{"id":202799,"date":"2025-05-22T08:04:02","date_gmt":"2025-05-22T00:04:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202799\/"},"modified":"2025-05-22T08:04:02","modified_gmt":"2025-05-22T00:04:02","slug":"java%e4%b8%ad%e5%87%bd%e6%95%b0%e7%9a%84%e8%ae%bf%e9%97%ae%e6%9d%83%e9%99%90%e5%a6%82%e4%bd%95%e5%ae%9a%e4%b9%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202799\/","title":{"rendered":"Java\u4e2d\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5b9a\u4e49"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u4e2d\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5b9a\u4e49<\/h1>\n<p>\u5927\u5bb6\u597d\uff0c\u4eca\u5929\u672c\u4eba\u7ed9\u5927\u5bb6\u5e26\u6765\u6587\u7ae0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava\u4e2d\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5b9a\u4e49\u300b<\/span>\uff0c\u6587\u4e2d\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span><\/span>\uff0c\u5982\u679c\u4f60\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u90a3\u5c31\u8bf7\u5404\u4f4d\u670b\u53cb\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427~\u5e0c\u671b\u80fd\u771f\u6b63\u5e2e\u5230\u4f60\u4eec\uff0c\u8c22\u8c22\uff01<\/p>\n<p>\u7b54\u6848\uff1a Java \u901a\u8fc7\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26\u5bf9\u51fd\u6570\u8bbf\u95ee\u6743\u9650\u5b9e\u884c\u4e25\u683c\u63a7\u5236\uff0c\u786e\u4fdd\u5b89\u5168\u6027\u548c\u5c01\u88c5\u6027\u3002\u8be6\u7ec6\u63cf\u8ff0\uff1a\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26\uff1apublic\u3001protected\u3001default\u3001private\u8bbe\u7f6e\u8bbf\u95ee\u6743\u9650\uff1a\u5728\u51fd\u6570\u58f0\u660e\u524d\u6dfb\u52a0\u4fee\u9970\u7b26\u5b9e\u6218\u6848\u4f8b\uff1aAnimal \u7c7b\u4e2d\u7684\u79c1\u6709\u51fd\u6570 eat() \u4ec5\u9650\u5185\u90e8\u8bbf\u95ee\uff0c\u53d7\u4fdd\u62a4\u7684\u51fd\u6570 makeSound() \u53ef\u88ab\u5b50\u7c7b\u8bbf\u95ee<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729943196671cd69c81d1c.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u4e2d\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u5b9a\u4e49<\/strong><\/p>\n<p><strong>\u7b80\u4ecb<\/strong><\/p>\n<p>Java \u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u8bed\u8a00\uff0c\u5b83\u63d0\u4f9b\u4e86\u5bf9\u51fd\u6570\u8bbf\u95ee\u6743\u9650\u7684\u4e25\u683c\u63a7\u5236\u3002\u901a\u8fc7\u4f7f\u7528\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26\uff0c\u60a8\u53ef\u4ee5\u5b9a\u4e49\u54ea\u4e9b\u7c7b\u3001\u5b50\u7c7b\u548c\u5305\u53ef\u4ee5\u8bbf\u95ee\u7279\u5b9a\u7684\u51fd\u6570\u3002<\/p>\n<p><strong>\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26<\/strong><\/p>\n<p>Java \u4e2d\u6709\u56db\u4e2a\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26\uff1a<\/p>\n<ul>\n<li><strong>public\uff1a<\/strong> \u51fd\u6570\u53ef\u4ee5\u5728\u4efb\u4f55\u7c7b\u3001\u5b50\u7c7b\u6216\u5305\u4e2d\u8bbf\u95ee\u3002<\/li>\n<li><strong>protected\uff1a<\/strong> \u51fd\u6570\u53ef\u4ee5\u5728\u540c\u4e00\u4e2a\u5305\u4e2d\u7684\u4efb\u4f55\u7c7b\u548c\u5b50\u7c7b\u4e2d\u8bbf\u95ee\u3002<\/li>\n<li><strong>default\uff08\u5305\u8bbf\u95ee\uff09\uff1a<\/strong> \u51fd\u6570\u53ea\u80fd\u5728\u540c\u4e00\u4e2a\