{"id":203947,"date":"2025-05-22T11:59:34","date_gmt":"2025-05-22T03:59:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203947\/"},"modified":"2025-05-22T11:59:34","modified_gmt":"2025-05-22T03:59:34","slug":"java-%e4%b8%ad%e7%a7%81%e6%9c%89%e6%88%96%e9%9d%99%e6%80%81%e6%96%b9%e6%b3%95%e5%8f%af%e4%bb%a5%e8%a2%ab%e9%87%8d%e5%86%99%e5%90%97%ef%bc%9f%e8%bf%99%e6%98%af%e6%82%a8%e9%9c%80%e8%a6%81%e4%ba%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203947\/","title":{"rendered":"Java \u4e2d\u79c1\u6709\u6216\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u88ab\u91cd\u5199\u5417\uff1f\u8fd9\u662f\u60a8\u9700\u8981\u4e86\u89e3\u7684\u5185\u5bb9"},"content":{"rendered":"

<\/b> <\/p>\n

Java \u4e2d\u79c1\u6709\u6216\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u88ab\u91cd\u5199\u5417\uff1f\u8fd9\u662f\u60a8\u9700\u8981\u4e86\u89e3\u7684\u5185\u5bb9<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587\u300aJava \u4e2d\u79c1\u6709\u6216\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u88ab\u91cd\u5199\u5417\uff1f\u8fd9\u662f\u60a8\u9700\u8981\u4e86\u89e3\u7684\u5185\u5bb9\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n

<\/p>\n

1. \u7406\u89e3java\u4e2d\u7684\u65b9\u6cd5\u91cd\u5199 <\/h2>\n

\u5728\u6df1\u5165\u7814\u7a76\u79c1\u6709\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5\u4e4b\u524d\uff0c\u4e86\u89e3 java \u4e2d\u65b9\u6cd5\u91cd\u5199\u7684\u57fa\u7840\u77e5\u8bc6\u81f3\u5173\u91cd\u8981\u3002 <\/p>\n

1.1 \u4ec0\u4e48\u662f\u65b9\u6cd5\u91cd\u5199\uff1f <\/h3>\n

\u5f53\u5b50\u7c7b\u4e3a\u5176\u8d85\u7c7b\u4e2d\u5df2\u5b9a\u4e49\u7684\u65b9\u6cd5\u63d0\u4f9b\u7279\u5b9a\u5b9e\u73b0\u65f6\uff0c\u5c31\u4f1a\u53d1\u751f\u65b9\u6cd5\u91cd\u5199\u3002\u8fd9\u5141\u8bb8\u5b50\u7c7b\u81ea\u5b9a\u4e49\u4ece\u7236\u7c7b\u7ee7\u627f\u7684\u65b9\u6cd5\u7684\u884c\u4e3a\u3002 <\/p>\n

    \n
  • \u5b50\u7c7b\u4e2d\u7684\u65b9\u6cd5\u5fc5\u987b\u4e0e\u8d85\u7c7b\u4e2d\u7684\u65b9\u6cd5\u5177\u6709\u76f8\u540c\u7684\u540d\u79f0\u3001\u8fd4\u56de\u7c7b\u578b\u548c\u53c2\u6570\u3002<\/li>\n
  • \u91cd\u5199\u7684\u65b9\u6cd5\u4e0d\u80fd\u5177\u6709\u6bd4\u8d85\u7c7b\u4e2d\u7684\u65b9\u6cd5\u66f4\u4e25\u683c\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u3002<\/li>\n
  • \u91cd\u5199\u7684\u65b9\u6cd5\u4e0d\u80fd\u5177\u6709\u6bd4\u8d85\u7c7b\u4e2d\u7684\u65b9\u6cd5\u66f4\u4e25\u683c\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u3002<\/li>\n<\/ul>\n

