{"id":229,"date":"2026-07-16T08:16:14","date_gmt":"2026-07-16T00:16:14","guid":{"rendered":"http:\/\/ssjava.xyz\/?p=229"},"modified":"2026-07-17T11:06:26","modified_gmt":"2026-07-17T03:06:26","slug":"10-%e7%b1%bb%e4%b8%8e%e5%af%b9%e8%b1%a1%ef%bc%9a%e4%bb%8e%e7%8e%b0%e5%ae%9e%e4%b8%96%e7%95%8c%e5%88%b0-java-%e4%bb%a3%e7%a0%81","status":"publish","type":"post","link":"https:\/\/ssjava.xyz\/index.php\/2026\/07\/16\/10-%e7%b1%bb%e4%b8%8e%e5%af%b9%e8%b1%a1%ef%bc%9a%e4%bb%8e%e7%8e%b0%e5%ae%9e%e4%b8%96%e7%95%8c%e5%88%b0-java-%e4%bb%a3%e7%a0%81\/","title":{"rendered":"10. \u7c7b\u4e0e\u5bf9\u8c61\uff1a\u4ece\u73b0\u5b9e\u4e16\u754c\u5230 Java \u4ee3\u7801"},"content":{"rendered":"\n

\u8fd8\u8bb0\u5f97\u6211\u4eec\u5b66\u8fc7\u7684\u6d41\u7a0b\u63a7\u5236\u5417\uff1fif<\/code>\u3001for<\/code>\u3001while<\/code>\u2026\u2026\u8fd9\u4e9b\u90fd\u662f\u9762\u5411\u8fc7\u7a0b<\/strong>\u7684\u601d\u7ef4\u65b9\u5f0f\u2014\u2014\u4e00\u4e2a\u6b65\u9aa4\u63a5\u7740\u4e00\u4e2a\u6b65\u9aa4\uff0c\u7528\u4ee3\u7801\u63cf\u8ff0”\u600e\u4e48\u505a”\u3002\u4f46\u73b0\u5b9e\u4e16\u754c\u8fdc\u6bd4\u4e00\u4e2a\u6d41\u7a0b\u590d\u6742\uff1a\u4e00\u53f0\u624b\u673a\u6709\u54c1\u724c\u3001\u989c\u8272\u3001\u4ef7\u683c\uff0c\u8fd8\u80fd\u6253\u7535\u8bdd\u3001\u62cd\u7167\u3001\u73a9\u6e38\u620f\u3002\u624b\u673a\u662f\u4e00\u4e2a\u5bf9\u8c61<\/strong>\uff0c\u5b83\u6709\u5c5e\u6027\uff08\u54c1\u724c\u3001\u989c\u8272\uff09\uff0c\u4e5f\u6709\u884c\u4e3a\uff08\u6253\u7535\u8bdd\u3001\u62cd\u7167\uff09\u3002\u628a\u73b0\u5b9e\u4e16\u754c\u7684\u4e8b\u7269\u62bd\u8c61\u6210”\u5bf9\u8c61”\uff0c\u8ba9\u7a0b\u5e8f\u7528\u5bf9\u8c61\u4e4b\u95f4\u7684\u4ea4\u4e92\u6765\u89e3\u51b3\u95ee\u9898\u2014\u2014\u8fd9\u5c31\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b<\/strong>\uff08OOP\uff09\u7684\u6838\u5fc3\u601d\u60f3\u3002<\/p>\n\n\n\n

\u4e00\u3001\u4ec0\u4e48\u662f\u9762\u5411\u5bf9\u8c61\uff1f<\/h2>\n\n\n\n

1.1 \u9762\u5411\u8fc7\u7a0b vs \u9762\u5411\u5bf9\u8c61<\/h3>\n\n\n\n

\u60f3\u8c61\u4f60\u8981\u505a\u4e00\u9053\u756a\u8304\u7092\u86cb\uff1a<\/p>\n\n\n\n

\u9762\u5411\u8fc7\u7a0b<\/strong>\u7684\u5199\u6cd5\uff1a<\/p>\n\n\n\n

1. \u6d17\u756a\u8304 \u2192 2. \u5207\u756a\u8304 \u2192 3. \u6253\u86cb \u2192 4. \u70ed\u6cb9 \u2192 5. \u7092\u86cb \u2192 6. \u52a0\u756a\u8304\u7092 \u2192 7. \u51fa\u9505<\/code><\/pre>\n\n\n\n
\u9762\u5411\u5bf9\u8c61<\/strong>\u7684\u5199\u6cd5\uff1a<\/p>\n\n\n\n
\u756a\u8304 = new \u98df\u6750(\"\u756a\u8304\", 2\u4e2a);\n\u9e21\u86cb = new \u98df\u6750(\"\u9e21\u86cb\", 3\u4e2a);\n\u9505 = new \u53a8\u5177(\"\u7092\u9505\");\n\u53a8\u5e08.\u6d17(\u756a\u8304).\u5207(\u756a\u8304);\n\u53a8\u5e08.\u6253(\u9e21\u86cb);\n\u9505.\u70ed\u6cb9().\u7092(\u9e21\u86cb).\u52a0(\u756a\u8304).\u7ffb\u7092().\u51fa\u9505();<\/code><\/pre>\n\n\n\n
