        int[] arr2 = null;\n        printArray(arr2);\n\n        int[] arr3 = {};\n        printArray(arr3);\n    }\n\n    \/*\n        \u53c2\u6570\uff1aint[] arr\u8868\u793a\u8981\u88ab\u6253\u5370\u5143\u7d20\u7684\u6570\u7ec4\uff0c\u9700\u8981\u8c03\u7528\u8005\u4f20\u9012\n    *\/\n    public static void printArray(int[] arr){\n        if(arr == null){\n            System.out.println(arr); \/\/ null\n            return; \/\/ \u8df3\u51fa\u5f53\u524d\u65b9\u6cd5\n        }\n\n        System.out.print("[");\n        \/\/ \u76f4\u63a5\u904d\u5386\u63a5\u5230\u7684\u6570\u7ec4\u5143\u7d20\n        for (int i = 0; i < arr.length; i++) {\n            if(i == arr.length - 1){\n                System.out.print(arr[i]);\n            }else {\n                System.out.print(arr[i] + ", ");\n            }\n        }\n        System.out.println("]");\n    }\n\n}<\/code><\/pre>\n
            7.2 \u4e3e\u4f8b<\/h3>\n
            \u9700\u6c42\uff1a\u6bd4\u8f83\u4e24\u4e2aint\u7c7b\u578b\u7684\u6570\u7ec4\u662f\u5426\u4e00\u6837\uff0c\u8fd4\u56detrue\u6216\u8005false<\/p>\n
            public class MethodTest4 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u5b8c\u6210\u5224\u65ad\u4e24\u4e2aint\u7c7b\u578b\u7684\u6570\u7ec4\u662f\u5426\u4e00\u6837\u3002\n        int[] arr1 = {10, 20, 30};\n        int[] arr2 = {10, 20, 30};\n        System.out.println(equals(arr1, arr2));\n    }\n    \/*\n        \u53c2\u6570\uff1a\n            int[] arr1, \u53c2\u4e0e\u6bd4\u8f83\u7684\u7b2c\u4e00\u4e2aint\u6570\u7ec4\n            int[] arr2  \u53c2\u4e0e\u6bd4\u8f83\u7684\u7b2c\u4e8c\u4e2aint\u6570\u7ec4\n        \u8fd4\u56de\u503c:\n            \u8fd4\u56de\u6bd4\u8f83\u7684\u7ed3\u679ctrue\u6216\u8005false\n    *\/\n    public static boolean equals(int[] arr1, int[] arr2){\n        \/\/ 1\u3001\u5224\u65adarr1\u548carr2\u662f\u5426\u90fd\u662fnull.\n        if(arr1 == null && arr2 == null){\n            return true; \/\/ \u76f8\u7b49\u7684\n        }\n        \/\/ 2\u3001\u5224\u65adarr1\u662fnull\uff0c\u6216\u8005arr2\u662fnull.\n        if(arr1 == null || arr2 == null) {\n            return false; \/\/ \u4e0d\u76f8\u7b49\n        }\n        \/\/ 3\u3001\u5224\u65ad2\u4e2a\u6570\u7ec4\u7684\u957f\u5ea6\u662f\u5426\u4e00\u6837\uff0c\u5982\u679c\u957f\u5ea6\u4e0d\u4e00\u6837\uff0c\u76f4\u63a5\u8fd4\u56defalse.\n        if(arr1.length != arr2.length){\n            return false; \/\/ \u4e0d\u76f8\u7b49\n        }\n        \/\/ 4\u3001\u4e24\u4e2a\u6570\u7ec4\u7684\u957f\u5ea6\u662f\u4e00\u6837\u7684\uff0c\u63a5\u7740\u6bd4\u8f83\u5b83\u4eec\u7684\u5185\u5bb9\u662f\u5426\u4e00\u6837\u3002\n        \/\/ arr1 = [10, 20, 30]\n        \/\/ arr2 = [10, 20, 30]\n        for (int i = 0; i < arr1.length; i++) {\n            \/\/ \u5224\u65ad\u5f53\u524d\u4f4d\u7f6e2\u4e2a\u6570\u7ec4\u7684\u5143\u7d20\u662f\u5426\u4e0d\u4e00\u6837\uff0c\u4e0d\u4e00\u6837\u76f4\u63a5\u8fd4\u56defalse\n            if(arr1[i] != arr2[i]){\n                return false; \/\/ \u4e0d\u76f8\u7b49\u7684\n            }\n        }\n        return true; \/\/ \u4e24\u4e2a\u6570\u7ec4\u662f\u4e00\u6837\u7684\u3002\n    }\n}<\/code><\/pre>\n
            \u516b\u3001\u65b9\u6cd5\u91cd\u8f7d<\/h2>\n
            \u4e00\u4e2a\u7c7b\u4e2d\uff0c\u51fa\u73b0\u591a\u4e2a\u76f8\u540c\u7684\u65b9\u6cd5\u540d\uff0c\u4f46\u662f\u5b83\u4eec\u7684\u5f62\u53c2\u5217\u8868\u662f\u4e0d\u540c\u7684\uff0c\u90a3\u4e48\u8fd9\u4e9b\u65b9\u6cd5\u5c31\u79f0\u4e3a\u65b9\u6cd5\u91cd\u8f7d<\/p>\n
            \u4e3e\u4f8b\uff1a<\/p>\n
            \u9700\u6c42\uff1a\u5f00\u53d1\u6b66\u5668\u7cfb\u7edf\uff0c\u529f\u80fd\u9700\u6c42\u5982\u4e0b\uff1a\n    \u53ef\u4ee5\u9ed8\u8ba4\u53d1\u4e00\u679a\u6b66\u5668\u3002\n    \u53ef\u4ee5\u6307\u5b9a\u5730\u533a\u53d1\u5c04\u4e00\u679a\u6b66\u5668\u3002\n    \u53ef\u4ee5\u6307\u5b9a\u5730\u533a\u53d1\u5c04\u591a\u679a\u6b66\u5668\u3002<\/code><\/pre>\n
            public class MethodTest2 {\n    public static void main(String[] args) {\n        \/\/ \u76ee\u6807\uff1a\u638c\u63e1\u65b9\u6cd5\u91cd\u8f7d\u7684\u5e94\u7528\u573a\u666f\u3002\n        fire();\n        fire("\u5c9b\u56fd2");\n        fire("\u7c73\u56fd", 999);\n    }\n    public static void fire(){\n        fire("\u5c9b\u56fd");\n    }\n    public static void fire(String country){\n        fire(country, 1);\n    }\n    public static void fire(String country, int number){\n        System.out.println("\u53d1\u5c04\u4e86" + number + "\u679a\u6b66\u5668\u7ed9" + country);\n    }\n}<\/code><\/pre>\n
            \u603b\u7ed3\uff1a<\/p>\n
            1.\u4ec0\u4e48\u662f\u65b9\u6cd5\u91cd\u8f7d\uff1f\n    \u7b54\uff1a\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u591a\u4e2a\u65b9\u6cd5\u7684\u540d\u79f0\u76f8\u540c\uff0c\u4f46\u5b83\u4eec\u5f62\u53c2\u5217\u8868\u4e0d\u540c\u3002\n2.\u65b9\u6cd5\u91cd\u8f7d\u9700\u8981\u6ce8\u610f\u4ec0\u4e48\uff1f\n    - \u4e00\u4e2a\u7c7b\u4e2d\uff0c\u53ea\u8981\u4e00\u4e9b\u65b9\u6cd5\u7684\u540d\u79f0\u76f8\u540c\u3001\u5f62\u53c2\u5217\u8868\u4e0d\u540c\uff0c\u90a3\u4e48\u5b83\u4eec\u5c31\u662f\u65b9\u6cd5\u91cd\u8f7d\u4e86\uff0c\n      \u5176\u5b83\u7684\u90fd\u4e0d\u7ba1\uff08\u5982\uff1a\u4fee\u9970\u7b26\uff0c\u8fd4\u56de\u503c\u7c7b\u578b\u662f\u5426\u4e00\u6837\u90fd\u65e0\u6240\u8c13\uff09\u3002\n    - \u5f62\u53c2\u5217\u8868\u4e0d\u540c\u6307\u7684\u662f\uff1a\u5f62\u53c2\u7684\u4e2a\u6570\u3001\u7c7b\u578b\u3001\u987a\u5e8f\u4e0d\u540c\uff0c\u4e0d\u5173\u5fc3\u5f62\u53c2\u7684\u540d\u79f0\u3002\n3\u3001\u65b9\u6cd5\u91cd\u8f7d\u6709\u5565\u5e94\u7528\u573a\u666f\uff1f\n    \u7b54\uff1a\u5f00\u53d1\u4e2d\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u4e3a\u5904\u7406\u4e00\u7c7b\u4e1a\u52a1\uff0c\u63d0\u4f9b\u591a\u79cd\u89e3\u51b3\u65b9\u6848\uff0c\u6b64\u65f6\u7528\u65b9\u6cd5\u91cd\u8f7d\u6765\u8bbe\u8ba1\u662f\u5f88\u4e13\u4e1a\u7684\u3002<\/code><\/pre>\n
            \u4e5d\u3001return\u5355\u72ec\u4f7f\u7528<\/h2>\n
            \u5728\u65b9\u6cd5\u4e2d\u5355\u72ec\u4f7f\u7528return\u8bed\u53e5\uff0c\u53ef\u4ee5\u7528\u6765\u63d0\u524d\u7ed3\u675f\u65b9\u6cd5\u7684\u6267\u884c<\/p>\n
            \u4e3e\u4f8b\uff1a<\/p>\n
            public class Test {\n    public static void main(String[] args) {\n        System.out.println("\u5f00\u59cb");\n        chu(10 , 0);\n        System.out.println("\u7ed3\u675f");\n    }\n    public static void chu(int a , int b){\n        if(b == 0){\n            System.err.println(\u201c\u60a8\u7684\u6570\u636e\u6709\u8bef\uff01\uff01\u4e0d\u6267\u884c\uff01\uff01\u201d);\n            return; \/\/ \u76f4\u63a5\u8df3\u51fa\u5e76\u7ed3\u675f\u5f53\u524dchu\u65b9\u6cd5\u7684\u6267\u884c\n        }\n        int c = a \/ b;\n        System.out.println("\u9664\u6cd5\u7ed3\u679c\u662f\uff1a"+c); \n    }\n}<\/code><\/pre>\n
            \u7b2c\u516d\u90e8\u5206 \u7f16\u7a0b\u6848\u4f8b<\/h1>\n
            \u7b2c\u4e03\u90e8\u5206 \u9762\u5411\u5bf9\u8c61\u57fa\u7840<\/h1>\n
            \u4e00\u3001\u9762\u5411\u5bf9\u8c61\u5165\u95e8<\/h2>\n
            \u6570\u636e\u53ef\u4ee5\u653e\u5728\u4e00\u8d77\uff0c\u7ec4\u5408\u6210\u4e00\u4e2a\u5bf9\u8c61\uff0c\u7136\u540e\u8ba9\u5bf9\u8c61\u63d0\u4f9b\u65b9\u6cd5\u5bf9\u81ea\u5df1\u7684\u6570\u636e\u8fdb\u884c\u5904\u7406\u3002\u8fd9\u79cd\u65b9\u5f0f\u79f0\u4e4b\u4e3a\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b<\/p>\n
            \u6240\u8c13\u7f16\u5199\u5bf9\u8c61\u7f16\u7a0b\uff0c\u5c31\u662f\u628a\u8981\u5904\u7406\u7684\u6570\u636e\u4ea4\u7ed9\u5bf9\u8c61\uff0c\u8ba9\u5bf9\u8c61\u6765\u5904\u7406<\/strong><\/p>\n
            \u4e8c\u3001\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u597d\u5904<\/h2>\n
            2.1 \u597d\u5904<\/h3>\n
            \u9762\u5411\u5bf9\u8c61\u7684\u5f00\u53d1\u66f4\u7b26\u5408\u4eba\u7c7b\u7684\u601d\u7ef4\u4e60\u60ef\uff0c\u8ba9\u7f16\u7a0b\u53d8\u5f97\u66f4\u52a0\u7b80\u5355\u3001\u66f4\u52a0\u76f4\u89c2<\/p>\n
