{"id":2232,"date":"2025-03-02T10:53:14","date_gmt":"2025-03-02T02:53:14","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2232"},"modified":"2025-03-02T10:53:14","modified_gmt":"2025-03-02T02:53:14","slug":"java-%e6%8a%bd%e8%b1%a1%e7%b1%bb%ef%bc%88abstract-class%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/02\/java-%e6%8a%bd%e8%b1%a1%e7%b1%bb%ef%bc%88abstract-class%ef%bc%89\/","title":{"rendered":"Java \u62bd\u8c61\u7c7b\uff08Abstract Class\uff09"},"content":{"rendered":"\n

\u62bd\u8c61\u7c7b<\/strong>\u662f Java \u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u5b83\u662f\u4e0d\u80fd\u5b9e\u4f8b\u5316\u7684\u7c7b\u3002\u62bd\u8c61\u7c7b\u4e3b\u8981\u7528\u4e8e\u63d0\u4f9b\u5b50\u7c7b\u7684\u901a\u7528\u884c\u4e3a\uff0c\u5e76\u8981\u6c42\u5b50\u7c7b\u53bb\u5b9e\u73b0\u62bd\u8c61\u65b9\u6cd5\u3002\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\u548c\u975e\u62bd\u8c61\u65b9\u6cd5\u3002<\/p>\n\n\n\n

\u62bd\u8c61\u7c7b\u7684\u5b9a\u4e49\u4e0e\u7279\u6027<\/strong><\/h4>\n\n\n\n
    \n
  1. \u62bd\u8c61\u7c7b\u7684\u5b9a\u4e49<\/strong>\uff1a\u4f7f\u7528\u00a0abstract<\/code>\u00a0\u5173\u952e\u5b57\u6765\u58f0\u660e\u4e00\u4e2a\u7c7b\u4e3a\u62bd\u8c61\u7c7b\u3002\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\uff08\u6ca1\u6709\u65b9\u6cd5\u4f53\uff09\u548c\u975e\u62bd\u8c61\u65b9\u6cd5\uff08\u6709\u65b9\u6cd5\u4f53\uff09\u3002<\/li>\n\n\n\n
  2. \u62bd\u8c61\u65b9\u6cd5<\/strong>\uff1a\u62bd\u8c61\u65b9\u6cd5\u662f\u6ca1\u6709\u5b9e\u73b0\u7684\uff0c\u4ec5\u6709\u65b9\u6cd5\u7684\u58f0\u660e\u3002\u5b50\u7c7b\u5fc5\u987b\u5b9e\u73b0\u62bd\u8c61\u65b9\u6cd5\uff0c\u9664\u975e\u5b50\u7c7b\u4e5f\u662f\u62bd\u8c61\u7c7b\u3002<\/li>\n\n\n\n
  3. \u4e0d\u80fd\u5b9e\u4f8b\u5316<\/strong>\uff1a\u62bd\u8c61\u7c7b\u4e0d\u80fd\u76f4\u63a5\u5b9e\u4f8b\u5316\uff08\u5373\u4e0d\u80fd\u901a\u8fc7\u00a0new<\/code>\u00a0\u6765\u521b\u5efa\u62bd\u8c61\u7c7b\u7684\u5bf9\u8c61\uff09\u3002\u53ea\u80fd\u901a\u8fc7\u5b50\u7c7b\u6765\u5b9e\u4f8b\u5316\u5bf9\u8c61\u3002<\/li>\n\n\n\n
  4. \u6784\u9020\u65b9\u6cd5<\/strong>\uff1a\u62bd\u8c61\u7c7b\u53ef\u4ee5\u6709\u6784\u9020\u65b9\u6cd5\uff0c\u5b50\u7c7b\u5728\u521b\u5efa\u5b9e\u4f8b\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u00a0super()<\/code>\u00a0\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u3002<\/li>\n\n\n\n
  5. \u6210\u5458\u53d8\u91cf\u548c\u65b9\u6cd5<\/strong>\uff1a\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5305\u542b\u6210\u5458\u53d8\u91cf\u3001\u5e38\u91cf\u3001\u5df2\u5b9e\u73b0\u7684\u65b9\u6cd5\u548c\u62bd\u8c61\u65b9\u6cd5\u3002\u62bd\u8c61\u7c7b\u7684\u5b50\u7c7b\u53ef\u4ee5\u7ee7\u627f\u548c\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5\u3002<\/li>\n<\/ol>\n\n\n\n