\u770b\u5230\u533a\u522b\u4e86\u5417\uff1f\u9762\u5411\u8fc7\u7a0b\u5173\u5fc3\u6b65\u9aa4<\/strong>\uff0c\u9762\u5411\u5bf9\u8c61\u5173\u5fc3\u5bf9\u8c61<\/strong>\u4ee5\u53ca\u5b83\u4eec\u4e4b\u95f4\u7684\u4ea4\u4e92<\/strong>\u3002\u9762\u5411\u5bf9\u8c61\u7684\u4ee3\u7801\u66f4\u63a5\u8fd1\u4eba\u7c7b\u7684\u601d\u7ef4\u65b9\u5f0f\u2014\u2014\u6211\u4eec\u4e0d\u662f\u5728\u5199\u673a\u5668\u6307\u4ee4\uff0c\u800c\u662f\u5728\u63cf\u8ff0”\u8c01\u505a\u4e86\u4ec0\u4e48\u4e8b”\u3002<\/p>\n\n\n\n
1.2 \u9762\u5411\u5bf9\u8c61\u7684\u4e09\u5927\u7279\u5f81<\/h3>\n\n\n\n
Java \u7684\u9762\u5411\u5bf9\u8c61\u6709\u4e09\u5927\u57fa\u672c\u7279\u5f81\uff0c\u8fd9\u4e5f\u662f\u9762\u8bd5\u4e2d\u6700\u9ad8\u9891\u7684\u6982\u5ff5\u4e4b\u4e00\uff1a<\/p>\n\n\n\n
\u7279\u5f81<\/th>\u8bf4\u660e<\/th>\u4e00\u53e5\u8bdd\u8bb0\u4f4f<\/th><\/tr><\/thead>
\u5c01\u88c5<\/strong>\uff08Encapsulation\uff09<\/td>\u5c06\u6570\u636e\u548c\u64cd\u4f5c\u6570\u636e\u7684\u65b9\u6cd5\u5305\u88c5\u5728\u7c7b\u4e2d\uff0c\u5bf9\u5916\u9690\u85cf\u5185\u90e8\u7ec6\u8282<\/td>“\u6211\u53ea\u7ba1\u7528\uff0c\u4e0d\u7528\u7ba1\u600e\u4e48\u5b9e\u73b0”<\/td><\/tr>
\u7ee7\u627f<\/strong>\uff08Inheritance\uff09<\/td>\u5b50\u7c7b\u81ea\u52a8\u62e5\u6709\u7236\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u5e76\u53ef\u4ee5\u6269\u5c55<\/td>“\u5b50\u627f\u7236\u4e1a\uff0c\u8fd8\u80fd\u81ea\u5df1\u521b\u65b0”<\/td><\/tr>
\u591a\u6001<\/strong>\uff08Polymorphism\uff09<\/td>\u540c\u4e00\u65b9\u6cd5\u5728\u4e0d\u540c\u5bf9\u8c61\u4e0a\u8868\u73b0\u51fa\u4e0d\u540c\u7684\u884c\u4e3a<\/td>“\u540c\u4e00\u4e2a\u63a5\u53e3\uff0c\u4e0d\u540c\u5b9e\u73b0”<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u672c\u7ae0\u6211\u4eec\u5148\u6df1\u5165\u8bb2\u89e3\u5c01\u88c5<\/strong>\uff0c\u7ee7\u627f\u548c\u591a\u6001\u5c06\u5728\u540e\u7eed\u7ae0\u8282\u5c55\u5f00\u3002<\/p>\n\n\n\n
\u4e8c\u3001\u7c7b\u4e0e\u5bf9\u8c61<\/h2>\n\n\n\n
2.1 \u4ec0\u4e48\u662f\u7c7b\uff1f\u4ec0\u4e48\u662f\u5bf9\u8c61\uff1f<\/h3>\n\n\n\n
\u7c7b<\/strong>\uff08Class\uff09\u662f\u5bf9\u8c61\u7684\u6a21\u677f<\/strong>\u6216\u84dd\u56fe<\/strong>\u3002\u5bf9\u8c61<\/strong>\uff08Object\uff09\u662f\u7c7b\u7684\u5b9e\u4f8b<\/strong>\u3002<\/p>\n\n\n\n
\u6253\u4e2a\u6bd4\u65b9\uff1a<\/p>\n\n\n\n
    \n
  • \u7c7b<\/strong> = \u4e00\u5f20\u5efa\u7b51\u8bbe\u8ba1\u56fe\uff08\u89c4\u5b9a\u4e86\u623f\u5b50\u8981\u6709\u51e0\u95f4\u623f\u3001\u95e8\u7a97\u4f4d\u7f6e\uff09<\/li>\n\n\n\n
  • \u5bf9\u8c61<\/strong> = \u6309\u8fd9\u5f20\u56fe\u7eb8\u76d6\u51fa\u6765\u7684\u771f\u5b9e\u623f\u5b50\uff08\u6709\u5177\u4f53\u5730\u5740\u3001\u4f4f\u7740\u4eba\uff09<\/li>\n<\/ul>\n\n\n\n
    \u4e00\u5f20\u56fe\u7eb8\u53ef\u4ee5\u76d6\u51fa\u65e0\u6570\u680b\u623f\u5b50\uff0c\u6bcf\u4e2a\u623f\u5b50\u90fd\u662f\u72ec\u7acb\u7684\u2014\u2014\u8fd9\u5c31\u662f”\u7c7b\u53ef\u4ee5\u521b\u5efa\u591a\u4e2a\u5b9e\u4f8b”\u3002<\/p>\n\n\n\n