            2.2 \u5bf9\u8c61\u662f\u4ec0\u4e48<\/h3>\n
            \u5bf9\u8c61\u5b9e\u8d28\u4e0a\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5bf9\u8c61\u5176\u5b9e\u5c31\u662f\u4e00\u5f20\u6570\u636e\u8868\uff0c\u8868\u5f53\u4e2d\u8bb0\u5f55\u4ec0\u4e48\u6570\u636e\uff0c\u5bf9\u8c61\u5c31\u5904\u7406\u4ec0\u4e48\u6570\u636e<\/p>\n
            2.3 \u5bf9\u8c61\u600e\u4e48\u51fa\u6765\u7684<\/h3>\n
            \u7528\u4ec0\u4e48\u6765\u8bbe\u8ba1\u8fd9\u5f20\u8868\u5462\uff1f\u5c31\u662f\u7c7b\uff08class\uff09\uff0c\u7c7b\u53ef\u4ee5\u7406\u89e3\u6210\u5bf9\u8c61\u7684\u8bbe\u8ba1\u56fe\uff0c\u6216\u8005\u5bf9\u8c61\u7684\u6a21\u677f<\/strong><\/p>\n
            \u6211\u4eec\u9700\u8981\u6309\u7167\u5bf9\u8c61\u7684\u8bbe\u8ba1\u56fe\u521b\u9020\u4e00\u4e2a\u5bf9\u8c61\u3002\u8bbe\u8ba1\u56fe\u4e2d\u89c4\u5b9a\u6709\u54ea\u4e9b\u6570\u636e\uff0c\u5bf9\u8c61\u4e2d\u5c31\u53ea\u80fd\u6709\u54ea\u4e9b\u6570\u636e<\/p>\n
            \u5bf9\u8c61\u53ef\u4ee5\u7406\u89e3\u6210\u4e00\u5f20\u6570\u636e\u8868\uff0c\u800c\u6570\u636e\u8868\u4e2d\u53ef\u4ee5\u6709\u54ea\u4e9b\u6570\u636e\uff0c\u662f\u7531\u7c7b\u6765\u8bbe\u8ba1\u7684<\/p>\n
            \u4e09\u3001\u5bf9\u8c61\u5728\u8ba1\u7b97\u673a\u4e2d\u7684\u6267\u884c\u539f\u7406<\/h2>\n
            \u5176\u5b9eStudent s1 = new Student();<\/code>\u8fd9\u53e5\u8bdd\u4e2d\u7684\u539f\u7406\u5982\u4e0b<\/p>\n
              \n
            • \n
              Student s1<\/code>\u8868\u793a\u7684\u662f\u5728\u6808\u5185\u5b58\u4e2d\uff0c\u521b\u5efa\u4e86\u4e00\u4e2aStudent\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u53d8\u91cf\u540d\u4e3as1<\/p>\n<\/li>\n
            • \n
              \u800cnew Student()<\/code>\u4f1a\u5728\u5806\u5185\u5b58\u4e2d\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\uff0c\u800c\u5bf9\u8c61\u4e2d\u5305\u542b\u5b66\u751f\u7684\u5c5e\u6027\u540d\u548c\u5c5e\u6027\u503c<\/p>\n<\/li>\n
            • \n
              \u540c\u65f6\u7cfb\u7edf\u4f1a\u4e3a\u8fd9\u4e2aStudent\u5bf9\u8c61\u5206\u914d\u4e00\u4e2a\u5730\u5740\u503c0x4f3f5b24<\/p>\n<\/li>\n
            • \n
              \u63a5\u7740\u628a\u5bf9\u8c61\u7684\u5730\u5740\u8d4b\u503c\u7ed9\u6808\u5185\u5b58\u4e2d\u7684\u53d8\u91cfs1\uff0c\u901a\u8fc7s1\u8bb0\u5f55\u7684\u5730\u5740\u5c31\u53ef\u4ee5\u627e\u5230\u8fd9\u4e2a\u5bf9\u8c61<\/p>\n<\/li>\n
            • \n
              \u5f53\u6267\u884cs1.name=\u201c\u64ad\u599e\u201d<\/code>\u65f6\uff0c\u5176\u5b9e\u5c31\u662f\u901a\u8fc7s1\u627e\u5230\u5bf9\u8c61\u7684\u5730\u5740\uff0c\u518d\u901a\u8fc7\u5bf9\u8c61\u627e\u5230\u5bf9\u8c61\u7684name\u5c5e\u6027\uff0c\u518d\u7ed9\u5bf9\u8c61\u7684name\u5c5e\u6027\u8d4b\u503c\u4e3a\u64ad\u599e<\/code>;  <\/p>\n<\/li>\n<\/ul>\n
              \"image-20231117143040670\"<\/div><\/p>\n
              \u56db\u3001\u6ce8\u610f\u4e8b\u9879<\/h2>\n
              \"image-20231117143213293\"<\/div><\/p>\n
              \u7b2c\u4e00\u6761<\/strong>\uff1a\u4e00\u4e2a\u4ee3\u7801\u6587\u4ef6\u4e2d\uff0c\u53ef\u4ee5\u5199\u591a\u4e2aclass\u7c7b\uff0c\u4f46\u662f\u53ea\u80fd\u6709\u4e00\u4e2a\u662fpublic\u4fee\u9970\uff0c\u4e14public\u4fee\u9970\u7684\u7c7b\u5fc5\u987b\u548c\u6587\u4ef6\u540d\u76f8\u540c<\/p>\n
              \u5047\u8bbe\u6587\u4ef6\u540d\u4e3aDemo1.java<\/code>\uff0c\u8fd9\u4e2a\u6587\u4ef6\u4e2d\u5047\u8bbe\u6709\u4e24\u4e2a\u7c7bDemo1\u7c7b\u548cStudent\u7c7b<\/code>\uff0c\u4ee3\u7801\u5982\u4e0b<\/p>\n
              \/\/public\u4fee\u9970\u7684\u7c7bDemo1\uff0c\u548c\u6587\u4ef6\u540dDemo1\u76f8\u540c\npublic class Demo1{\n\n}\n\nclass Student{\n\n}<\/code><\/pre>\n
              \u7b2c\u4e8c\u6761\uff1a<\/strong>\u5bf9\u8c61\u4e0e\u5bf9\u8c61\u4e4b\u95f4\u7684\u6570\u636e\u4e0d\u4f1a\u76f8\u4e92\u5f71\u54cd\uff0c\u4f46\u662f\u591a\u4e2a\u53d8\u91cf\u6307\u5411\u540c\u4e00\u4e2a\u5bf9\u8c61\u4f1a\u76f8\u4e92\u5f71\u54cd\u3002<\/p>\n
              s1\u548cs2\u4e24\u4e2a\u53d8\u91cf\u5206\u522b\u8bb0\u5f55\u7684\u662f\u4e24\u4e2a\u5bf9\u8c61\u7684\u5730\u5740\u503c\uff0c\u5404\u81ea\u4fee\u6539\u5404\u81ea\u5c5e\u6027\u503c\uff0c\u662f\u4e92\u4e0d\u5f71\u54cd\u7684<\/p>\n
              \"image-20231117143447129\"<\/div><\/p>\n
              s1\u548cs2\u4e24\u4e2a\u53d8\u91cf\u8bb0\u5f55\u7684\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u7684\u5730\u5740\u503c\uff0cs1\u4fee\u6539\u5bf9\u8c61\u7684\u5c5e\u6027\u503c\uff0c\u518d\u7528s2\u8bbf\u95ee\u8fd9\u4e2a\u5c5e\u6027\uff0c\u4f1a\u53d1\u73b0\u5df2\u7ecf\u88ab\u4fee\u6539\u4e86<\/p>\n
              \"image-20231117143509146\"<\/div><\/p>\n
              \u4e94\u3001this\u5173\u952e\u5b57<\/h2>\n
              this\u5c31\u662f\u4e00\u4e2a\u53d8\u91cf\uff0c\u7528\u5728\u65b9\u6cd5\u4e2d\uff0c\u53ef\u4ee5\u62ff\u5230\u5f53\u524d\u7c7b\u7684\u5bf9\u8c61<\/p>\n
              \u901a\u8fc7this\u5728\u65b9\u6cd5\u4e2d\u53ef\u4ee5\u8bbf\u95ee\u672c\u7c7b\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf<\/p>\n
              \"image-20231117143710230\"<\/div><\/p>\n
              \u54ea\u4e00\u4e2a\u5bf9\u8c61\u8c03\u7528\u65b9\u6cd5\u65b9\u6cd5\u4e2d\u7684this\u5c31\u662f\u54ea\u4e00\u4e2a\u5bf9\u8c61<\/p>\n
              \u516d\u3001\u6784\u9020\u5668<\/h2>\n
              6.1 \u5b9a\u4e49<\/h3>\n
              \u6784\u9020\u5668\u5176\u5b9e\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u65b9\u6cd5\uff0c\u4f46\u662f\u8fd9\u4e2a\u65b9\u6cd5\u6ca1\u6709\u8fd4\u56de\u503c\u7c7b\u578b\uff0c\u65b9\u6cd5\u540d\u5fc5\u987b\u548c\u7c7b\u540d\u76f8\u540c<\/p>\n
              6.2 \u7279\u70b9<\/h3>\n
              \u5728\u521b\u5efa\u5bf9\u8c61\u65f6\uff0c\u4f1a\u8c03\u7528\u6784\u9020\u5668\u3002<\/p>\n
              \u4e5f\u5c31\u662f\u8bf4 new Student()<\/code>\u5c31\u662f\u5728\u6267\u884c\u6784\u9020\u5668\uff0c\u5f53\u6784\u9020\u5668\u6267\u884c\u5b8c\u4e86\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u5bf9\u8c61\u521b\u5efa\u6210\u529f\u3002 <\/p>\n
              \"image-20231117144236694\"<\/div><\/p>\n
              \u5f53\u6267\u884cnew Student("\u64ad\u4ed4",99)<\/code>\u521b\u5efa\u5bf9\u8c61\u65f6\uff0c\u5c31\u662f\u5728\u6267\u884c\u6709\u53c2\u6570\u6784\u9020\u5668\uff0c\u5f53\u6709\u53c2\u6570\u6784\u9020\u5668\u6267\u884c\u5b8c\uff0c\u5c31\u610f\u5473\u7740\u5bf9\u8c61\u521b\u5efa\u5b8c\u6bd5\u4e86\u3002<\/p>\n
              \"image-20231117144400394\"<\/div><\/p>\n
              new \u5bf9\u8c61\u5c31\u662f\u5728\u6267\u884c\u6784\u9020\u65b9\u6cd5<\/strong><\/p>\n
              6.3 \u5e94\u7528\u573a\u666f<\/h3>\n
              \u5176\u5b9e\u6784\u9020\u5668\u5c31\u662f\u7528\u6765\u521b\u5efa\u5bf9\u8c61\u7684\u3002\u53ef\u4ee5\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u7ed9\u5bf9\u8c61\u7684\u5c5e\u6027\u505a\u4e00\u4e9b\u521d\u59cb\u5316\u64cd\u4f5c<\/p>\n
              \"image-20231117144541102\"<\/div><\/p>\n
              6.4 \u6ce8\u610f\u4e8b\u9879<\/h3>\n
              1.\u5728\u8bbe\u8ba1\u4e00\u4e2a\u7c7b\u65f6\uff0c\u5982\u679c\u4e0d\u5199\u6784\u9020\u5668\uff0cJava\u4f1a\u81ea\u52a8\u751f\u6210\u4e00\u4e2a\u65e0\u53c2\u6570\u6784\u9020\u5668\u3002
              \n2.\u4e00\u5b9a\u5b9a\u4e49\u4e86\u6709\u53c2\u6570\u6784\u9020\u5668\uff0cJava\u5c31\u4e0d\u518d\u63d0\u4f9b\u7a7a\u53c2\u6570\u6784\u9020\u5668\uff0c\u6b64\u65f6\u5efa\u8bae\u81ea\u5df1\u52a0\u4e00\u4e2a\u65e0\u53c2\u6570\u6784\u9020\u5668\u3002<\/p>\n
              \u4e03\u3001\u5c01\u88c5\u6027<\/h2>\n
              7.1 \u5b9a\u4e49<\/h3>\n
              \u7528\u7c7b\u8bbe\u8ba1\u5bf9\u8c61\u5904\u7406\u67d0\u4e00\u4e2a\u4e8b\u7269\u7684\u6570\u636e\u65f6\uff0c\u5e94\u8be5\u628a\u8981\u5904\u7406\u7684\u6570\u636e\uff0c\u4ee5\u53ca\u5904\u7406\u6570\u636e\u7684\u65b9\u6cd5\uff0c\u90fd\u8bbe\u8ba1\u5230\u4e00\u4e2a\u5bf9\u8c61\u4e2d\u53bb<\/p>\n
              \u5c01\u88c5\u7684\u8bbe\u8ba1\u89c4\u8303\u75288\u4e2a\u5b57\u603b\u7ed3\uff0c\u5c31\u662f\uff1a\u5408\u7406\u9690\u85cf\u3001\u5408\u7406\u66b4\u9732<\/strong><\/p>\n