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

    class animal {\n    void makesound() {\n        system.out.println(\"animal makes a sound\");\n    }\n}\n\nclass dog extends animal {\n    @override\n    void makesound() {\n        system.out.println(\"dog barks\");\n    }\n}\n\npublic class main {\n    public static void main(string[] args) {\n        animal mydog = new dog();\n        mydog.makesound(); \/\/ outputs: dog barks\n    }\n}\n<\/pre>\n
     2. \u79c1\u6709\u65b9\u6cd5\u548c\u65b9\u6cd5\u91cd\u5199 <\/h2>\n
    \u79c1\u6709\u65b9\u6cd5\u5728\u5b9a\u4e49\u5b83\u4eec\u7684\u7c7b\u4e4b\u5916\u662f\u4e0d\u53ef\u8bbf\u95ee\u7684\u3002\u56e0\u6b64\uff0c\u5b83\u4eec\u4e0d\u80fd\u5728\u5b50\u7c7b\u4e2d\u88ab\u91cd\u5199\u3002\u5f53\u5b50\u7c7b\u5b9a\u4e49\u4e0e\u8d85\u7c7b\u4e2d\u7684\u79c1\u6709\u65b9\u6cd5\u540c\u540d\u7684\u65b9\u6cd5\u65f6\uff0c\u5b83\u4e0d\u88ab\u89c6\u4e3a\u91cd\u5199\uff0c\u800c\u662f\u7279\u5b9a\u4e8e\u5b50\u7c7b\u7684\u65b0\u65b9\u6cd5\u3002 <\/p>\n
     2.1 \u4e3a\u4ec0\u4e48\u79c1\u6709\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199 <\/h3>\n
    \u79c1\u6709\u65b9\u6cd5\u5bf9\u4e8e\u9664\u5b83\u4eec\u81ea\u5df1\u4e4b\u5916\u7684\u4efb\u4f55\u7c7b\u90fd\u662f\u9690\u85cf\u7684\u3002 java \u7f16\u8bd1\u5668\u5c06\u79c1\u6709\u65b9\u6cd5\u89c6\u4e3a\u5b9a\u4e49\u5b83\u4eec\u7684\u7c7b\u7684\u4e00\u90e8\u5206\uff0c\u800c\u4e0d\u662f\u7c7b\u5c42\u6b21\u7ed3\u6784\u7684\u4e00\u90e8\u5206\u3002\u56e0\u6b64\uff0c\u5b50\u7c7b\u65e0\u6cd5\u8bbf\u95ee\u6216\u91cd\u5199\u8fd9\u4e9b\u65b9\u6cd5\u3002 <\/p>\n
    \u793a\u4f8b\uff1a<\/strong><\/p>\n
    class parent {\n    private void privatemethod() {\n        system.out.println(\"private method in parent\");\n    }\n}\n\nclass child extends parent {\n    \/\/ this is not an override, but a new method in child\n    private void privatemethod() {\n        system.out.println(\"private method in child\");\n    }\n}\n\npublic class main {\n    public static void main(string[] args) {\n        parent obj = new child();\n        \/\/ obj.privatemethod(); \/\/ compilation error: privatemethod() has private access in parent\n    }\n}\n<\/pre>\n
     2.2 \u8bbf\u95ee\u5b50\u7c7b\u4e2d\u7684\u79c1\u6709\u65b9\u6cd5 <\/h3>\n
    \u867d\u7136\u5b50\u7c7b\u4e0d\u80fd\u91cd\u5199\u79c1\u6709\u65b9\u6cd5\uff0c\u4f46\u5b83\u4eec\u53ef\u4ee5\u62e5\u6709\u81ea\u5df1\u7684\u540c\u540d\u79c1\u6709\u65b9\u6cd5\u3002\u8fd9\u4e0d\u4f1a\u5f71\u54cd\u8d85\u7c7b\u7684\u79c1\u6709\u65b9\u6cd5\uff0c\u5e76\u88ab\u89c6\u4e3a\u5177\u6709\u76f8\u540c\u540d\u79f0\u4f46\u4e0d\u540c\u4f5c\u7528\u57df\u7684\u65b9\u6cd5\u3002 <\/p>\n
     3. \u9759\u6001\u65b9\u6cd5\u548c\u65b9\u6cd5\u91cd\u5199 <\/h2>\n
    \u9759\u6001\u65b9\u6cd5\u5c5e\u4e8e\u7c7b\uff0c\u800c\u4e0d\u662f\u7c7b\u7684\u5b9e\u4f8b\u3002\u5b83\u4eec\u5728\u7f16\u8bd1\u65f6\u6839\u636e\u5f15\u7528\u7c7b\u578b\u800c\u4e0d\u662f\u5bf9\u8c61\u7c7b\u578b\u8fdb\u884c\u89e3\u6790\u3002\u56e0\u6b64\uff0c\u9759\u6001\u65b9\u6cd5\u4e0d\u80fd\u88ab\u4f20\u7edf\u610f\u4e49\u4e0a\u7684\u91cd\u5199\u3002 <\/p>\n
     3.1 \u9759\u6001\u65b9\u6cd5\u9690\u85cf <\/h3>\n