    2.2 \u5b9a\u4e49\u4e00\u4e2a\u7c7b<\/h3>\n\n\n\n
    \u5728 Java \u4e2d\uff0c\u4f7f\u7528\u5173\u952e\u5b57 class<\/code> \u6765\u5b9a\u4e49\u7c7b\uff1a<\/p>\n\n\n
    \/\/ \u5b9a\u4e49\u4e00\u4e2a\"\u624b\u673a\"\u7c7b\npublic class Phone {\n    \/\/ \u5c5e\u6027\uff08\u4e5f\u53eb\u6210\u5458\u53d8\u91cf\u3001\u5b57\u6bb5\uff09\n    String brand;      \/\/ \u54c1\u724c\n    String color;      \/\/ \u989c\u8272\n    double price;      \/\/ \u4ef7\u683c\n    \n    \/\/ \u65b9\u6cd5\uff08\u4e5f\u53eb\u6210\u5458\u65b9\u6cd5\uff09\n    public void call(String name) {\n        System.out.println(\"\u6b63\u5728\u7ed9 \" + name + \" \u6253\u7535\u8bdd...\");\n    }\n    \n    public void playGame() {\n        System.out.println(\"\u6b63\u5728\u73a9\u624b\u673a\u6e38\u620f...\");\n    }\n}<\/code><\/pre>\n\n\n
    2.3 \u521b\u5efa\u5bf9\u8c61\uff08\u5b9e\u4f8b\u5316\uff09<\/h3>\n\n\n\n
    \u4f7f\u7528 new<\/code> \u5173\u952e\u5b57\u6765\u521b\u5efa\u5bf9\u8c61\uff1a<\/p>\n\n\n
    public class TestPhone {\n    public static void main(String[] args) {\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u624b\u673a\u5bf9\u8c61\n        Phone myPhone = new Phone();\n        \n        \/\/ \u7ed9\u5bf9\u8c61\u7684\u5c5e\u6027\u8d4b\u503c\n        myPhone.brand = \"\u534e\u4e3a\";\n        myPhone.color = \"\u6781\u5149\u84dd\";\n        myPhone.price = 5999.0;\n        \n        \/\/ \u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\n        myPhone.call(\"\u5c0f\u660e\");\n        myPhone.playGame();\n        \n        \/\/ \u8f93\u51fa\u5c5e\u6027\n        System.out.println(\"\u6211\u4e70\u4e86\u4e00\u53f0 \" + myPhone.brand + \"\uff0c\u989c\u8272\u662f \" + myPhone.color + \"\uff0c\u4ef7\u683c \" + myPhone.price + \" \u5143\");\n    }\n}<\/code><\/pre>\n\n\n
    \u8f93\u51fa\uff1a<\/p>\n\n\n\n
    \u6b63\u5728\u7ed9 \u5c0f\u660e \u6253\u7535\u8bdd...\n\u6b63\u5728\u73a9\u624b\u673a\u6e38\u620f...\n\u6211\u4e70\u4e86\u4e00\u53f0 \u534e\u4e3a\uff0c\u989c\u8272\u662f \u6781\u5149\u84dd\uff0c\u4ef7\u683c 5999.0 \u5143<\/code><\/pre>\n\n\n\n
    2.4 \u5bf9\u8c61\u7684\u521b\u5efa\u8fc7\u7a0b<\/h3>\n\n\n\n
    \u5f53\u6267\u884c Phone myPhone = new Phone();<\/code> \u65f6\uff0cJVM \u505a\u4e86\u4e09\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n
      \n
    1. \u58f0\u660e<\/strong>\uff1a\u5728\u6808\u5185\u5b58\u4e2d\u521b\u5efa\u4e00\u4e2a\u5f15\u7528\u53d8\u91cf myPhone<\/code><\/li>\n\n\n\n
    2. \u5b9e\u4f8b\u5316<\/strong>\uff1a\u5728\u5806\u5185\u5b58\u4e2d\u4e3a Phone<\/code> \u5bf9\u8c61\u5206\u914d\u7a7a\u95f4\uff0c\u6240\u6709\u5c5e\u6027\u88ab\u521d\u59cb\u5316\u4e3a\u9ed8\u8ba4\u503c\uff08null<\/code> \/ 0<\/code> \/ 0.0<\/code> \/ false<\/code>\uff09<\/li>\n\n\n\n
    3. \u8d4b\u503c<\/strong>\uff1a\u5c06\u5806\u5185\u5b58\u5730\u5740\u8d4b\u503c\u7ed9 myPhone<\/code><\/li>\n<\/ol>\n\n\n\n