              7.2 \u5c01\u88c5\u5728\u4ee3\u7801\u4e2d\u7684\u4f53\u73b0<\/h3>\n
              \u7528\u5230\u4e00\u4e2a\u4fee\u9970\u7b26\uff0c\u53ebprivate\uff0c\u88abprivate\u4fee\u9970\u7684\u53d8\u91cf\u6216\u8005\u65b9\u6cd5\uff0c\u53ea\u80fd\u5728\u672c\u7c7b\u4e2d\u88ab\u8bbf\u95ee<\/p>\n
              private double score;<\/code> \u5c31\u76f8\u5f53\u4e8e\u628ascore\u53d8\u91cf\u5c01\u88c5\u5728\u4e86Student\u5bf9\u8c61\u7684\u5185\u90e8\uff0c\u4e14\u4e0d\u5bf9\u5916\u66b4\u9732\uff0c\u4f60\u60f3\u8981\u5728\u5176\u4ed6\u7c7b\u4e2d\u8bbf\u95eescore\u8fd9\u4e2a\u53d8\u91cf\u5c31\uff0c\u5c31\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u4e86\uff1b<\/p>\n
              \u5982\u679c\u4f60\u60f3\u7ed9Student\u5bf9\u8c61\u7684score\u5c5e\u6027\u8d4b\u503c\uff0c\u5f97\u8c03\u7528\u5bf9\u5916\u66b4\u9732\u7684\u65b9\u6cd5setScore(int score)<\/code>\uff0c\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\u53ef\u4ee5\u5bf9\u8c03\u7528\u8005\u4f20\u9012\u8fc7\u6765\u7684\u6570\u636e\u8fdb\u884c\u4e00\u4e9b\u63a7\u5236\uff0c\u66f4\u52a0\u5b89\u5168\u3002<\/p>\n
              \"image-20231117145322494\"<\/div><\/p>\n
              \u5f53\u4f60\u60f3\u83b7\u53d6socre\u53d8\u91cf\u7684\u503c\u65f6\uff0c\u5c31\u5f97\u8c03\u7528\u5bf9\u5916\u66b4\u9732\u7684\u53e6\u4e00\u4e2a\u65b9\u6cd5 getScore()<\/code> <\/p>\n
              \u516b\u3001\u5b9e\u4f53JavaBean<\/h2>\n
              8.1 \u4ec0\u4e48\u662f\u5b9e\u4f53\u7c7b<\/h3>\n
              \u4e00\u79cd\u7279\u6b8a\u7684\u7c7b\uff0c\u5b83\u9700\u8981\u6ee1\u8db3\u4e0b\u9762\u7684\u8981\u6c42<\/p>\n
              \"image-20231117145700038\"<\/div><\/p>\n
              \u6309\u7167\u8981\u6c42\uff0c\u5199\u4e00\u4e2aStudent\u5b9e\u4f53\u7c7b\uff1a<\/p>\n
              \"image-20231117145737935\"<\/div><\/p>\n
              8.2 \u5e94\u7528\u573a\u666f<\/h3>\n
              \u5b9e\u4f53\u7c7b\u4ec5\u4ec5\u53ea\u7528\u6765\u5c01\u88c5\u6570\u636e\uff0c\u800c\u5bf9\u6570\u636e\u7684\u5904\u7406\u4ea4\u7ed9\u5176\u4ed6\u7c7b\u6765\u5b8c\u6210\uff0c\u4ee5\u5b9e\u73b0\u6570\u636e\u548c\u6570\u636e\u4e1a\u52a1\u5904\u7406\u76f8\u5206\u79bb\u3002\u5982\u4e0b\u56fe\u6240\u793a<\/p>\n
              \"image-20231117145928621\"<\/div><\/p>\n
              \u5f00\u53d1\u4e2d\uff0c\u5c06\u7c7b\u4f5c\u4e3a\u4e00\u79cd\u6570\u636e\u7c7b\u578b\u4f7f\u7528\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff0c\u5728StudentOperator\u7c7b\u4e2d\uff0c\u5b9a\u4e49\u4e00\u4e2aStudent\u7c7b\u578b\u7684\u6210\u5458\u53d8\u91cfstudent\uff0c\u7136\u540e\u4f7f\u7528\u6784\u9020\u5668\u7ed9student\u6210\u5458\u53d8\u91cf\u8d4b\u503c\uff0c\u7136\u540e\u5728Student\u7684printPass()\u65b9\u6cd5\u4e2d\uff0c\u4f7f\u7528student\u8c03\u7528Student\u5bf9\u8c61\u7684\u65b9\u6cd5\uff0c\u5bf9Student\u5bf9\u8c61\u7684\u6570\u636e\u8fdb\u884c\u5904\u7406<\/p>\n
              \"image-20231117150131101\"<\/div><\/p>\n
              \u4e5d\u3001\u9762\u5411\u5bf9\u8c61\u7efc\u5408\u6848\u4f8b<\/h2>\n
              \u9700\u6c42\uff1a<\/p>\n
                \n
              1. \u60f3\u8981\u5c55\u793a\u7cfb\u7edf\u4e2d\u5168\u90e8\u7684\u7535\u5f71\u4fe1\u606f\uff08\u6bcf\u90e8\u7535\u5f71\uff1a\u7f16\u53f7\u3001\u540d\u79f0\u3001\u4ef7\u683c\uff09<\/li>\n
              2. \u5141\u8bb8\u7528\u6237\u6839\u636e\u7535\u5f71\u7684\u7f16\u53f7\uff08id\uff09\uff0c\u67e5\u8be2\u51fa\u67d0\u4e2a\u7535\u5f71\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/li>\n<\/ol>\n
                \"image-20231117151922388\"<\/div><\/p>\n
                9.1 \u7b2c\u4e00\u6b65\uff1a\u5b9a\u4e49\u7535\u5f71\u7c7b<\/h3>\n
                \u9996\u5148\u6bcf\u4e00\u90e8\u7535\u5f71\uff0c\u90fd\u5305\u542b\u8fd9\u90e8\u7535\u5f71\u7684\u76f8\u5173\u4fe1\u606f\uff0c\u6bd4\u5982\uff1a\u7535\u5f71\u7684\u7f16\u53f7\uff08id\uff09\u3001\u7535\u5f71\u7684\u540d\u79f0\uff08name\uff09\u3001\u7535\u5f71\u7684\u4ef7\u683c\uff08price\uff09\u3001\u7535\u5f71\u7684\u5206\u6570\uff08score\uff09\u3001\u7535\u5f71\u7684\u5bfc\u6f14\uff08director\uff09\u3001\u7535\u5f71\u7684\u4e3b\u6f14\uff08actor\uff09\u3001\u7535\u5f71\u7684\u7b80\u4ecb\uff08info\uff09\u3002 <\/p>\n
                \u4e3a\u4e86\u53bb\u63cf\u8ff0\u6bcf\u4e00\u90e8\u7535\u5f71\uff0c\u6709\u54ea\u4e9b\u4fe1\u606f\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbe\u8ba1\u4e00\u4e2a\u7535\u5f71\u7c7b\uff08Movie\uff09\uff0c\u7535\u5f71\u7c7b\u4ec5\u4ec5\u53ea\u662f\u4e3a\u4e86\u5c01\u88c5\u7535\u5f71\u7684\u4fe1\u606f\uff0c\u6240\u4ee5\u6309\u7167JavaBean\u7c7b\u7684\u6807\u51c6\u5199\u6cd5\u6765\u5199\u5c31\u884c<\/p>\n
                public class Movie {\n    private int id;\n    private String name;\n    private double price;\n    private double score;\n    private String director;\n    private String actor;\n    private String info;\n\n    public Movie() {\n    }\n\n    public Movie(int id, String name, double price, double score, String director, String actor, String info) {\n        this.id = id;\n        this.name = name;\n        this.price = price;\n        this.score = score;\n        this.director = director;\n        this.actor = actor;\n        this.info = info;\n    }\n\n    public int getId() {\n        return id;\n    }\n\n    public void setId(int id) {\n        this.id = id;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public double getPrice() {\n        return price;\n    }\n\n    public void setPrice(double price) {\n        this.price = price;\n    }\n\n    public double getScore() {\n        return score;\n    }\n\n    public void setScore(double score) {\n        this.score = score;\n    }\n\n    public String getDirector() {\n        return director;\n    }\n\n    public void setDirector(String director) {\n        this.director = director;\n    }\n\n    public String getActor() {\n        return actor;\n    }\n\n    public void setActor(String actor) {\n        this.actor = actor;\n    }\n\n    public String getInfo() {\n        return info;\n    }\n\n    public void setInfo(String info) {\n        this.info = info;\n    }\n\n}<\/code><\/pre>\n
                9.2 \u7b2c\u4e8c\u6b65\uff1a\u5b9a\u4e49\u7535\u5f71\u64cd\u4f5c\u7c7b<\/h3>\n
                \u524d\u9762\u6211\u4eec\u5b9a\u4e49\u7684Movie\u7c7b\uff0c\u4ec5\u4ec5\u53ea\u662f\u7528\u6765\u5c01\u88c5\u6bcf\u4e00\u90e8\u7535\u5f71\u7684\u4fe1\u606f\u3002\u4e3a\u4e86\u8ba9\u7535\u5f71\u6570\u636e\u548c\u7535\u5f71\u6570\u636e\u7684\u64cd\u4f5c\u76f8\u5206\u79bb\uff0c\u6211\u4eec\u8fd8\u5f97\u6709\u4e00\u4e2a\u7535\u5f71\u64cd\u4f5c\u7c7b\uff08MovieOperator\uff09\u3002<\/p>\n
                \u56e0\u4e3a\u7cfb\u7edf\u4e2d\u6709\u591a\u90e8\u7535\u5f71\uff0c\u6240\u4ee5\u7535\u5f71\u64cd\u4f5c\u7c7b\u4e2dMovieOperator\uff0c\u9700\u8981\u6709\u4e00\u4e2aMovie[] movies;<\/code> \u7528\u6765\u5b58\u50a8\u591a\u90e8\u7535\u5f71\u5bf9\u8c61\uff1b<\/p>\n
                \u540c\u65f6\u5728MovieOperator\u7c7b\u4e2d\uff0c\u63d0\u4f9b\u5bf9\u5916\u63d0\u4f9b\uff0c\u5bf9\u7535\u5f71\u6570\u7ec4\u8fdb\u884c\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002\u5982printAllMovies()<\/code>\u7528\u4e8e\u6253\u5370\u6570\u7ec4\u4e2d\u6240\u6709\u7684\u7535\u5f71\u4fe1\u606f\uff0csearchMovieById(int id)<\/code>\u65b9\u6cd5\u6839\u636eid\u67e5\u627e\u4e00\u4e2a\u7535\u5f71\u7684\u4fe1\u606f\u5e76\u6253\u5370\u3002<\/p>\n