    \u8981\u6df1\u5165\u7406\u89e3 Java \u4e2d\u7684 \u62bd\u8c61\u7c7b<\/strong>\uff0c\u6211\u4eec\u53ef\u4ee5\u4ece\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\u8fdb\u4e00\u6b65\u63a2\u8ba8\uff1a<\/p>\n\n\n\n

    \u4e00\u3001\u62bd\u8c61\u7c7b\u7684\u672c\u8d28\u4e0e\u76ee\u7684<\/strong><\/h3>\n\n\n\n

    \u62bd\u8c61\u7c7b\u7684\u672c\u8d28\u662f\u4e3a\u5b50\u7c7b\u63d0\u4f9b\u4e00\u4e2a\u901a\u7528\u7684\u884c\u4e3a\u6a21\u677f\uff0c\u5e76\u901a\u8fc7 \u5f3a\u5236\u5b50\u7c7b\u5b9e\u73b0\u67d0\u4e9b\u65b9\u6cd5<\/strong> \u6765\u786e\u4fdd\u4e00\u81f4\u6027\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u4ee5\u4e0b\u51e0\u79cd\u573a\u666f\uff1a<\/p>\n\n\n\n

      \n
    1. \u5b9a\u4e49\u516c\u5171\u884c\u4e3a<\/strong>\uff1a\u5982\u679c\u4e0d\u540c\u7684\u5b50\u7c7b\u6709\u76f8\u540c\u7684\u65b9\u6cd5\u540d\uff0c\u4f46\u5b9e\u73b0\u4e0d\u540c\u7684\u529f\u80fd\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5171\u540c\u7684\u884c\u4e3a\u63d0\u53d6\u5230\u62bd\u8c61\u7c7b\u4e2d\u3002\u8fd9\u6837\uff0c\u6bcf\u4e2a\u5b50\u7c7b\u53ea\u9700\u8981\u5173\u5fc3\u5177\u4f53\u7684\u5b9e\u73b0\u3002<\/li>\n\n\n\n
    2. \u7ea6\u675f\u5b50\u7c7b\u884c\u4e3a<\/strong>\uff1a\u62bd\u8c61\u7c7b\u5f3a\u5236\u5b50\u7c7b\u5fc5\u987b\u5b9e\u73b0\u67d0\u4e9b\u65b9\u6cd5\uff0c\u8fd9\u53ef\u4ee5\u786e\u4fdd\u5b50\u7c7b\u9075\u5faa\u7edf\u4e00\u7684\u63a5\u53e3\uff0c\u907f\u514d\u4e86\u9057\u6f0f\u5fc5\u8981\u529f\u80fd\u3002<\/li>\n\n\n\n
    3. \u90e8\u5206\u5b9e\u73b0<\/strong>\uff1a\u62bd\u8c61\u7c7b\u5141\u8bb8\u6211\u4eec\u5728\u7236\u7c7b\u4e2d\u5b9e\u73b0\u90e8\u5206\u65b9\u6cd5\uff0c\u5b50\u7c7b\u5219\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u8986\u76d6\u90e8\u5206\u65b9\u6cd5\u3002\u8fd9\u79cd\u65b9\u5f0f\u63d0\u9ad8\u4e86\u4ee3\u7801\u590d\u7528\u6027\uff0c\u5e76\u51cf\u5c11\u4e86\u5197\u4f59\u4ee3\u7801\u3002<\/li>\n<\/ol>\n\n\n\n

      \u4e8c\u3001\u62bd\u8c61\u7c7b\u4e0e\u63a5\u53e3\u7684\u6bd4\u8f83<\/strong><\/h3>\n\n\n\n

      \u4e3a\u4e86\u5e2e\u52a9\u66f4\u6df1\u5165\u5730\u7406\u89e3\u62bd\u8c61\u7c7b\uff0c\u5c24\u5176\u662f\u5b83\u4e0e\u63a5\u53e3\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u6211\u4eec\u5148\u590d\u4e60\u4e00\u4e0b\u5b83\u4eec\u7684\u533a\u522b\u548c\u8054\u7cfb\uff1a<\/p>\n\n\n\n