      \u793a\u610f\u56fe\uff1a<\/p>\n\n\n\n
      \u6808\u5185\u5b58\uff08Stack\uff09               \u5806\u5185\u5b58\uff08Heap\uff09\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510            \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502  myPhone     \u2502 \u2500\u2500\u2500\u2500\u2500\u2500\u2192    \u2502   Phone \u5bf9\u8c61     \u2502\n\u2502  (\u5f15\u7528\u5730\u5740)   \u2502            \u2502  brand = \"\u534e\u4e3a\"  \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518            \u2502  color = \"\u6781\u5149\u84dd\"\u2502\n                            \u2502  price = 5999.0  \u2502\n                            \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/code><\/pre>\n\n\n\n
      \u5173\u952e\u7406\u89e3<\/strong>\uff1amyPhone<\/code> \u4e0d\u662f\u5bf9\u8c61\u672c\u8eab\uff0c\u800c\u662f\u5bf9\u8c61\u7684\u5f15\u7528<\/strong>\uff08\u7c7b\u4f3c\u9065\u63a7\u5668\uff0c\u4e0d\u662f\u7535\u89c6\u673a\uff09\u3002myPhone.call()<\/code> \u5c31\u50cf\u6309\u4e0b\u9065\u63a7\u5668\u7684”\u62e8\u53f7”\u6309\u94ae\u2014\u2014\u5b9e\u9645\u4e0a\u64cd\u4f5c\u7684\u662f\u5806\u4e2d\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n
      \u4e09\u3001\u5c01\u88c5\uff1a\u9690\u85cf\u7ec6\u8282\uff0c\u66b4\u9732\u63a5\u53e3<\/h2>\n\n\n\n
      3.1 \u4e3a\u4ec0\u4e48\u9700\u8981\u5c01\u88c5\uff1f<\/h3>\n\n\n\n
      \u56de\u5934\u518d\u770b\u6211\u4eec\u521a\u624d\u5199\u7684 Phone<\/code> \u7c7b\u2014\u2014brand<\/code>\u3001color<\/code>\u3001price<\/code> \u8fd9\u4e9b\u5c5e\u6027\u662f\u76f4\u63a5\u66b4\u9732\u5728\u5916\u9762\u7684\u3002\u8fd9\u610f\u5473\u7740\u5916\u90e8\u4ee3\u7801\u53ef\u4ee5\u968f\u610f\u4fee\u6539\u5b83\u4eec\uff1a<\/p>\n\n\n
      Phone p = new Phone();\np.price = -100;  \/\/ \u4ef7\u683c\u7adf\u7136\u53ef\u4ee5\u662f\u8d1f\u6570\uff1f\u4e0d\u5408\u7406\uff01<\/code><\/pre>\n\n\n
      \u8fd9\u5c31\u662f\u95ee\u9898\u6240\u5728\uff1a\u76f4\u63a5\u66b4\u9732\u5185\u90e8\u6570\u636e\uff0c\u5916\u90e8\u53ef\u4ee5\u968f\u610f\u7834\u574f\u5bf9\u8c61\u7684\u5408\u6cd5\u6027<\/strong>\u3002<\/p>\n\n\n\n
      \u5c01\u88c5<\/strong>\u5c31\u662f\uff1a<\/p>\n\n\n\n
        \n
      • \u628a\u7c7b\u7684\u5185\u90e8\u6570\u636e\uff08\u5c5e\u6027\uff09\u7528 private<\/code> \u9690\u85cf\u8d77\u6765<\/li>\n\n\n\n
      • \u5bf9\u5916\u63d0\u4f9b\u516c\u5f00\u7684 public<\/code> \u65b9\u6cd5\uff08getter\/setter\uff09\u6765\u8bbf\u95ee\u548c\u4fee\u6539\u6570\u636e<\/li>\n\n\n\n
      • \u5728\u65b9\u6cd5\u5185\u90e8\u505a\u5408\u6cd5\u6027\u6821\u9a8c\uff0c\u4fdd\u8bc1\u6570\u636e\u7684\u6709\u6548\u6027<\/li>\n<\/ul>\n\n\n\n
        3.2 \u8bbf\u95ee\u4fee\u9970\u7b26<\/h3>\n\n\n\n
        Java \u63d0\u4f9b\u4e86\u56db\u79cd\u8bbf\u95ee\u4fee\u9970\u7b26\u6765\u63a7\u5236\u53ef\u89c1\u6027\uff1a<\/p>\n\n\n\n