                public class MovieOperator {\n    \/\/\u56e0\u4e3a\u7cfb\u7edf\u4e2d\u6709\u591a\u90e8\u7535\u5f71\uff0c\u6240\u4ee5\u7535\u5f71\u64cd\u4f5c\u7c7b\u4e2d\uff0c\u9700\u8981\u6709\u4e00\u4e2aMovie\u7684\u6570\u7ec4\n    private Movie[] movies;\n    public MovieOperator(Movie[] movies){\n        this.movies = movies;\n    }\n\n    \/** 1\u3001\u5c55\u793a\u7cfb\u7edf\u5168\u90e8\u7535\u5f71\u4fe1\u606f movies = [m1, m2, m3, ...]*\/\n    public void printAllMovies(){\n        System.out.println("-----\u7cfb\u7edf\u5168\u90e8\u7535\u5f71\u4fe1\u606f\u5982\u4e0b\uff1a-------");\n        for (int i = 0; i < movies.length; i++) {\n            Movie m = movies[i];\n            System.out.println("\u7f16\u53f7\uff1a" + m.getId());\n            System.out.println("\u540d\u79f0\uff1a" + m.getName());\n            System.out.println("\u4ef7\u683c\uff1a" + m.getPrice());\n            System.out.println("------------------------");\n        }\n    }\n\n    \/** 2\u3001\u6839\u636e\u7535\u5f71\u7684\u7f16\u53f7\u67e5\u8be2\u51fa\u8be5\u7535\u5f71\u7684\u8be6\u7ec6\u4fe1\u606f\u5e76\u5c55\u793a *\/\n    public void searchMovieById(int id){\n        for (int i = 0; i < movies.length; i++) {\n            Movie m = movies[i];\n            if(m.getId() == id){\n                System.out.println("\u8be5\u7535\u5f71\u8be6\u60c5\u5982\u4e0b\uff1a");\n                System.out.println("\u7f16\u53f7\uff1a" + m.getId());\n                System.out.println("\u540d\u79f0\uff1a" + m.getName());\n                System.out.println("\u4ef7\u683c\uff1a" + m.getPrice());\n                System.out.println("\u5f97\u5206\uff1a" + m.getScore());\n                System.out.println("\u5bfc\u6f14\uff1a" + m.getDirector());\n                System.out.println("\u4e3b\u6f14\uff1a" + m.getActor());\n                System.out.println("\u5176\u4ed6\u4fe1\u606f\uff1a" + m.getInfo());\n                return; \/\/ \u5df2\u7ecf\u627e\u5230\u4e86\u7535\u5f71\u4fe1\u606f\uff0c\u6ca1\u6709\u5fc5\u8981\u518d\u6267\u884c\u4e86\n            }\n        }\n        System.out.println("\u6ca1\u6709\u8be5\u7535\u5f71\u4fe1\u606f~");\n    }\n\n}<\/code><\/pre>\n
                9.3 \u7b2c\u4e09\u6b65\uff1a\u5b9a\u4e49\u6d4b\u8bd5\u7c7b<\/h3>\n
                \u6700\u540e\uff0c\u6211\u4eec\u9700\u8981\u5728\u6d4b\u8bd5\u7c7b\u4e2d\uff0c\u51c6\u5907\u597d\u6240\u6709\u7684\u7535\u5f71\u6570\u636e\uff0c\u5e76\u7528\u4e00\u4e2a\u6570\u7ec4\u4fdd\u5b58\u8d77\u6765\u3002\u6bcf\u4e00\u90e8\u7535\u5f71\u7684\u6570\u636e\u53ef\u4ee5\u5c01\u88c5\u6210\u4e00\u4e2a\u5bf9\u8c61\u3002\u7136\u540e\u628a\u5bf9\u8c61\u7528\u6570\u7ec4\u5b58\u8d77\u6765\u5373\u53ef\u3002<\/p>\n
                public class Test {\n    public static void main(String[] args) {\n        \/\/\u521b\u5efa\u4e00\u4e2aMovie\u7c7b\u578b\u7684\u6570\u7ec4\n        Movie[] movies = new Movie[4];\n        \/\/\u521b\u5efa4\u4e2a\u7535\u5f71\u5bf9\u8c61\uff0c\u5206\u522b\u5b58\u50a8\u5230movies\u6570\u7ec4\u4e2d\n        movies[0] = new Movie(1,"\u6c34\u95e8\u6865", 38.9, 9.8, "\u5f90\u514b", "\u5434\u4eac","12\u4e07\u4eba\u60f3\u770b");\n        movies[1] = new Movie(2, "\u51fa\u62f3\u5427", 39, 7.8, "\u5510\u6653\u767d", "\u7530\u96e8","3.5\u4e07\u4eba\u60f3\u770b");\n        movies[2] = new Movie(3,"\u6708\u7403\u9668\u843d", 42, 7.9, "\u7f57\u5170", "\u8d1d\u745e","17.9\u4e07\u4eba\u60f3\u770b");\n        movies[3] = new Movie(4,"\u4e00\u70b9\u5c31\u5230\u5bb6", 35, 8.7, "\u8bb8\u5b8f\u5b87", "\u5218\u660a\u7136","10.8\u4e07\u4eba\u60f3\u770b");\n\n    }\n\n}<\/code><\/pre>\n
                \u51c6\u5907\u597d\u6d4b\u8bd5\u6570\u636e\u4e4b\u540e\uff0c\u63a5\u4e0b\u6765\u5c31\u9700\u8981\u5bf9\u7535\u5f71\u6570\u636e\u8fdb\u884c\u64cd\u4f5c\u3002\u6211\u4eec\u5df2\u7ecf\u628a\u5bf9\u7535\u5f71\u64cd\u4f5c\u5148\u5173\u7684\u529f\u80fd\u5199\u5230\u4e86MovieOperator\u7c7b\u4e2d\uff0c\u6240\u4ee5\u63a5\u4e0b\u6765\uff0c\u521b\u5efaMovieOperator\u7c7b\u5bf9\u8c61\uff0c\u8c03\u7528\u65b9\u6cd5\u5c31\u53ef\u4ee5\u5b8c\u6210\u76f8\u5173\u529f\u80fd\u3002<\/p>\n
                import java.util.Scanner;\n\npublic class Test {\n    public static void main(String[] args) {\n        \/\/\u521b\u5efa\u4e00\u4e2aMovie\u7c7b\u578b\u7684\u6570\u7ec4\n        Movie[] movies = new Movie[4];\n        \/\/\u521b\u5efa4\u4e2a\u7535\u5f71\u5bf9\u8c61\uff0c\u5206\u522b\u5b58\u50a8\u5230movies\u6570\u7ec4\u4e2d\n        movies[0] = new Movie(1,"\u6c34\u95e8\u6865", 38.9, 9.8, "\u5f90\u514b", "\u5434\u4eac","12\u4e07\u4eba\u60f3\u770b");\n        movies[1] = new Movie(2, "\u51fa\u62f3\u5427", 39, 7.8, "\u5510\u6653\u767d", "\u7530\u96e8","3.5\u4e07\u4eba\u60f3\u770b");\n        movies[2] = new Movie(3,"\u6708\u7403\u9668\u843d", 42, 7.9, "\u7f57\u5170", "\u8d1d\u745e","17.9\u4e07\u4eba\u60f3\u770b");\n        movies[3] = new Movie(4,"\u4e00\u70b9\u5c31\u5230\u5bb6", 35, 8.7, "\u8bb8\u5b8f\u5b87", "\u5218\u660a\u7136","10.8\u4e07\u4eba\u60f3\u770b");\n        MovieOperator operator = new MovieOperator(movies);\n        Scanner sc = new Scanner(System.in);\n        while (true) {\n            System.out.println("==\u7535\u5f71\u4fe1\u606f\u7cfb\u7edf==");\n            System.out.println("1\u3001\u67e5\u8be2\u5168\u90e8\u7535\u5f71\u4fe1\u606f");\n            System.out.println("2\u3001\u6839\u636eid\u67e5\u8be2\u67d0\u4e2a\u7535\u5f71\u7684\u8be6\u7ec6\u4fe1\u606f\u5c55\u793a");\n            System.out.println("\u8bf7\u60a8\u8f93\u5165\u64cd\u4f5c\u547d\u4ee4\uff1a");\n            int command = sc.nextInt();\n            switch (command) {\n                case 1:\n                    \/\/ \u5c55\u793a\u5168\u90e8\u7535\u5f71\u4fe1\u606f\n                    operator.printAllMovies();\n                    break;\n                case 2:\n                    \/\/ \u6839\u636eid\u67e5\u8be2\u67d0\u4e2a\u7535\u5f71\u7684\u8be6\u7ec6\u4fe1\u606f\u5c55\u793a\n                    System.out.println("\u8bf7\u60a8\u8f93\u5165\u67e5\u8be2\u7684\u7535\u5f71id:");\n                    int id = sc.nextInt();\n                    operator.searchMovieById(id);\n                    break;\n                default:\n                    System.out.println("\u60a8\u8f93\u5165\u7684\u547d\u4ee4\u6709\u95ee\u9898~~");\n            }\n        }\n    }\n\n}<\/code><\/pre>\n
                \u5341\u3001\u6210\u5458\u53d8\u91cf\u548c\u5c40\u90e8\u53d8\u91cf<\/h2>\n
                \"image-20231117152244738\"<\/div><\/p>\n
                \u6210\u5458\u53d8\u91cf\u5728\u7c7b\u4e2d\u65b9\u6cd5\u5916\uff0c\u800c\u5c40\u90e8\u53d8\u91cf\u5728\u65b9\u6cd5\u4e2d<\/p>\n
                \"image-20231117152301169\"<\/div><\/p>\n
                \u9762\u5411\u5bf9\u8c61\u7684\u6838\u5fc3\u70b9\u5c31\u662f\u5c01\u88c5\uff0c\u5c06\u6570\u636e\u548c\u6570\u636e\u7684\u5904\u7406\u65b9\u5f0f\uff0c\u90fd\u5c01\u88c5\u5230\u5bf9\u8c61\u4e2d\uff1b \u81f3\u4e8e\u5bf9\u8c61\u8981\u5c01\u88c5\u54ea\u4e9b\u6570\u636e\uff1f\u5bf9\u6570\u636e\u8fdb\u884c\u600e\u6837\u7684\u5904\u7406\uff1f \u9700\u8981\u901a\u8fc7\u7c7b\u6765\u8bbe\u8ba1<\/p>\n
                \u7b2c\u516b\u90e8\u5206 Java\u5e38\u7528API<\/h1>\n
                \u4e00\u3001API\u6982\u8ff0<\/h2>\n
                API\uff08\u5168\u79f0\u662fApplication Program Interface \u5e94\u7528\u7a0b\u5e8f\u63a5\u53e3\uff09\uff0c\u8bf4\u4eba\u8bdd\u5c31\u662f\uff1a**\u522b\u4eba\u5199\u597d\u7684\u4e00\u4e9b\u7a0b\u5e8f\uff0c\u7ed9\u54b1\u4eec\u7a0b\u5e8f\u5458\u76f4\u63a5\u62ff\u53bb\u8c03\u7528<\/p>\n
                \u6bd4\u5982String\u7c7b\uff0c\u8868\u793a\u5b57\u7b26\u4e32\uff0c\u63d0\u4f9b\u7684\u65b9\u6cd5\u5168\u90fd\u662f\u5bf9\u5b57\u7b26\u4e32\u64cd\u4f5c\u7684\u3002<\/p>\n
                \u6bd4\u5982ArrayList\u7c7b\uff0c\u8868\u793a\u4e00\u4e2a\u5bb9\u5668\uff0c\u63d0\u4f9b\u7684\u65b9\u6cd5\u90fd\u662f\u5bf9\u5bb9\u5668\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u64cd\u4f5c\u7684<\/p>\n
                \u4e8c\u3001\u5305<\/h2>\n
                \u5305\u5176\u5b9e\u7c7b\u4f3c\u4e8e\u6587\u4ef6\u5939\uff0c\u4e00\u4e2a\u5305\u4e2d\u53ef\u4ee5\u653e\u591a\u4e2a\u7c7b\u6587\u4ef6<\/p>\n
                \u683c\u5f0f\uff1a<\/p>\n
                \/\/\u7c7b\u6587\u4ef6\u7684\u7b2c\u4e00\u884c\u5b9a\u4e49\u5305\npackage com.itheima.javabean;\n\npublic class \u7c7b\u540d{\n\n}<\/code><\/pre>\n
                \u6ce8\u610f\uff1a<\/p>\n
                  \n