      \u7279\u6027<\/th>\u62bd\u8c61\u7c7b (Abstract Class)<\/th>\u63a5\u53e3 (Interface)<\/th><\/tr><\/thead>
      \u65b9\u6cd5\u5b9e\u73b0<\/td>\u53ef\u4ee5\u6709\u62bd\u8c61\u65b9\u6cd5\u548c\u975e\u62bd\u8c61\u65b9\u6cd5<\/td>\u53ea\u80fd\u6709\u62bd\u8c61\u65b9\u6cd5\uff08Java 8 \u53ca\u4ee5\u540e\u53ef\u4ee5\u6709 default<\/code> \u548c static<\/code> \u65b9\u6cd5\uff09<\/td><\/tr>
      \u53d8\u91cf<\/td>\u53ef\u4ee5\u6709\u5b9e\u4f8b\u53d8\u91cf\u548c\u9759\u6001\u53d8\u91cf\uff0c\u53d8\u91cf\u53ef\u4ee5\u6709\u4efb\u4f55\u8bbf\u95ee\u4fee\u9970\u7b26<\/td>\u9ed8\u8ba4\u662f public static final<\/code> \u5e38\u91cf<\/td><\/tr>
      \u6784\u9020\u65b9\u6cd5<\/td>\u53ef\u4ee5\u6709\u6784\u9020\u65b9\u6cd5<\/td>\u6ca1\u6709\u6784\u9020\u65b9\u6cd5<\/td><\/tr>
      \u7ee7\u627f<\/td>\u5355\u7ee7\u627f\uff0c\u7c7b\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u62bd\u8c61\u7c7b<\/td>\u591a\u5b9e\u73b0\uff0c\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3<\/td><\/tr>
      \u8bbf\u95ee\u4fee\u9970\u7b26<\/td>\u65b9\u6cd5\u53ef\u4ee5\u662f public<\/code>\u3001protected<\/code>\u3001private<\/code> \u7b49<\/td>\u6240\u6709\u65b9\u6cd5\u9ed8\u8ba4\u662f public<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      1. \u4ec0\u4e48\u65f6\u5019\u4f7f\u7528\u62bd\u8c61\u7c7b\uff1f<\/strong><\/h4>\n\n\n\n
        \n
      • \u5982\u679c\u7c7b\u4e4b\u95f4\u6709\u67d0\u4e9b \u5171\u540c\u7684\u884c\u4e3a<\/strong>\uff0c\u4e14\u5e0c\u671b\u90e8\u5206\u884c\u4e3a\u5728\u7236\u7c7b\u4e2d\u63d0\u4f9b\u5b9e\u73b0\uff0c\u53ef\u4ee5\u9009\u62e9\u62bd\u8c61\u7c7b\u3002<\/li>\n\n\n\n
      • \u5982\u679c\u4f60\u60f3\u8ba9\u5b50\u7c7b \u7ee7\u627f\u5e76\u5b9e\u73b0<\/strong> \u67d0\u4e9b\u884c\u4e3a\uff0c\u4f46\u53c8\u4e0d\u5e0c\u671b\u5b9e\u4f8b\u5316\u8be5\u7c7b\uff0c\u62bd\u8c61\u7c7b\u662f\u5408\u9002\u7684\u9009\u62e9\u3002<\/li>\n\n\n\n
      • \u5f53\u4f60\u60f3\u8ba9\u5b50\u7c7b \u5b9e\u73b0\u67d0\u4e9b\u65b9\u6cd5<\/strong>\uff0c\u5e76\u4fdd\u8bc1\u5b50\u7c7b\u884c\u4e3a\u7684\u5b8c\u6574\u6027\u65f6\uff0c\u4f7f\u7528\u62bd\u8c61\u7c7b\u6765\u5f3a\u5236\u6267\u884c\u3002<\/li>\n<\/ul>\n\n\n\n

        2. \u4ec0\u4e48\u65f6\u5019\u4f7f\u7528\u63a5\u53e3\uff1f<\/strong><\/h4>\n\n\n\n
          \n
        • \u5f53\u4f60\u5e0c\u671b\u4e0d\u7ba1\u662f\u4ec0\u4e48\u7c7b\uff0c\u53ea\u8981\u5b83\u5177\u6709\u67d0\u4e9b\u884c\u4e3a\uff0c\u5c31\u80fd\u5b9e\u73b0\u63a5\u53e3\u65f6\uff0c\u63a5\u53e3\u662f\u5408\u9002\u7684\u9009\u62e9\u3002\u63a5\u53e3\u662f\u4e00\u79cd\u66f4\u7075\u6d3b\u7684\u5951\u7ea6\uff0c\u591a\u4e2a\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u540c\u4e00\u4e2a\u63a5\u53e3\u3002<\/li>\n\n\n\n
        • \u5f53\u4f60\u4e0d\u5173\u5fc3\u7c7b\u7684\u7ee7\u627f\u5173\u7cfb\uff0c\u800c\u662f\u5173\u6ce8\u4e8e\u67d0\u4e9b\u884c\u4e3a\u7684\u5b9e\u73b0\u65f6\uff0c\u4f7f\u7528\u63a5\u53e3\u3002<\/li>\n<\/ul>\n\n\n\n