        \u4fee\u9970\u7b26<\/th>\u540c\u4e00\u4e2a\u7c7b<\/th>\u540c\u4e00\u4e2a\u5305<\/th>\u5b50\u7c7b<\/th>\u4efb\u4f55\u5730\u65b9<\/th><\/tr><\/thead>
        private<\/code><\/td>\u2705<\/td>\u274c<\/td>\u274c<\/td>\u274c<\/td><\/tr>
        \u9ed8\u8ba4\uff08default\uff09<\/code><\/td>\u2705<\/td>\u2705<\/td>\u274c<\/td>\u274c<\/td><\/tr>
        protected<\/code><\/td>\u2705<\/td>\u2705<\/td>\u2705<\/td>\u274c<\/td><\/tr>
        public<\/code><\/td>\u2705<\/td>\u2705<\/td>\u2705<\/td>\u2705<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
        \u5c01\u88c5\u7684\u6838\u5fc3\u539f\u5219\uff1a\u5c5e\u6027\u79c1\u6709\uff08private\uff09\uff0c\u65b9\u6cd5\u516c\u5f00\uff08public\uff09<\/strong>\u3002<\/p>\n\n\n\n
        3.3 \u52a8\u624b\u5b9e\u8df5\uff1a\u7528\u5c01\u88c5\u6539\u9020 Phone \u7c7b<\/h3>\n\n\n
        public class Phone {\n    \/\/ \u5c5e\u6027\u5168\u90e8\u79c1\u6709\n    private String brand;\n    private String color;\n    private double price;\n    \n    \/\/ \u516c\u5f00\u7684 getter \u548c setter \u65b9\u6cd5\n    public String getBrand() {\n        return brand;\n    }\n    \n    public void setBrand(String brand) {\n        if (brand == null || brand.trim().isEmpty()) {\n            System.out.println(\"\u54c1\u724c\u4e0d\u80fd\u4e3a\u7a7a\uff01\");\n            return;\n        }\n        this.brand = brand;\n    }\n    \n    public String getColor() {\n        return color;\n    }\n    \n    public void setColor(String color) {\n        if (color == null || color.trim().isEmpty()) {\n            System.out.println(\"\u989c\u8272\u4e0d\u80fd\u4e3a\u7a7a\uff01\");\n            return;\n        }\n        this.color = color;\n    }\n    \n    public double getPrice() {\n        return price;\n    }\n    \n    public void setPrice(double price) {\n        if (price < 0) {\n            System.out.println("\u4ef7\u683c\u4e0d\u80fd\u4e3a\u8d1f\u6570\uff01");\n            return;\n        }\n        this.price = price;\n    }\n    \n    public void call(String name) {\n        System.out.println(this.brand + "\u624b\u673a\u6b63\u5728\u7ed9 " + name + " \u6253\u7535\u8bdd...");\n    }\n    \n    public void playGame() {\n        System.out.println("\u6b63\u5728\u7528" + this.color + "\u7684" + this.brand + "\u624b\u673a\u73a9\u6e38\u620f...");\n    }\n}<\/code><\/pre>\n\n\n
        \u6d4b\u8bd5\u4ee3\u7801\uff1a<\/p>\n\n\n
        public class TestPhone {\n    public static void main(String[] args) {\n        Phone p = new Phone();\n        \n        p.setBrand(\"\u534e\u4e3a\");\n        p.setColor(\"\u6781\u5149\u84dd\");\n        p.setPrice(5999.0);\n        p.setPrice(-100);  \/\/ \u8f93\u51fa\uff1a\u4ef7\u683c\u4e0d\u80fd\u4e3a\u8d1f\u6570\uff01\n        \n        System.out.println(p.getBrand());  \/\/ \u534e\u4e3a\n        p.call(\"\u5c0f\u660e\");                     \/\/ \u534e\u4e3a\u624b\u673a\u6b63\u5728\u7ed9 \u5c0f\u660e \u6253\u7535\u8bdd...\n    }\n}<\/code><\/pre>\n\n\n