                • \n
                  \u8981\u8c03\u7528\u81ea\u5df1\u6240\u5728\u5305\u4e0b\u7684\u5176\u4ed6\u7a0b\u5e8f\uff0c\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\u3002\uff08\u540c\u4e00\u4e2a\u5305\u4e0b\u7684\u7c7b\uff0c\u4e92\u76f8\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\uff09<\/p>\n<\/li>\n
                • \n
                  \u8981\u8c03\u7528\u5176\u4ed6\u5305\u4e0b\u7684\u7a0b\u5e8f\uff0c\u5219\u5fc5\u987b\u5728\u5f53\u524d\u7a0b\u5e8f\u4e2d\u5bfc\u5305, \u624d\u53ef\u4ee5\u8bbf\u95ee\uff01<\/p>\n<\/li>\n
                • \n
                  \u5bfc\u5305\u683c\u5f0f\uff1a import \u5305\u540d.\u7c7b\u540d<\/code><\/p>\n<\/li>\n
                • \n
                  \u8981\u8c03\u7528Java.lang\u5305\u4e0b\u7684\u7a0b\u5e8f\uff0c\u4e0d\u9700\u8981\u6211\u4eec\u5bfc\u5305\u7684\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u3002<\/p>\n<\/li>\n
                • \n
                  \u8981\u8c03\u7528\u591a\u4e2a\u4e0d\u540c\u5305\u4e0b\u7684\u7a0b\u5e8f\uff0c\u800c\u8fd9\u4e9b\u7a0b\u5e8f\u540d\u6b63\u597d\u4e00\u6837\uff0c\u6b64\u65f6\u9ed8\u8ba4\u53ea\u80fd\u5bfc\u5165\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u53e6\u4e00\u4e2a\u7a0b\u5e8f\u5fc5\u987b\u5e26\u5305\u540d\u8bbf\u95ee\u3002<\/p>\n<\/li>\n<\/ul>\n
                  \u4e09\u3001String\u7c7b<\/h2>\n
                  3.1 \u6982\u8ff0<\/h3>\n
                  Java\u4e3a\u4e86\u65b9\u4fbf\u6211\u4eec\u5904\u7406\u5b57\u7b26\u4e32\uff0c\u6240\u4ee5\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u4e00\u4e2aString\u7c7b\u6765\u4ee3\u8868\u5b57\u7b26\u4e32\uff0c\u8fd9\u4e2a\u7c7b\u5c31\u662fjava.lang<\/code>\u5305\u4e0b<\/p>\n
                  \u6309\u7167\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u601d\u60f3\uff0c\u5bf9\u4e8e\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\uff0c\u53ea\u9700\u8981\u521b\u5efa\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u7528\u5b57\u7b26\u4e32\u5bf9\u8c61\u5c01\u88c5\u5b57\u7b26\u4e32\u6570\u636e\uff0c\u7136\u540e\u8c03\u7528String\u7c7b\u7684\u65b9\u6cd5\u5c31\u53ef\u4ee5\u4e86<\/p>\n
                  3.2 String\u521b\u5efa\u5bf9\u8c61<\/h3>\n
                  \u65b9\u5f0f\u4e00\uff1a<\/p>\n
                  String s1 = "abc"; \/\/\u8fd9\u91cc"abc"\u5c31\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u7528s1\u53d8\u91cf\u63a5\u6536\nString s2 = "\u9ed1\u9a6c\u7a0b\u5e8f\u5458"; \/\/\u8fd9\u91cc\u7684\u201c\u9ed1\u9a6c\u7a0b\u5e8f\u5458\u201d\u4e5f\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u7528s2\u53d8\u91cf\u63a5\u6536<\/code><\/pre>\n
                  \u65b9\u5f0f\u4e8c\uff1a\u7528String\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u521b\u5efaString\u7c7b\u7684\u5bf9\u8c61<\/p>\n
                  \"image-20231117153057127\"<\/div><\/p>\n
                  \/\/ 1\u3001\u76f4\u63a5\u53cc\u5f15\u53f7\u5f97\u5230\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u5c01\u88c5\u5b57\u7b26\u4e32\u6570\u636e\nString name = "\u9ed1\u9a6c666";\nSystem.out.println(name);\n\n\/\/ 2\u3001new String\u521b\u5efa\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u5e76\u8c03\u7528\u6784\u9020\u5668\u521d\u59cb\u5316\u5b57\u7b26\u4e32\nString rs1 = new String();\nSystem.out.println(rs1); \/\/ ""\n\nString rs2 = new String("itheima");\nSystem.out.println(rs2);\n\nchar[] chars = {'a', '\u9ed1', '\u9a6c'};\nString rs3 = new String(chars);\nSystem.out.println(rs3);\n\nbyte[] bytes = {97, 98, 99};\nString rs4 = new String(bytes);\nSystem.out.println(rs4);<\/code><\/pre>\n
                  3.3 String\u7c7b\u7684\u5e38\u7528\u65b9\u6cd5<\/h3>\n
                  \"image-20231117153750563\"<\/div><\/p>\n
                  \u4e3e\u4f8b\uff1a<\/p>\n
                  public class StringDemo2 {\n    public static void main(String[] args) {\n        \/\/\u76ee\u6807\uff1a\u5feb\u901f\u719f\u6089String\u63d0\u4f9b\u7684\u5904\u7406\u5b57\u7b26\u4e32\u7684\u5e38\u7528\u65b9\u6cd5\u3002\n        String s = "\u9ed1\u9a6cJava";\n        \/\/ 1\u3001\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\n        System.out.println(s.length());\n\n        \/\/ 2\u3001\u63d0\u53d6\u5b57\u7b26\u4e32\u4e2d\u67d0\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5904\u7684\u5b57\u7b26\n        char c = s.charAt(1);\n        System.out.println(c);\n\n        \/\/ \u5b57\u7b26\u4e32\u7684\u904d\u5386\n        for (int i = 0; i < s.length(); i++) {\n            \/\/ i = 0 1 2 3 4 5\n            char ch = s.charAt(i);\n            System.out.println(ch);\n        }\n\n        System.out.println("-------------------");\n\n        \/\/ 3\u3001\u628a\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u5b57\u7b26\u6570\u7ec4\uff0c\u518d\u8fdb\u884c\u904d\u5386\n        char[] chars = s.toCharArray();\n        for (int i = 0; i < chars.length; i++) {\n            System.out.println(chars[i]);\n        }\n\n        \/\/ 4\u3001\u5224\u65ad\u5b57\u7b26\u4e32\u5185\u5bb9\uff0c\u5185\u5bb9\u4e00\u6837\u5c31\u8fd4\u56detrue\n        String s1 = new String("\u9ed1\u9a6c");\n        String s2 = new String("\u9ed1\u9a6c");\n        System.out.println(s1 == s2); \/\/ false\n        System.out.println(s1.equals(s2)); \/\/ true\n\n        \/\/ 5\u3001\u5ffd\u7565\u5927\u5c0f\u5199\u6bd4\u8f83\u5b57\u7b26\u4e32\u5185\u5bb9\n        String c1 = "34AeFG";\n        String c2 = "34aEfg";\n        System.out.println(c1.equals(c2)); \/\/ false\n        System.out.println(c1.equalsIgnoreCase(c2)); \/\/ true\n\n        \/\/ 6\u3001\u622a\u53d6\u5b57\u7b26\u4e32\u5185\u5bb9 (\u5305\u524d\u4e0d\u5305\u540e\u7684)\n        String s3 = "Java\u662f\u6700\u597d\u7684\u7f16\u7a0b\u8bed\u8a00\u4e4b\u4e00";\n        String rs = s3.substring(0, 8);\n        System.out.println(rs);\n\n        \/\/ 7\u3001\u4ece\u5f53\u524d\u7d22\u5f15\u4f4d\u7f6e\u4e00\u76f4\u622a\u53d6\u5230\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\n        String rs2 = s3.substring(5);\n        System.out.println(rs2);\n\n        \/\/ 8\u3001\u628a\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e2a\u5185\u5bb9\u66ff\u6362\u6210\u65b0\u5185\u5bb9\uff0c\u5e76\u8fd4\u56de\u65b0\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u7ed9\u6211\u4eec\n        String info = "\u8fd9\u4e2a\u7535\u5f71\u7b80\u76f4\u662f\u4e2a\u5783\u573e\uff0c\u5783\u573e\u7535\u5f71\uff01\uff01";\n        String rs3 = info.replace("\u5783\u573e", "**");\n        System.out.println(rs3);\n\n        \/\/ 9\u3001\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u5305\u542b\u67d0\u4e2a\u5173\u952e\u5b57\n        String info2 = "Java\u662f\u6700\u597d\u7684\u7f16\u7a0b\u8bed\u8a00\u4e4b\u4e00\uff0c\u6211\u7231Java,Java\u4e0d\u7231\u6211\uff01";\n        System.out.println(info2.contains("Java"));\n        System.out.println(info2.contains("java"));\n        System.out.println(info2.contains("Java2"));\n\n        \/\/ 10\u3001\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4ee5\u67d0\u4e2a\u5b57\u7b26\u4e32\u5f00\u5934\u3002\n        String rs4 = "\u5f20\u4e09\u4e30";\n        System.out.println(rs4.startsWith("\u5f20"));\n        System.out.println(rs4.startsWith("\u5f20\u4e09"));\n        System.out.println(rs4.startsWith("\u5f20\u4e092"));\n\n        \/\/ 11\u3001\u628a\u5b57\u7b26\u4e32\u6309\u7167\u67d0\u4e2a\u6307\u5b9a\u5185\u5bb9\u5206\u5272\u6210\u591a\u4e2a\u5b57\u7b26\u4e32\uff0c\u653e\u5230\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\u4e2d\u8fd4\u56de\u7ed9\u6211\u4eec\n        String rs5 = "\u5f20\u65e0\u5fcc,\u5468\u82b7\u82e5,\u6bb7\u7d20\u7d20,\u8d75\u654f";\n        String[] names = rs5.split(",");\n        for (int i = 0; i < names.length; i++) {\n            System.out.println(names[i]);\n        }\n    }\n\n}<\/code><\/pre>\n
                  3.4 \u6ce8\u610f\u4e8b\u9879<\/h3>\n
                  3.4.1 \u4e8b\u9879\u4e00<\/h4>\n