          Java 8 \u5f15\u5165\u4e86 default<\/code> \u548c static<\/code> \u65b9\u6cd5\uff0c\u5141\u8bb8\u63a5\u53e3\u63d0\u4f9b\u4e00\u4e9b\u9ed8\u8ba4\u7684\u5b9e\u73b0\uff0c\u4f46\u5b83\u4ecd\u7136\u65e0\u6cd5\u50cf\u62bd\u8c61\u7c7b\u90a3\u6837\u63d0\u4f9b\u5b8c\u6574\u7684\u5b9e\u73b0\u548c\u72b6\u6001\uff08\u5373\u5b9e\u4f8b\u53d8\u91cf\uff09\u3002\u56e0\u6b64\uff0c\u5728 \u591a\u91cd\u7ee7\u627f<\/strong> \u548c \u901a\u7528\u884c\u4e3a<\/strong> \u65b9\u9762\uff0c\u63a5\u53e3\u66f4\u9002\u7528\uff0c\u800c\u5728 \u4ee3\u7801\u590d\u7528<\/strong> \u548c \u7edf\u4e00\u884c\u4e3a\u7684\u6a21\u677f<\/strong> \u65b9\u9762\uff0c\u62bd\u8c61\u7c7b\u66f4\u5408\u9002\u3002<\/p>\n\n\n\n

          \u4e09\u3001\u62bd\u8c61\u7c7b\u7684\u5b9e\u9645\u5e94\u7528<\/strong><\/h3>\n\n\n\n

          \u62bd\u8c61\u7c7b\u5728\u5f88\u591a\u8bbe\u8ba1\u6a21\u5f0f\u548c Java \u7684\u6807\u51c6\u5e93\u4e2d\u90fd\u6709\u5e94\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u5e94\u7528\u573a\u666f\uff1a<\/p>\n\n\n\n

          1. \u6a21\u677f\u65b9\u6cd5\u6a21\u5f0f\uff08Template Method Pattern\uff09<\/strong><\/h4>\n\n\n\n

          \u6a21\u677f\u65b9\u6cd5\u6a21\u5f0f\u662f\u4e00\u4e2a\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7b97\u6cd5\u7684\u9aa8\u67b6\uff0c\u5c06\u4e00\u4e9b\u6b65\u9aa4\u7684\u5b9e\u73b0\u5ef6\u8fdf\u5230\u5b50\u7c7b\u3002\u62bd\u8c61\u7c7b\u5145\u5f53\u4e86\u6a21\u677f\u65b9\u6cd5\u6a21\u5f0f\u4e2d\u7684 \u6a21\u677f<\/strong>\uff0c\u800c\u5177\u4f53\u7684\u6b65\u9aa4\u5219\u7531\u5b50\u7c7b\u53bb\u5b9e\u73b0\u3002<\/p>\n\n\n\n