        \u73b0\u5728\uff0c\u4ef7\u683c\u4e0d\u4f1a\u88ab\u9519\u8bef\u5730\u8bbe\u4e3a\u8d1f\u6570\u4e86\u3002setPrice()<\/code> \u65b9\u6cd5\u5145\u5f53\u4e86\u770b\u95e8\u4eba<\/strong>\uff0c\u53ea\u5141\u8bb8\u5408\u6cd5\u7684\u503c\u8fdb\u5165\u3002<\/p>\n\n\n\n
        3.4 \u5c01\u88c5\u7684\u597d\u5904<\/h3>\n\n\n\n
          \n
        1. \u63d0\u9ad8\u5b89\u5168\u6027<\/strong>\uff1a\u9632\u6b62\u5916\u90e8\u4ee3\u7801\u76f4\u63a5\u4fee\u6539\u5185\u90e8\u6570\u636e<\/li>\n\n\n\n
        2. \u964d\u4f4e\u8026\u5408<\/strong>\uff1a\u5916\u90e8\u53ea\u4f9d\u8d56\u516c\u5f00\u65b9\u6cd5\uff0c\u5185\u90e8\u5b9e\u73b0\u53ef\u4ee5\u81ea\u7531\u4fee\u6539<\/li>\n\n\n\n
        3. \u589e\u52a0\u53ef\u7ef4\u62a4\u6027<\/strong>\uff1a\u4fee\u6539\u5185\u90e8\u5b9e\u73b0\u4e0d\u5f71\u54cd\u4f7f\u7528\u8005<\/li>\n\n\n\n
        4. \u589e\u5f3a\u7075\u6d3b\u6027<\/strong>\uff1a\u53ef\u4ee5\u5728 setter \u4e2d\u6dfb\u52a0\u6821\u9a8c\u3001\u65e5\u5fd7\u3001\u7f13\u5b58\u7b49\u903b\u8f91<\/li>\n<\/ol>\n\n\n\n
          \u56db\u3001\u7efc\u5408\u6848\u4f8b\uff1a\u5b66\u751f\u4fe1\u606f\u7ba1\u7406<\/h2>\n\n\n\n
          \u4e0b\u9762\u6211\u4eec\u7efc\u5408\u8fd0\u7528\u672c\u7ae0\u77e5\u8bc6\uff0c\u8bbe\u8ba1\u4e00\u4e2a Student<\/code> \u7c7b\uff1a<\/p>\n\n\n
          public class Student {\n    private String name;\n    private int age;\n    private String studentId;\n    private double score;\n    \n    \/\/ getter \/ setter\n    public String getName() {\n        return name;\n    }\n    \n    public void setName(String name) {\n        if (name == null || name.trim().isEmpty()) {\n            System.out.println(\"\u59d3\u540d\u4e0d\u80fd\u4e3a\u7a7a\uff01\");\n            return;\n        }\n        this.name = name;\n    }\n    \n    public int getAge() {\n        return age;\n    }\n    \n    public void setAge(int age) {\n        if (age  60) {\n            System.out.println(\"\u5e74\u9f84\u5fc5\u987b\u57286~60\u4e4b\u95f4\uff01\");\n            return;\n        }\n        this.age = age;\n    }\n    \n    public String getStudentId() {\n        return studentId;\n    }\n    \n    public void setStudentId(String studentId) {\n        if (studentId == null || !studentId.matches(\"\\d{8}\")) {\n            System.out.println(\"\u5b66\u53f7\u5fc5\u987b\u4e3a8\u4f4d\u6570\u5b57\uff01\");\n            return;\n        }\n        this.studentId = studentId;\n    }\n    \n    public double getScore() {\n        return score;\n    }\n    \n    public void setScore(double score) {\n        if (score  100) {\n            System.out.println(\"\u6210\u7ee9\u5fc5\u987b\u57280~100\u4e4b\u95f4\uff01\");\n            return;\n        }\n        this.score = score;\n    }\n    \n    \/\/ \u884c\u4e3a\u65b9\u6cd5\n    public void showInfo() {\n        