                  String\u7c7b\u7684\u5bf9\u8c61\u662f\u4e0d\u53ef\u53d8\u7684\u5bf9\u8c61<\/strong><\/p>\n
                  \u53ea\u8981\u662f\u4ee5\u201c\u201d<\/code>\u65b9\u5f0f\u5199\u51fa\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u4f1a\u5728\u5806\u5185\u5b58\u4e2d\u7684\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60<\/strong>\u4e2d\u5b58\u50a8<\/p>\n
                  \u6267\u884c\u7b2c\u4e00\u53e5\u8bdd\u65f6\uff0c\u4f1a\u5728\u5806\u5185\u5b58\u7684\u5e38\u91cf\u6c60\u4e2d\uff0c\u521b\u5efa\u4e00\u4e2a\u5b57\u7b26\u4e32\u5bf9\u8c61\u201c\u9ed1\u9a6c\u201d<\/code>\uff0c\u7136\u540e\u628a\u201c\u9ed1\u9a6c\u201d<\/code>\u7684\u5730\u5740\u8d4b\u503c\u7ed9String name<\/code><\/p>\n
                  \"image-20231117154602561\"<\/div>\u5f53\u6267\u884c\u7b2c\u4e8c\u53e5\u8bdd\u65f6\uff0c\u53c8\u4f1a\u518d\u5806\u5185\u5b58\u7684\u5e38\u91cf\u6c60\u4e2d\u521b\u5efa\u4e00\u4e2a\u5b57\u7b26\u4e32\u201c\u7a0b\u5e8f\u5458\u201d<\/code>\uff0c\u548c\u201c\u9ed1\u9a6c\u201d<\/code>\u62fc\u63a5\uff0c\u62fc\u63a5\u4e4b\u540e\u8fd8\u4f1a\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u201d\u9ed1\u9a6c\u7a0b\u5e8f\u5458\u201c<\/code>\uff0c\u7136\u540e\u5c06\u65b0\u4ea7\u751f\u7684\u201c\u9ed1\u9a6c\u7a0b\u5e8f\u5458\u201d<\/code>\u5bf9\u8c61\u7684\u5730\u5740\u8d4b\u503c\u7ed9String name<\/code>\u53d8\u91cf\u3002<\/p>\n
                  \"image-20231117154640050\"<\/div><\/p>\n
                  \u521b\u5efa\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\u201c\u9ed1\u9a6c\u201d<\/code>\u5185\u5bb9\u786e\u5b9e\u662f\u6ca1\u6709\u6539\u53d8\u7684\u3002\u6240\u4ee5\u8bf4String\u7684\u5bf9\u8c61\u662f\u4e0d\u53ef\u53d8\u7684<\/p>\n
                  3.4.2 \u4e8b\u9879\u4e8c<\/h4>\n
                  \u5b57\u7b26\u4e32\u5b57\u9762\u91cf\u548cnew\u51fa\u6765\u5b57\u7b26\u4e32\u7684\u533a\u522b<\/p>\n
                  \u53ea\u8981\u662f\u4ee5\u201c...\u201d<\/code>\u65b9\u5f0f\u5199\u51fa\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u4f1a\u5b58\u50a8\u5230\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\uff0c\u4e14\u76f8\u540c\u5185\u5bb9\u7684\u5b57\u7b26\u4e32\u53ea\u5b58\u50a8\u4e00\u4efd\u3002<\/p>\n
                  \"image-20231117155046037\"<\/div><\/p>\n
                  \u4f46\u901a\u8fc7new<\/code>\u65b9\u5f0f\u521b\u5efa\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u6bcfnew\u4e00\u6b21\u90fd\u4f1a\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u653e\u5728\u5806\u5185\u5b58\u4e2d\u3002<\/p>\n
                  \"image-20231117155052049\"<\/div><\/p>\n
                  3.5 String\u6848\u4f8b\u4e00\uff1a\u7528\u6237\u767b\u5f55<\/h3>\n
                  \u9700\u6c42\uff1a<\/p>\n
                  1.\u9996\u5148\uff0c\u4ece\u767b\u5f55\u754c\u9762\u4e0a\u53ef\u4ee5\u5f97\u51fa\uff0c\u9700\u8981\u8ba9\u7528\u6237\u8f93\u5165\u767b\u5f55\u540d\u548c\u5bc6\u7801\n2.\u8bbe\u8ba1\u4e00\u4e2a\u767b\u5f55\u65b9\u6cd5\uff0c\u5bf9\u7528\u6237\u540d\u548c\u5bc6\u7801\u8fdb\u884c\u6821\u9a8c\n3.\u8c03\u7528\u767b\u5f55\u65b9\u6cd5\uff0c\u6839\u636e\u65b9\u6cd5\u7684\u8fd4\u56de\u7ed3\u679c\uff0c\u5224\u65ad\u767b\u5f55\u662f\u5426\u6210\u529f\u3002\n4.\u5982\u679c\u767b\u5f55\u5931\u8d25\uff0c\u5faa\u73af\u767b\u5f553\u6b21\uff0c\u7ed3\u675f\u5faa\u73af\uff1b\u5982\u679c\u767b\u5f55\u6210\u529f\uff0c\u8df3\u51fa\u5faa\u73af;<\/code><\/pre>\n
                  \/**\n   \u76ee\u6807\uff1a\u5b8c\u6210\u7528\u6237\u7684\u767b\u5f55\u6848\u4f8b\u3002\n *\/\npublic class StringTest4 {\n    public static void main(String[] args) {\n        \/\/ 1\u3001\u5f00\u53d1\u4e00\u4e2a\u767b\u5f55\u754c\u9762\n        for (int i = 0; i < 3; i++) {\n            Scanner sc = new Scanner(System.in);\n            System.out.println("\u8bf7\u60a8\u8f93\u5165\u767b\u5f55\u540d\u79f0\uff1a");\n            String loginName = sc.next();\n            System.out.println("\u8bf7\u60a8\u8f93\u5165\u767b\u5f55\u5bc6\u7801\uff1a");\n            String passWord = sc.next();\n\n            \/\/ 5\u3001\u5f00\u59cb\u8c03\u7528\u767b\u5f55\u65b9\u6cd5\uff0c\u5224\u65ad\u662f\u5426\u767b\u5f55\u6210\u529f\n            boolean rs = login(loginName, passWord);\n            if(rs){\n                System.out.println("\u606d\u559c\u60a8\uff0c\u6b22\u8fce\u8fdb\u5165\u7cfb\u7edf~~");\n                break; \/\/ \u8df3\u51fafor\u5faa\u73af\uff0c\u4ee3\u8868\u767b\u5f55\u5b8c\u6210\n            }else {\n                System.out.println("\u767b\u5f55\u540d\u6216\u8005\u5bc6\u7801\u9519\u8bef\uff0c\u8bf7\u60a8\u786e\u8ba4~~");\n            }\n        }\n    }\n\n    \/**\n      2\u3001\u5f00\u53d1\u4e00\u4e2a\u767b\u5f55\u65b9\u6cd5\uff0c\u63a5\u6536\u7528\u6237\u7684\u767b\u5f55\u540d\u548c\u5bc6\u7801\uff0c\u8fd4\u56de\u8ba4\u8bc1\u7684\u7ed3\u679c\n     *\/\n    public static boolean login(String loginName, String passWord){\n        \/\/ 3\u3001\u51c6\u5907\u4e00\u4efd\u7cfb\u7edf\u6b63\u786e\u7684\u767b\u5f55\u540d\u548c\u5bc6\u7801\n        String okLoginName = "itheima";\n        String okPassWord = "123456";\n\n        \/\/ 4\u3001\u5f00\u59cb\u6b63\u5f0f\u5224\u65ad\u7528\u6237\u662f\u5426\u767b\u5f55\u6210\u529f\n        \/*if(okLoginName.equals(loginName) && okPassWord.equals(passWord)){\n            \/\/ \u767b\u5f55\u6210\u529f\u7684\n            return true;\n        }else {\n            return false;\n        }*\/\n        return okLoginName.equals(loginName) && okPassWord.equals(passWord);\n    }\n\n}<\/code><\/pre>\n
                  3.6 String\u6848\u4f8b\u4e8c\uff1a\u968f\u673a\u4ea7\u751f\u9a8c\u8bc1\u7801<\/h3>\n
                  \u6839\u636e\u9700\u6c42\u5206\u6790\uff0c\u6b65\u9aa4\u5982\u4e0b\uff1a\n    1.\u9996\u5148\uff0c\u8bbe\u8ba1\u4e00\u4e2a\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u63a5\u6536\u4e00\u4e2a\u6574\u578b\u53c2\u6570\uff0c\u6700\u7ec8\u8981\u8fd4\u56de\u5bf9\u5e94\u4f4d\u6570\u7684\u968f\u673a\u9a8c\u8bc1\u7801\u3002\n    2.\u65b9\u6cd5\u5185\u5b9a\u4e492\u4e2a\u5b57\u7b26\u4e32\u53d8\u91cf\uff1a\n        1\u4e2a\u7528\u6765\u8bb0\u4f4f\u751f\u6210\u7684\u9a8c\u8bc1\u7801\uff0c1\u4e2a\u7528\u6765\u8bb0\u4f4f\u8981\u7528\u5230\u7684\u5168\u90e8\u5b57\u7b26\u3002\n    3.\u5b9a\u4e49for\u5faa\u73af\u63a7\u5236\u751f\u6210\u591a\u5c11\u4f4d\u968f\u673a\u5b57\u7b26\n    4.\u6bcf\u6b21\u5f97\u5230\u4e00\u4e2a\u5b57\u7b26\u8303\u56f4\u5185\u7684\u968f\u673a\u7d22\u5f15\n    5.\u6839\u636e\u7d22\u5f15\u63d0\u53d6\u8be5\u5b57\u7b26\uff0c\u628a\u8be5\u5b57\u7b26\u4ea4\u7ed9code\u53d8\u91cf\u8fde\u63a5\u8d77\n    6.\u5faa\u73af\u7ed3\u675f\u540e\uff0c\u5728\u5faa\u73af\u5916\u8fd4\u56decode\u5373\u53ef\u3002\n    7.\u5728\u4e3b\u65b9\u6cd5\u4e2d\u8c03\u7528\u751f\u6210\u9a8c\u8bc1\u7801\u7684\u65b9\u6cd5<\/code><\/pre>\n
                  import java.util.Random;\n\/**\n    \u76ee\u6807\uff1a\u5b8c\u6210\u968f\u673a\u4ea7\u751f\u9a8c\u8bc1\u7801\uff0c\u9a8c\u8bc1\u7801\u7684\u6bcf\u4f4d\u53ef\u80fd\u662f\u6570\u5b57\u3001\u5927\u5199\u5b57\u6bcd\u3001\u5c0f\u5199\u5b57\u6bcd\n *\/\npublic class StringTest5 {\n    public static void main(String[] args) {\n        System.out.println(createCode(4));\n        System.out.println(createCode(6));\n    }\n    \/**\n       1\u3001\u8bbe\u8ba1\u4e00\u4e2a\u65b9\u6cd5\uff0c\u8fd4\u56de\u6307\u5b9a\u4f4d\u6570\u7684\u9a8c\u8bc1\u7801\n     *\/\n    public static String createCode(int n){\n        \/\/ 2\u3001\u5b9a\u4e492\u4e2a\u53d8\u91cf \n        \/\/\u4e00\u4e2a\u662f\u8bb0\u4f4f\u6700\u7ec8\u4ea7\u751f\u7684\u968f\u673a\u9a8c\u8bc1\u7801 \n        \/\/\u4e00\u4e2a\u662f\u8bb0\u4f4f\u53ef\u80fd\u7528\u5230\u7684\u5168\u90e8\u5b57\u7b26\n        String code = "";\n        String data = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";\n\n        Random r = new Random();\n        \/\/ 3\u3001\u5f00\u59cb\u5b9a\u4e49\u4e00\u4e2a\u5faa\u73af\u4ea7\u751f\u6bcf\u4f4d\u968f\u673a\u5b57\u7b26\n        for (int i = 0; i < n; i++) {\n            \/\/ 4\u3001\u968f\u673a\u4e00\u4e2a\u5b57\u7b26\u8303\u56f4\u5185\u7684\u7d22\u5f15\u3002\n            int index = r.nextInt(data.length());\n            \/\/ 5\u3001\u6839\u636e\u7d22\u5f15\u53bb\u5168\u90e8\u5b57\u7b26\u4e2d\u63d0\u53d6\u8be5\u5b57\u7b26\n            code += data.charAt(index); \/\/ code = code + \u5b57\u7b26\n        }\n        \/\/ 6\u3001\u8fd4\u56decode\u5373\u53ef\n        return code;\n    }\n\n}<\/code><\/pre>\n