u5305\u4e2d\u7684\u7c7b\u4e2d\u8bbf\u95ee\u3002<\/li>\n<li><strong>private\uff1a<\/strong> \u51fd\u6570\u53ea\u80fd\u5728\u5b9a\u4e49\u5b83\u7684\u7c7b\u4e2d\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n<p><strong>\u8bbe\u7f6e\u8bbf\u95ee\u6743\u9650<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u4f7f\u7528\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26\u8bbe\u7f6e\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u975e\u5e38\u7b80\u5355\u3002\u53ea\u9700\u5728\u51fd\u6570\u58f0\u660e\u4e4b\u524d\u6dfb\u52a0\u9002\u5f53\u7684\u4fee\u9970\u7b26\u5373\u53ef\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>public void publicMethod() {}\nprotected void protectedMethod() {}\nvoid defaultMethod() {}\nprivate void privateMethod() {}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u793a\u4f8b\uff1a<\/p>\n<pre>class Animal {\n    private void eat() {\n        \/\/ ...\n    }\n\n    public void makeSound() {\n        \/\/ ...\n    }\n}\n\nclass Dog extends Animal {\n    public void bark() {\n        makeSound(); \/\/ \u53ef\u4ee5\u8bbf\u95ee Animal \u7c7b\u4e2d\u7684 protected \u51fd\u6570\n    }\n}<\/pre>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code>Animal<\/code> \u7c7b\u4e2d\u7684 <code>eat()<\/code> \u51fd\u6570\u88ab\u58f0\u660e\u4e3a\u79c1\u6709\u7684\uff0c\u56e0\u6b64\u53ea\u80fd\u5728 <code>Animal<\/code> \u7c7b\u4e2d\u8bbf\u95ee\u3002\u53e6\u4e00\u65b9\u9762\uff0c<code>makeSound()<\/code> \u51fd\u6570\u88ab\u58f0\u660e\u4e3a\u516c\u5171\u7684\uff0c\u56e0\u6b64\u53ef\u4ee5\u4ece\u4efb\u4f55\u5730\u65b9\u8bbf\u95ee\uff0c\u5305\u62ec <code>Dog<\/code> \u5b50\u7c7b\u3002<code>Dog<\/code> \u7c7b\u4e2d\u7684 <code>bark()<\/code> \u51fd\u6570\u53ef\u4ee5\u8bbf\u95ee <code>makeSound()<\/code> \u51fd\u6570\uff0c\u56e0\u4e3a\u5b83\u4f4d\u4e8e\u540c\u4e00\u4e2a\u5305\u4e2d\uff0c\u5e76\u4e14 <code>makeSound()<\/code> \u51fd\u6570\u88ab\u58f0\u660e\u4e3a\u53d7\u4fdd\u62a4\u7684\u3002<\/p>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u7406\u89e3 Java \u4e2d\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u5bf9\u4e8e\u6784\u5efa\u5b89\u5168\u7684\u3001\u6a21\u5757\u5316\u7684\u5e94\u7528\u7a0b\u5e8f\u975e\u5e38\u91cd\u8981\u3002\u901a\u8fc7\u4f7f\u7528\u9002\u5f53\u7684\u8bbf\u95ee\u6743\u9650\u4fee\u9970\u7b26\uff0c\u60a8\u53ef\u4ee5\u63a7\u5236\u54ea\u4e9b\u7c7b\u548c\u5305\u53ef\u4ee5\u8bbf\u95ee\u7279\u5b9a\u7684\u51fd\u6570\uff0c\u4ece\u800c\u63d0\u9ad8\u5b89\u5168\u6027\u5e76\u4fc3\u8fdb\u5c01\u88c5\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aJava\u4e2d\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5b9a\u4e49\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u4e2d\u51fd\u6570\u7684\u8bbf\u95ee\u6743\u9650\u5982\u4f55\u5b9a\u4e49&#46;&#46;&#46;<\/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-202799","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202799","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=202799"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202799\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202799"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202799"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}