System.out.println(\"===== \u5b66\u751f\u4fe1\u606f =====\");\n        System.out.println(\"\u59d3\u540d\uff1a\" + name);\n        System.out.println(\"\u5e74\u9f84\uff1a\" + age);\n        System.out.println(\"\u5b66\u53f7\uff1a\" + studentId);\n        System.out.println(\"\u6210\u7ee9\uff1a\" + score);\n        System.out.println(\"\u7b49\u7ea7\uff1a\" + getGrade());\n        System.out.println(\"===================\");\n    }\n    \n    private String getGrade() {\n        if (score >= 90) return \"\u4f18\";\n        if (score >= 80) return \"\u826f\";\n        if (score >= 70) return \"\u4e2d\";\n        if (score >= 60) return \"\u53ca\u683c\";\n        return \"\u4e0d\u53ca\u683c\";\n    }\n}<\/code><\/pre>\n\n\n
          \u6d4b\u8bd5\uff1a<\/p>\n\n\n
          public class TestStudent {\n    public static void main(String[] args) {\n        Student s = new Student();\n        \n        s.setName(\"\u5f20\u4e09\");\n        s.setAge(20);\n        s.setStudentId(\"20240001\");\n        s.setScore(85.5);\n        \n        s.showInfo();\n        \n        \/\/ \u6d4b\u8bd5\u975e\u6cd5\u6570\u636e\n        System.out.println(\"n--- \u6d4b\u8bd5\u975e\u6cd5\u6570\u636e ---\");\n        s.setAge(200);         \/\/ \u5e74\u9f84\u5fc5\u987b\u57286~60\u4e4b\u95f4\uff01\n        s.setScore(-10);       \/\/ \u6210\u7ee9\u5fc5\u987b\u57280~100\u4e4b\u95f4\uff01\n        s.setStudentId(\"abc\"); \/\/ \u5b66\u53f7\u5fc5\u987b\u4e3a8\u4f4d\u6570\u5b57\uff01\n    }\n}<\/code><\/pre>\n\n\n
          \u8f93\u51fa\uff1a<\/p>\n\n\n\n
          ===== \u5b66\u751f\u4fe1\u606f =====\n\u59d3\u540d\uff1a\u5f20\u4e09\n\u5e74\u9f84\uff1a20\n\u5b66\u53f7\uff1a20240001\n\u6210\u7ee9\uff1a85.5\n\u7b49\u7ea7\uff1a\u826f\n===================\n\n--- \u6d4b\u8bd5\u975e\u6cd5\u6570\u636e ---\n\u5e74\u9f84\u5fc5\u987b\u57286~60\u4e4b\u95f4\uff01\n\u6210\u7ee9\u5fc5\u987b\u57280~100\u4e4b\u95f4\uff01\n\u5b66\u53f7\u5fc5\u987b\u4e3a8\u4f4d\u6570\u5b57\uff01<\/code><\/pre>\n\n\n\n
          \u4e94\u3001\u5173\u4e8e this \u5173\u952e\u5b57\uff08\u9884\u544a\uff09<\/h2>\n\n\n\n
          \u7ec6\u5fc3\u7684\u4f60\u53ef\u80fd\u6ce8\u610f\u5230\u4e86\uff0c\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\u53cd\u590d\u51fa\u73b0\u4e86\u4e00\u4e2a\u5173\u952e\u5b57\u2014\u2014this<\/code>\u3002<\/p>\n\n\n
          this.brand = brand;\nthis.name = name;<\/code><\/pre>\n\n\n
          this<\/code> \u8868\u793a”\u5f53\u524d\u5bf9\u8c61\u7684\u5f15\u7528”\uff0c\u7528\u6765\u533a\u5206\u6210\u5458\u53d8\u91cf<\/strong>\u548c\u5c40\u90e8\u53d8\u91cf<\/strong>\uff08\u53c2\u6570\uff09\u3002this.brand<\/code> \u662f\u5bf9\u8c61\u7684\u5c5e\u6027\uff0cbrand<\/code> \u662f\u65b9\u6cd5\u7684\u53c2\u6570\u3002<\/p>\n\n\n\n