                  \u9047\u5230\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u64cd\u4f5c\u7684\u9700\u6c42\uff0c\u4f18\u5148\u627eString\u7c7b\u6709\u6ca1\u6709\u63d0\u4f9b\u5bf9\u5e94\u7684\u65b9\u6cd5<\/p>\n
                  \u56db\u3001ArrayList\u7c7b<\/h2>\n
                  4.1 \u6982\u8ff0<\/h3>\n
                  ArrayList\u8868\u793a\u4e00\u79cd\u96c6\u5408\uff0c\u5b83\u662f\u4e00\u4e2a\u5bb9\u5668\uff0c\u7528\u6765\u88c5\u6570\u636e\u7684\uff0c\u7c7b\u4f3c\u4e8e\u6570\u7ec4<\/p>\n
                  \u800c\u96c6\u5408\u662f\u5927\u5c0f\u53ef\u53d8\u7684\uff0c\u60f3\u8981\u5b58\u50a8\u51e0\u4e2a\u5143\u7d20\u5c31\u5b58\u50a8\u51e0\u4e2a\u5143\u7d20\uff0c\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\u7528\u5f97\u66f4\u591a\u3002\u96c6\u5408\u6709\u5f88\u591a\u79cd\uff0c\u800cArrayList\u53ea\u662f\u4f17\u591a\u96c6\u5408\u4e2d\u7684\u4e00\u79cd<\/p>\n
                  \"image-20231117160239969\"<\/div><\/p>\n
                  \"image-20231117160251886\"<\/div><\/p>\n
                  4.2 \u5e38\u7528\u65b9\u6cd5<\/h3>\n
                  \u7b2c\u4e00\u6b65\uff1a\u521b\u5efaArrayList\u5bb9\u5668\u5bf9\u8c61\u3002\u4e00\u822c\u4f7f\u7528\u7a7a\u53c2\u6570\u6784\u9020\u65b9\u6cd5\uff1b<\/p>\n
                  \u7b2c\u4e8c\u6b65\uff1a\u8c03\u7528ArrayList\u7c7b\u7684\u5e38\u7528\u65b9\u6cd5\u5bf9\u5bb9\u5668\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u64cd\u4f5c\u3002\u5e38\u7528\u65b9\u6cd5\u5982\u4e0b<\/p>\n
                  \"image-20231117160415206\"<\/div><\/p>\n
                  \u4e3e\u4f8b\uff1a<\/p>\n
                  \/**\n\u76ee\u6807\uff1a\u8981\u6c42\u540c\u5b66\u4eec\u638c\u63e1\u5982\u4f55\u521b\u5efaArrayList\u96c6\u5408\u7684\u5bf9\u8c61\uff0c\u5e76\u719f\u6089ArrayList\u63d0\u4f9b\u7684\u5e38\u7528\u65b9\u6cd5\u3002\n *\/\npublic class ArrayListDemo1 {\n    public static void main(String[] args) {\n        \/\/ 1\u3001\u521b\u5efa\u4e00\u4e2aArrayList\u7684\u96c6\u5408\u5bf9\u8c61\n        \/\/ ArrayList<String> list = new ArrayList<String>();\n        \/\/ \u4ecejdk 1.7\u5f00\u59cb\u624d\u652f\u6301\u7684\n        ArrayList<String> list = new ArrayList<>();\n\n        list.add("\u9ed1\u9a6c");\n        list.add("\u9ed1\u9a6c");\n        list.add("Java");\n        System.out.println(list);\n\n        \/\/ 2\u3001\u5f80\u96c6\u5408\u4e2d\u7684\u67d0\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5904\u6dfb\u52a0\u4e00\u4e2a\u6570\u636e\n        list.add(1, "MySQL");\n        System.out.println(list);\n\n        \/\/ 3\u3001\u6839\u636e\u7d22\u5f15\u83b7\u53d6\u96c6\u5408\u4e2d\u67d0\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5904\u7684\u503c\n        String rs = list.get(1);\n        System.out.println(rs);\n\n        \/\/ 4\u3001\u83b7\u53d6\u96c6\u5408\u7684\u5927\u5c0f\uff08\u8fd4\u56de\u96c6\u5408\u4e2d\u5b58\u50a8\u7684\u5143\u7d20\u4e2a\u6570\uff09\n        System.out.println(list.size());\n\n        \/\/ 5\u3001\u6839\u636e\u7d22\u5f15\u5220\u9664\u96c6\u5408\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\u503c\uff0c\u4f1a\u8fd4\u56de\u88ab\u5220\u9664\u7684\u5143\u7d20\u503c\u7ed9\u6211\u4eec\n        System.out.println(list.remove(1));\n        System.out.println(list);\n\n        \/\/ 6\u3001\u76f4\u63a5\u5220\u9664\u67d0\u4e2a\u5143\u7d20\u503c\uff0c\u5220\u9664\u6210\u529f\u4f1a\u8fd4\u56detrue\uff0c\u53cd\u4e4b\n        System.out.println(list.remove("Java"));\n        System.out.println(list);\n\n        list.add(1, "html");\n        System.out.println(list);\n\n        \/\/ \u9ed8\u8ba4\u5220\u9664\u7684\u662f\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u8fd9\u4e2a\u9ed1\u9a6c\u7684\u6570\u636e\u7684\n        System.out.println(list.remove("\u9ed1\u9a6c"));\n        System.out.println(list);\n\n        \/\/ 7\u3001\u4fee\u6539\u67d0\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u5904\u7684\u6570\u636e\uff0c\u4fee\u6539\u540e\u4f1a\u8fd4\u56de\u539f\u6765\u7684\u503c\u7ed9\u6211\u4eec\n        System.out.println(list.set(1, "\u9ed1\u9a6c\u7a0b\u5e8f\u5458"));\n        System.out.println(list);\n    }\n\n}<\/code><\/pre>\n
                  4.3 \u6848\u4f8b\u4e00\uff1a\u4ece\u5bb9\u5668\u4e2d\u627e\u51fa\u6570\u636e\u5e76\u5220\u9664<\/h3>\n
                  1.\u7528\u6237\u53ef\u4ee5\u9009\u8d2d\u591a\u4e2a\u5546\u54c1\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2aArrayList\u96c6\u5408\uff0c\u5b58\u50a8\u8fd9\u4e9b\u5546\u54c1\n2.\u6309\u7167\u9700\u6c42\uff0c\u5982\u679c\u7528\u6237\u9009\u62e9\u4e86"\u67b8\u675e"\u6279\u91cf\u5220\u9664\uff0c\u5e94\u8be5\u5220\u9664\u5305\u542b"\u67b8\u675e"\u7684\u6240\u6709\u5143\u7d20\n    1)\u8fd9\u65f6\u5e94\u8be5\u904d\u5386\u96c6\u5408\u4e2d\u6bcf\u4e00\u4e2aString\u7c7b\u578b\u7684\u5143\u7d20\n    2)\u4f7f\u7528String\u7c7b\u7684\u65b9\u6cd5contains\u5224\u65ad\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u5305\u542b"\u67b8\u675e"\n    3)\u5305\u542b\u5c31\u628a\u5143\u7d20\u5220\u9664\n3.\u8f93\u51fa\u96c6\u5408\u4e2d\u7684\u5143\u7d20\uff0c\u770b\u662f\u5426\u5305\u542b"\u67b8\u675e"\u7684\u5143\u7d20\u5168\u90e8\u5220\u9664<\/code><\/pre>\n
                  import java.util.ArrayList;\n\npublic class ArrayListTest2 {\n    public static void main(String[] args) {\n        \/\/ 1\u3001\u521b\u5efa\u4e00\u4e2aArrayList\u96c6\u5408\u5bf9\u8c61\n        ArrayList<String> list = new ArrayList<>();\n        list.add("\u67b8\u675e");\n        list.add("Java\u5165\u95e8");\n        list.add("\u5b81\u590f\u67b8\u675e");\n        list.add("\u9ed1\u67b8\u675e");\n        list.add("\u4eba\u5b57\u62d6");\n        list.add("\u7279\u7ea7\u67b8\u675e");\n        list.add("\u67b8\u675e\u5b50");\n        System.out.println(list);\n        \/\/\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a [Java\u5165\u95e8, \u5b81\u590f\u67b8\u675e, \u9ed1\u67b8\u675e, \u4eba\u5b57\u62d6, \u7279\u7ea7\u67b8\u675e, \u67b8\u675e\u5b50]\n\n        \/\/ 2\u3001\u5f00\u59cb\u5b8c\u6210\u9700\u6c42\uff1a\u4ece\u96c6\u5408\u4e2d\u627e\u51fa\u5305\u542b\u67b8\u675e\u7684\u6570\u636e\u5e76\u5220\u9664\u5b83\n        for (int i = list.size() - 1; i >= 0; i--) {\n            \/\/ \u53d6\u51fa\u5f53\u524d\u904d\u5386\u5230\u7684\u6570\u636e\n            String ele = list.get(i);\n            \/\/ \u5224\u65ad\u8fd9\u4e2a\u6570\u636e\u4e2d\u5305\u542b\u67b8\u675e\n            if(ele.contains("\u67b8\u675e")){\n                \/\/ \u76f4\u63a5\u4ece\u96c6\u5408\u4e2d\u5220\u9664\u8be5\u6570\u636e\n                list.remove(ele);\n            }\n        }\n        System.out.println(list);\n        \/\/\u5220\u9664\u540e\u7ed3\u679c\u5982\u4e0b\uff1a[Java\u5165\u95e8, \u9ed1\u67b8\u675e, \u4eba\u5b57\u62d6, \u67b8\u675e\u5b50]\n    }\n}<\/code><\/pre>\n
                  4.4 \u6848\u4f8b\u4e8c\uff1a\u96c6\u5408\u4e2d\u5b58\u50a8\u81ea\u5b9a\u4e49\u5bf9\u8c61<\/h3>\n
                  \u5206\u6790\u9700\u6c42\u53d1\u73b0\uff1a\n\n\u5728\u5916\u5356\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e00\u4efd\u83dc\u90fd\u5305\u542b\uff0c\u83dc\u54c1\u7684\u540d\u79f0\u3001\u83dc\u54c1\u7684\u539f\u4ef7\u3001\u83dc\u54c1\u7684\u4f18\u60e0\u4ef7\u3001\u83dc\u54c1\u7684\u5176\u4ed6\u4fe1\u606f\u3002\u90a3\u6211\u4eec\u5c31\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u83dc\u54c1\u7c7b\uff08Food\u7c7b\uff09\uff0c\u7528\u6765\u63cf\u8ff0\u6bcf\u4e00\u4e2a\u83dc\u54c1\u5bf9\u8c61\u8981\u5c01\u88c5\u90a3\u4e9b\u6570\u636e\u3002\n\n\u63a5\u7740\u518d\u5199\u4e00\u4e2a\u83dc\u54c1\u7ba1\u7406\u7c7b\uff08FoodManager\u7c7b\uff09\uff0c\u63d0\u4f9b\u5c55\u793a\u64cd\u4f5c\u754c\u9762\u3001\u4e0a\u67b6\u83dc\u54c1\u3001\u6d4f\u89c8\u83dc\u54c1\u7684\u529f\u80fd\u3002<\/code><\/pre>\n