          \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n

          abstract class Game {\n    abstract void initialize();\n    abstract void startPlay();\n    abstract void endPlay();\n\n    \/\/ \u6a21\u677f\u65b9\u6cd5\n    public final void play() {\n        initialize();\n        startPlay();\n        endPlay();\n    }\n}\n\nclass Cricket extends Game {\n    void initialize() {\n        System.out.println(\"Cricket Game Initialized!\");\n    }\n\n    void startPlay() {\n        System.out.println(\"Cricket Game Started!\");\n    }\n\n    void endPlay() {\n        System.out.println(\"Cricket Game Finished!\");\n    }\n}\n\nclass Football extends Game {\n    void initialize() {\n        System.out.println(\"Football Game Initialized!\");\n    }\n\n    void startPlay() {\n        System.out.println(\"Football Game Started!\");\n    }\n\n    void endPlay() {\n        System.out.println(\"Football Game Finished!\");\n    }\n}\n\npublic class Test {\n    public static void main(String[] args) {\n        Game cricket = new Cricket();\n        cricket.play();  \/\/ \u8c03\u7528\u6a21\u677f\u65b9\u6cd5\n\n        Game football = new Football();\n        football.play();  \/\/ \u8c03\u7528\u6a21\u677f\u65b9\u6cd5\n    }\n}<\/code><\/pre>\n\n\n\n
          \u8f93\u51fa\uff1a<\/strong><\/p>\n\n\n\n
          Cricket Game Initialized!\nCricket Game Started!\nCricket Game Finished!\nFootball Game Initialized!\nFootball Game Started!\nFootball Game Finished!<\/code><\/pre>\n\n\n\n
          \u89e3\u91ca\uff1a<\/p>\n\n\n\n
            \n
          • Game<\/code> \u7c7b\u5b9a\u4e49\u4e86\u6a21\u677f\u65b9\u6cd5 play()<\/code>\uff0c\u8be5\u65b9\u6cd5\u8c03\u7528\u4e86\u4e00\u7cfb\u5217\u62bd\u8c61\u65b9\u6cd5\uff0c\u5b50\u7c7b\u9700\u8981\u5b9e\u73b0\u8fd9\u4e9b\u62bd\u8c61\u65b9\u6cd5\u6765\u63d0\u4f9b\u5177\u4f53\u7684\u884c\u4e3a\u3002<\/li>\n\n\n\n
          • Cricket<\/code> \u548c Football<\/code> \u7c7b\u5206\u522b\u5b9e\u73b0\u4e86 initialize()<\/code>\u3001startPlay()<\/code> \u548c endPlay()<\/code> \u65b9\u6cd5\u3002<\/li>\n\n\n\n
          • \u4f7f\u7528\u6a21\u677f\u65b9\u6cd5\u6a21\u5f0f\u53ef\u4ee5\u8ba9\u5b50\u7c7b\u9075\u5faa\u76f8\u540c\u7684\u6b65\u9aa4\uff0c\u4f46\u6bcf\u4e2a\u5b50\u7c7b\u7684\u5b9e\u73b0\u53ef\u4ee5\u4e0d\u540c\u3002<\/li>\n<\/ul>\n\n\n\n
            2. \u4ee3\u7801\u590d\u7528<\/strong><\/h4>\n\n\n\n
            \u5f53\u591a\u4e2a\u5b50\u7c7b\u5171\u4eab\u76f8\u540c\u7684\u4ee3\u7801\u65f6\uff0c\u53ef\u4ee5\u5c06\u516c\u5171\u4ee3\u7801\u653e\u5728\u62bd\u8c61\u7c7b\u4e2d\uff0c\u907f\u514d\u4ee3\u7801\u5197\u4f59\u3002\u4f8b\u5982\uff0c\u67d0\u4e9b\u6570\u636e\u5904\u7406\u903b\u8f91\u53ef\u80fd\u5bf9\u4e8e\u6240\u6709\u5b50\u7c7b\u90fd\u662f\u76f8\u540c\u7684\uff0c\u53ef\u4ee5\u5728\u62bd\u8c61\u7c7b\u4e2d\u5b9e\u73b0\uff0c\u800c\u53ea\u6709\u5904\u7406\u6570\u636e\u7684\u65b9\u5f0f\u4e0d\u540c\uff0c\u5b50\u7c7b\u53ea\u9700\u8981\u5b9e\u73b0\u81ea\u5df1\u7684\u903b\u8f91\u3002<\/p>\n\n\n\n
            \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