          this<\/code> \u8fd8\u6709\u4e00\u4e2a\u66f4\u91cd\u8981\u7684\u7528\u6cd5\u2014\u2014\u5728\u6784\u9020\u5668\u4e2d\u8c03\u7528\u53e6\u4e00\u4e2a\u6784\u9020\u5668\u3002\u8fd9\u6b63\u662f\u6211\u4eec\u4e0b\u4e00\u7bc7\u6587\u7ae0\u8981\u6df1\u5165\u8bb2\u89e3\u7684\u5185\u5bb9\uff1a\u6784\u9020\u5668<\/strong>\u3002<\/p>\n\n\n\n
          \u7ed3\u8bed<\/h2>\n\n\n\n
          \u672c\u7ae0\u6211\u4eec\u8fc8\u51fa\u4e86\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u7b2c\u4e00\u6b65\uff1a\u7406\u89e3\u4e86\u7c7b\u4e0e\u5bf9\u8c61\u7684\u6982\u5ff5\uff0c\u5b66\u4f1a\u4e86\u5982\u4f55\u5b9a\u4e49\u7c7b\u548c\u521b\u5efa\u5bf9\u8c61\uff0c\u638c\u63e1\u4e86\u5c01\u88c5\u7684\u539f\u7406\u4e0e\u5b9e\u73b0\uff0c\u5e76\u7528\u7efc\u5408\u6848\u4f8b\u628a\u77e5\u8bc6\u4e32\u4e86\u8d77\u6765\u3002<\/p>\n\n\n\n
          \u56de\u987e\u8981\u70b9\uff1a<\/p>\n\n\n\n
            \n
          • \u7c7b\u662f\u5bf9\u8c61\u7684\u6a21\u677f\uff0c\u5bf9\u8c61\u662f\u7c7b\u7684\u5b9e\u4f8b<\/li>\n\n\n\n
          • \u7528 new<\/code> \u5173\u952e\u5b57\u521b\u5efa\u5bf9\u8c61<\/li>\n\n\n\n
          • \u5c01\u88c5\u8ba9\u5c5e\u6027\u79c1\u6709\uff0c\u5bf9\u5916\u63d0\u4f9b\u516c\u5171\u7684 getter\/setter<\/li>\n\n\n\n
          • this \u5173\u952e\u5b57\u4ee3\u8868\u5f53\u524d\u5bf9\u8c61\u7684\u5f15\u7528<\/li>\n<\/ul>\n\n\n\n
            \u4e0b\u4e00\u7bc7\u6587\u7ae0\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u5b66\u4e60\u6784\u9020\u5668<\/strong>\u2014\u2014\u8fd9\u662f\u5bf9\u8c61\u521b\u5efa\u65f6\u6700\u5148\u6267\u884c\u7684\u7279\u6b8a\u65b9\u6cd5\uff0c\u4e5f\u662f\u6bcf\u4e2a Java \u5f00\u53d1\u8005\u5fc5\u987b\u638c\u63e1\u7684\u6838\u5fc3\u6280\u80fd\u3002\u6211\u4eec\u8fd8\u4f1a\u63a2\u8ba8\u6784\u9020\u5668\u91cd\u8f7d<\/strong>\u548c this() \u8c03\u7528<\/strong>\u7684\u9ad8\u7ea7\u7528\u6cd5\u3002\u656c\u8bf7\u671f\u5f85\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
            \u8fd8\u8bb0\u5f97\u6211\u4eec\u5b66\u8fc7\u7684\u6d41\u7a0b\u63a7\u5236\u5417\uff1fif\u3001for\u3001while\u2026\u2026\u8fd9\u4e9b\u90fd\u662f\u9762\u5411\u8fc7\u7a0b\u7684\u601d\u7ef4\u65b9\u5f0f\u2014\u2014\u4e00\u4e2a\u6b65\u9aa4\u63a5\u7740\u4e00\u4e2a\u6b65\u9aa4\uff0c\u7528 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35,65,10],"tags":[61,87,88,86],"class_list":["post-229","post","type-post","status-publish","format-standard","hentry","category-03-","category-01-class-encapsulation","category-javase","tag-java","tag-87","tag-88","tag-86"],"_links":{"self":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/229","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=229"}],"version-history":[{"count":3,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/229\/revisions"}],"predecessor-version":[{"id":250,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/229\/revisions\/250"}],"wp:attachment":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=229"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}