                  \u9996\u5148\u6211\u4eec\u5148\u5b9a\u4e49\u4e00\u4e2a\u83dc\u54c1\u7c7b\uff08Food\u7c7b\uff09\uff0c\u7528\u6765\u63cf\u8ff0\u6bcf\u4e00\u4e2a\u83dc\u54c1\u5bf9\u8c61\u8981\u5c01\u88c5\u90a3\u4e9b\u6570\u636e\u3002<\/p>\n
                  public class Food {\n    private String name;    \/\/\u83dc\u54c1\u540d\u79f0\n    private double originalPrice; \/\/\u83dc\u54c1\u539f\u4ef7\n    private double specialPrice; \/\/\u83dc\u54c1\u4f18\u60e0\u4ef7\n    private String info; \/\/\u83dc\u54c1\u5176\u4ed6\u4fe1\u606f\n\n    public Food() {\n    }\n\n    public Food(String name, double originalPrice, double specialPrice, String info) {\n        this.name = name;\n        this.originalPrice = originalPrice;\n        this.specialPrice = specialPrice;\n        this.info = info;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public double getOriginalPrice() {\n        return originalPrice;\n    }\n\n    public void setOriginalPrice(double originalPrice) {\n        this.originalPrice = originalPrice;\n    }\n\n    public double getSpecialPrice() {\n        return specialPrice;\n    }\n\n    public void setSpecialPrice(double specialPrice) {\n        this.specialPrice = specialPrice;\n    }\n\n    public String getInfo() {\n        return info;\n    }\n\n    public void setInfo(String info) {\n        this.info = info;\n    }\n\n}<\/code><\/pre>\n
                  \u63a5\u4e0b\u6765\u5199\u4e00\u4e2a\u83dc\u54c1\u7ba1\u7406\u7c7b\uff0c\u63d0\u4f9b**\u4e0a\u67b6\u83dc\u54c1\u7684\u529f\u80fd\u3001\u6d4f\u89c8\u83dc\u54c1\u7684\u529f\u80fd\u3001\u5c55\u793a\u64cd\u4f5c\u754c\u9762\u7684\u529f\u80fd<\/p>\n
                  public class FoodManager{\n    \/\/\u4e3a\u4e86\u5b58\u50a8\u591a\u4e2a\u83dc\u54c1\uff0c\u9884\u5148\u521b\u5efa\u4e00\u4e2aArrayList\u96c6\u5408\uff1b\n    \/\/\u4e0a\u67b6\u83dc\u54c1\u65f6\uff0c\u5176\u5b9e\u5c31\u662f\u5f80\u96c6\u5408\u4e2d\u6dfb\u52a0\u83dc\u54c1\u5bf9\u8c61\n    \/\/\u6d4f\u89c8\u83dc\u54c1\u65f6\uff0c\u5176\u5b9e\u5c31\u662f\u904d\u5386\u96c6\u5408\u4e2d\u7684\u83dc\u54c1\u5bf9\u8c61\uff0c\u5e76\u6253\u5370\u83dc\u54c1\u5bf9\u8c61\u7684\u5c5e\u6027\u4fe1\u606f\u3002\n    private ArrayList<Food> foods = new ArrayList<>(); \n    \/\/\u4e3a\u4e86\u5728\u4e0b\u9762\u7684\u591a\u4e2a\u65b9\u6cd5\u4e2d\uff0c\u80fd\u591f\u4f7f\u7528\u952e\u76d8\u5f55\u5165\uff0c\u63d0\u524d\u628aScanner\u5bf9\u8c61\u521b\u5efa\u597d\uff1b\n    private Scanner sc = new Scanner(System.in);\n\n    \/**\n     1\u3001\u5546\u5bb6\u4e0a\u67b6\u83dc\u54c1\n     *\/\n    public void add(){\n        System.out.println("===\u83dc\u54c1\u4e0a\u67b6==");\n        \/\/ 2\u3001\u63d0\u524d\u521b\u5efa\u4e00\u4e2a\u83dc\u54c1\u5bf9\u8c61\uff0c\u7528\u4e8e\u5c01\u88c5\u7528\u6237\u4e0a\u67b6\u7684\u83dc\u54c1\u4fe1\u606f\n        Food food = new Food();\n        System.out.println("\u8bf7\u60a8\u8f93\u5165\u4e0a\u67b6\u83dc\u54c1\u7684\u540d\u79f0\uff1a");\n        String name = sc.next();\n        food.setName(name);\n\n        System.out.println("\u8bf7\u60a8\u8f93\u5165\u4e0a\u67b6\u83dc\u54c1\u7684\u539f\u4ef7\uff1a");\n        double originalPrice = sc.nextDouble();\n        food.setOriginalPrice(originalPrice);\n\n        System.out.println("\u8bf7\u60a8\u8f93\u5165\u4e0a\u67b6\u83dc\u54c1\u7684\u4f18\u60e0\u4ef7\uff1a");\n        double specialPrice = sc.nextDouble();\n        food.setSpecialPrice(specialPrice);\n\n        System.out.println("\u8bf7\u60a8\u8f93\u5165\u4e0a\u67b6\u83dc\u54c1\u7684\u5176\u4ed6\u4fe1\u606f\uff1a");\n        String info = sc.next();\n        food.setInfo(info);\n\n        \/\/ 3\u3001\u628a\u83dc\u54c1\u5bf9\u8c61\u6dfb\u52a0\u5230\u96c6\u5408\u5bb9\u5668\u4e2d\u53bb\n        foods.add(food);\n        System.out.println("\u606d\u559c\u60a8\uff0c\u4e0a\u67b6\u6210\u529f~~~");\n    }\n\n    \/**\n       2\u3001\u83dc\u54c1\uff1b\u6d4f\u89c8\u529f\u80fd\n     *\/\n    public void printAllFoods(){\n        System.out.println("==\u5f53\u524d\u83dc\u54c1\u4fe1\u606f\u5982\u4e0b\uff1a==");\n        for (int i = 0; i < foods.size(); i++) {\n            Food food = foods.get(i);\n            System.out.println("\u83dc\u54c1\u540d\u79f0\uff1a" + food.getName());\n            System.out.println("\u83dc\u54c1\u539f\u4ef7\uff1a" + food.getOriginalPrice());\n            System.out.println("\u83dc\u54c1\u4f18\u60e0\u4ef7\uff1a" + food.getSpecialPrice());\n            System.out.println("\u5176\u4ed6\u63cf\u8ff0\u4fe1\u606f\uff1a" + food.getInfo());\n            System.out.println("------------------------");\n        }\n    }\n    \/**\n    3\u3001\u4e13\u95e8\u8d1f\u8d23\u5c55\u793a\u7cfb\u7edf\u754c\u9762\u7684\n    *\/\n    public void start(){\n        while (true) {\n            System.out.println("====\u6b22\u8fce\u8fdb\u5165\u5546\u5bb6\u540e\u53f0\u7ba1\u7406\u7cfb\u7edf=====");\n            System.out.println("1\u3001\u4e0a\u67b6\u83dc\u54c1\uff08add\uff09");\n            System.out.println("2\u3001\u6d4f\u89c8\u83dc\u54c1\uff08query\uff09");\n            System.out.println("3\u3001\u9000\u51fa\u7cfb\u7edf\uff08exit\uff09");\n            System.out.println("\u8bf7\u60a8\u9009\u62e9\u64cd\u4f5c\u547d\u4ee4\uff1a");\n            String command = sc.next();\n            switch (command) {\n                case "add":\n                    add();\n                    break;\n                case "query":\n                    printAllFoods();\n                    break;\n                case "exit":\n                    return; \/\/ \u7ed3\u675f\u5f53\u524d\u65b9\u6cd5\uff01\n                default:\n                    System.out.println("\u60a8\u8f93\u5165\u7684\u64cd\u4f5c\u547d\u4ee4\u6709\u8bef~~");\n            }\n        }\n    }\n\n}<\/code><\/pre>\n
                  \u6700\u540e\u5728\u5199\u4e00\u4e2a\u6d4b\u8bd5\u7c7bTest\uff0c\u5728\u6d4b\u8bd5\u7c7b\u4e2d\u8fdb\u884c\u6d4b\u8bd5\u3002\u5176\u5b9e\u6d4b\u8bd5\u7c7b\uff0c\u53ea\u8d77\u5230\u4e00\u4e2a\u542f\u52a8\u7a0b\u5e8f\u7684\u4f5c\u7528<\/p>\n
                  public class Test {\n    public static void main(String[] args) {\n        FoodManager manager = new FoodManager();\n        manager.start();\n    }\n}<\/code><\/pre>\n
                  \u7b2c\u4e5d\u90e8\u5206 Java\u57fa\u7840\u7efc\u5408\u5b9e\u6218<\/h1>\n","protected":false},"excerpt":{"rendered":"
                  \u7b2c\u4e00\u90e8\u5206 Java\u57fa\u7840\u8bed\u6cd5 1.1 \u6ce8\u91ca \u6ce8\u91ca\u662f\u89e3\u91ca\u8bf4\u660e\u7a0b\u5e8f\u7684\u95ee\u9898\uff0c\u65b9\u4fbf\u81ea\u5df1\u548c\u522b\u4eba\u9605\u8bfb\u4ee3\u7801 \u5206\u7c7b\uff1a 1.\u5355\u884c\u6ce8 […]<\/p>\n","protected":false},"author":1,"featured_media":116,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[3],"class_list":["post-99","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java"],"_links":{"self":[{"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/posts\/99","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/comments?post=99"}],"version-history":[{"count":1,"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/posts\/99\/revisions"}],"predecessor-version":[{"id":100,"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/posts\/99\/revisions\/100"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/media\/116"}],"wp:attachment":[{"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/media?parent=99"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/categories?post=99"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sunqizheng1997.com\/index.php\/wp-json\/wp\/v2\/tags?post=99"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}