            abstract class Animal {\n    \/\/ \u516c\u5171\u65b9\u6cd5\n    void sleep() {\n        System.out.println(\"Animal is sleeping\");\n    }\n\n    \/\/ \u62bd\u8c61\u65b9\u6cd5\n    abstract void sound();\n}\n\nclass Dog extends Animal {\n    @Override\n    void sound() {\n        System.out.println(\"Bark\");\n    }\n}\n\nclass Cat extends Animal {\n    @Override\n    void sound() {\n        System.out.println(\"Meow\");\n    }\n}\n\npublic class Test {\n    public static void main(String[] args) {\n        Animal dog = new Dog();\n        dog.sound(); \/\/ \"Bark\"\n        dog.sleep(); \/\/ \"Animal is sleeping\"\n\n        Animal cat = new Cat();\n        cat.sound(); \/\/ \"Meow\"\n        cat.sleep(); \/\/ \"Animal is sleeping\"\n    }\n}<\/code><\/pre>\n\n\n\n
            \u8f93\u51fa\uff1a<\/strong><\/p>\n\n\n\n
            Bark\nAnimal is sleeping\nMeow\nAnimal is sleeping<\/code><\/pre>\n\n\n\n
            \u89e3\u91ca\uff1a<\/p>\n\n\n\n
              \n
            • Animal<\/code> \u7c7b\u63d0\u4f9b\u4e86\u4e00\u4e2a sleep()<\/code> \u65b9\u6cd5\uff0c\u6240\u6709\u5b50\u7c7b\u90fd\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u8be5\u65b9\u6cd5\u3002<\/li>\n\n\n\n
            • \u5b50\u7c7b Dog<\/code> \u548c Cat<\/code> \u5206\u522b\u5b9e\u73b0\u4e86 sound()<\/code> \u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n
              3. \u5f3a\u5236\u5b50\u7c7b\u5b9e\u73b0\u67d0\u4e9b\u65b9\u6cd5<\/strong><\/h4>\n\n\n\n
              \u5f53\u4f60\u5e0c\u671b\u6240\u6709\u7684\u5b50\u7c7b\u90fd\u5177\u6709\u67d0\u4e9b\u884c\u4e3a\u65f6\uff0c\u62bd\u8c61\u7c7b\u53ef\u4ee5\u5f3a\u5236\u5b50\u7c7b\u53bb\u5b9e\u73b0\u8fd9\u4e9b\u65b9\u6cd5\u3002\u8fd9\u786e\u4fdd\u4e86\u6bcf\u4e2a\u5b50\u7c7b\u90fd\u9075\u5faa\u7edf\u4e00\u7684\u89c4\u5219\uff0c\u907f\u514d\u4e86\u9057\u6f0f\u91cd\u8981\u529f\u80fd\u3002<\/p>\n\n\n\n
              \u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
              abstract class Shape {\n    \/\/ \u62bd\u8c61\u65b9\u6cd5\n    abstract void draw();\n\n    \/\/ \u975e\u62bd\u8c61\u65b9\u6cd5\n    void description() {\n        System.out.println(\"This is a shape\");\n    }\n}\n\nclass Circle extends Shape {\n    @Override\n    void draw() {\n        System.out.println(\"Drawing Circle\");\n    }\n}\n\nclass Square extends Shape {\n    @Override\n    void draw() {\n        System.out.println(\"Drawing Square\");\n    }\n}\n\npublic class Test {\n    public static void main(String[] args) {\n        Shape circle = new Circle();\n        circle.draw();      \/\/ \"Drawing Circle\"\n        circle.description(); \/\/ \"This is a shape\"\n\n        Shape square = new Square();\n        square.draw();      \/\/ \"Drawing Square\"\n        square.description(); \/\/ \"This is a shape\"\n    }\n}<\/code><\/pre>\n\n\n\n
              \u8f93\u51fa\uff1a<\/strong><\/p>\n\n\n\n
              Drawing Circle\nThis is a shape\nDrawing Square\nThis is a shape<\/code><\/pre>\n\n\n\n
              \u89e3\u91ca\uff1a<\/p>\n\n\n\n
                \n
              • Shape<\/code> \u62bd\u8c61\u7c7b\u5b9a\u4e49\u4e86 draw()<\/code> \u62bd\u8c61\u65b9\u6cd5\uff0c\u5e76\u8981\u6c42\u6240\u6709\u5b50\u7c7b\u5b9e\u73b0\u3002<\/li>\n\n\n\n
              • description()<\/code> \u65b9\u6cd5\u662f\u516c\u5171\u7684\uff0c\u6240\u6709\u5b50\u7c7b\u90fd\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u3002<\/li>\n<\/ul>\n\n\n\n