    \u5f53\u5b50\u7c7b\u5b9a\u4e49\u4e86\u4e0e\u8d85\u7c7b\u4e2d\u7684\u9759\u6001\u65b9\u6cd5\u540c\u540d\u7684\u9759\u6001\u65b9\u6cd5\u65f6\uff0c\u79f0\u4e3a\u9759\u6001\u65b9\u6cd5\u9690\u85cf\uff0c\u800c\u4e0d\u662f\u91cd\u5199\u3002\u5b50\u7c7b\u4e2d\u7684\u65b9\u6cd5\u9690\u85cf\u4e86\u8d85\u7c7b\u4e2d\u7684\u65b9\u6cd5\u3002 <\/p>\n
    \u793a\u4f8b\uff1a<\/strong><\/p>\n
    class Parent {\n    static void staticMethod() {\n        System.out.println(\"Static method in Parent\");\n    }\n}\n\nclass Child extends Parent {\n    static void staticMethod() {\n        System.out.println(\"Static method in Child\");\n    }\n}\n\npublic class Main {\n    public static void main(String[] args) {\n        Parent.staticMethod(); \/\/ Outputs: Static method in Parent\n        Child.staticMethod(); \/\/ Outputs: Static method in Child\n    }\n}\n<\/pre>\n
     3.2 \u9759\u6001\u65b9\u6cd5\u9690\u85cf\u7684\u542b\u4e49 <\/h3>\n
    \u9759\u6001\u65b9\u6cd5\u9690\u85cf\u662f\u6307\u8c03\u7528\u7684\u65b9\u6cd5\u662f\u7531\u5f15\u7528\u7684\u7c7b\u51b3\u5b9a\u7684\uff0c\u800c\u4e0d\u662f\u5b9e\u9645\u7684\u5bf9\u8c61\u3002\u5982\u679c\u6ca1\u6709\u6b63\u786e\u7406\u89e3\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6df7\u4e71\u3002 <\/p>\n
     4. \u7ed3\u8bba <\/h2>\n
    \u603b\u4e4b\uff0cjava \u4e2d\u7684\u79c1\u6709\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199\uff0c\u56e0\u4e3a\u5b83\u4eec\u5728\u81ea\u5df1\u7684\u7c7b\u4e4b\u5916\u662f\u4e0d\u53ef\u8bbf\u95ee\u7684\u3002\u9759\u6001\u65b9\u6cd5\u4e5f\u4e0d\u80fd\u88ab\u91cd\u5199\uff0c\u4f46\u53ef\u4ee5\u9690\u85cf\u5728\u5b50\u7c7b\u4e2d\u3002\u7406\u89e3\u8fd9\u4e9b\u89c4\u5219\u5bf9\u4e8e java \u4e2d\u6709\u6548\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u81f3\u5173\u91cd\u8981\u3002 <\/p>\n
    \u5982\u679c\u60a8\u5bf9 java \u4e2d\u7684\u65b9\u6cd5\u91cd\u5199\u3001\u79c1\u6709\u65b9\u6cd5\u6216\u9759\u6001\u65b9\u6cd5\u6709\u4efb\u4f55\u7591\u95ee\u6216\u9700\u8981\u8fdb\u4e00\u6b65\u8bf4\u660e\uff0c\u8bf7\u968f\u65f6\u5728\u4e0b\u9762\u53d1\u8868\u8bc4\u8bba\uff01 <\/p>\n
    \u9605\u8bfb\u66f4\u591a\u6587\u7ae0<\/strong>\uff1a\u79c1\u6709\u6216\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u5728 java \u4e2d\u88ab\u91cd\u5199\u5417\uff1f\u8fd9\u662f\u4f60\u9700\u8981\u77e5\u9053\u7684<\/p>\n
    \u4eca\u5929\u5173\u4e8e\u300aJava \u4e2d\u79c1\u6709\u6216\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u88ab\u91cd\u5199\u5417\uff1f\u8fd9\u662f\u60a8\u9700\u8981\u4e86\u89e3\u7684\u5185\u5bb9\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n
          \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"
    Java \u4e2d\u79c1\u6709\u6216\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u88ab...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203947","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203947","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203947"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203947\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203947"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203947"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203947"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}