                \n\n\n\n
                \u56db\u3001\u6df1\u5165\u7406\u89e3\u62bd\u8c61\u7c7b\u7684\u4f18\u52bf<\/strong><\/h3>\n\n\n\n
                  \n
                1. \u4ee3\u7801\u590d\u7528<\/strong>\uff1a\u62bd\u8c61\u7c7b\u5141\u8bb8\u6211\u4eec\u5728\u7236\u7c7b\u4e2d\u5b9e\u73b0\u4e00\u4e9b\u529f\u80fd\uff0c\u5b50\u7c7b\u53ea\u9700\u8981\u5173\u6ce8\u5dee\u5f02\u5316\u7684\u90e8\u5206\u3002\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u4ee3\u7801\u91cd\u590d\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u3002<\/li>\n\n\n\n
                2. \u7ea6\u675f\u6027<\/strong>\uff1a\u62bd\u8c61\u7c7b\u63d0\u4f9b\u4e86\u4e00\u79cd\u5f3a\u5236\u7ea6\u675f\u673a\u5236\uff0c\u786e\u4fdd\u5b50\u7c7b\u5b9e\u73b0\u4e86\u7236\u7c7b\u4e2d\u5b9a\u4e49\u7684\u5173\u952e\u65b9\u6cd5\u3002\u8fd9\u80fd\u6709\u6548\u907f\u514d\u5fd8\u8bb0\u5b9e\u73b0\u67d0\u4e9b\u529f\u80fd\uff0c\u4fdd\u6301\u4ee3\u7801\u4e00\u81f4\u6027\u3002<\/li>\n\n\n\n
                3. \u6269\u5c55\u6027<\/strong>\uff1a\u62bd\u8c61\u7c7b\u5141\u8bb8\u5728\u5c06\u6765\u7684\u7248\u672c\u4e2d\u6269\u5c55\u66f4\u591a\u529f\u80fd\uff0c\u53ea\u9700\u6dfb\u52a0\u65b0\u7684\u62bd\u8c61\u65b9\u6cd5\u6216\u9ed8\u8ba4\u5b9e\u73b0\uff0c\u4e0d\u9700\u8981\u4fee\u6539\u73b0\u6709\u7684\u5b50\u7c7b\u4ee3\u7801\u3002<\/li>\n\n\n\n
                4. \u589e\u5f3a\u7684\u8bbe\u8ba1\u7075\u6d3b\u6027<\/strong>\uff1a\u901a\u8fc7\u62bd\u8c61\u7c7b\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u5b9a\u5236\u63a5\u53e3\u548c\u884c\u4e3a\uff0c\u65e2\u6709\u7075\u6d3b\u6027\uff0c\u53c8\u80fd\u4fdd\u8bc1\u5b50\u7c7b\u5b9e\u73b0\u7684\u89c4\u8303\u6027\u3002<\/li>\n<\/ol>\n\n\n\n
                  \n\n\n\n
                  \u603b\u7ed3<\/strong><\/h3>\n\n\n\n
                  \u62bd\u8c61\u7c7b\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u91cd\u8981\u5de5\u5177\uff0c\u5141\u8bb8\u4f60\u5728\u7236\u7c7b\u4e2d\u5b9a\u4e49\u884c\u4e3a\u6a21\u677f\u5e76\u7ea6\u675f\u5b50\u7c7b\u5b9e\u73b0\u7279\u5b9a\u7684\u65b9\u6cd5\u3002\u5b83\u80fd\u591f\u63d0\u9ad8\u4ee3\u7801\u590d\u7528\u6027\u3001\u589e\u52a0\u4ee3\u7801\u7075\u6d3b\u6027\u5e76\u786e\u4fdd\u5b50\u7c7b\u9075\u5faa\u7279\u5b9a\u7684\u63a5\u53e3\u3002\u5982\u679c\u4f60\u5e0c\u671b\u901a\u8fc7\u7236\u7c7b\u63d0\u4f9b\u901a\u7528\u7684\u5b9e\u73b0\uff0c\u540c\u65f6\u4fdd\u7559\u5b50\u7c7b\u7684\u81ea\u5b9a\u4e49\u80fd\u529b\uff0c\u62bd\u8c61\u7c7b\u662f\u975e\u5e38\u5408\u9002\u7684\u9009\u62e9\u3002<\/p>\n\n\n\n
                  \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
                  \u62bd\u8c61\u7c7b\u662f Java \u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u5b83\u662f\u4e0d\u80fd\u5b9e\u4f8b\u5316\u7684\u7c7b\u3002\u62bd\u8c61\u7c7b\u4e3b\u8981\u7528\u4e8e\u63d0\u4f9b\u5b50\u7c7b\u7684\u901a\u7528\u884c\u4e3a\uff0c\u5e76\u8981\u6c42 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[],"class_list":["post-2232","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2232"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2232\/revisions"}],"predecessor-version":[{"id":2233,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2232\/revisions\/2233"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}