{"id":231,"date":"2023-11-20T09:15:29","date_gmt":"2023-11-20T01:15:29","guid":{"rendered":"http:\/\/ericw.top\/?p=231"},"modified":"2023-11-20T09:15:29","modified_gmt":"2023-11-20T01:15:29","slug":"java-%e7%bb%a7%e6%89%bf","status":"publish","type":"post","link":"http:\/\/ericw.top\/?p=231","title":{"rendered":"JAVA \u7ee7\u627f"},"content":{"rendered":"<h1 id=\"toc-0\">JAVA\u4e2d\u7684\u7ee7\u627f<\/h1>\n<p>\u7ee7\u627f\u4f7f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\u3002<br \/>\n\u5728JAVA\u4e2d\uff0c\u7ee7\u627f\u5141\u8bb8\u4e00\u4e2a\u7c7b\u4ece\u53e6\u4e00\u4e2a\u7c7b\u7ee7\u627f\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"toc-1\">\u4ec0\u4e48\u662f\u7ee7\u627f<\/h2>\n<p>\u7ee7\u627f\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u56db\u5927\u7279\u6027\u4e4b\u4e00\uff0c\uff08\u5c01\u88c5\u3001\u7ee7\u627f\u3001\u591a\u6001\u3001\u62bd\u8c61\uff09\u3002<\/p>\n<p>\u7ee7\u627f\u7684\u7279\u70b9\uff1a<\/p>\n<ul>\n<li><strong>\u4ee3\u7801\u91cd\u7528<\/strong>\uff1a\u53ef\u4ee5\u91cd\u7528\u73b0\u5728\u7684\u4ee3\u7801\uff0c\u65e0\u9700\u91cd\u65b0\u7f16\u5199\u76f8\u540c\u7684\u529f\u80fd\u3002<\/li>\n<li><strong>\u62d3\u5c55\u6027<\/strong>\uff1a\u53ef\u4ee5\u5728\u73b0\u6709\u7c7b\u57fa\u7840\u4e0a\uff0c\u521b\u5efa\u65b0\u7684\u7c7b\uff0c\u6ee1\u8db3\u4e0d\u540c\u9700\u6c42\u3002<\/li>\n<li><strong>\u7ef4\u62a4\u6027<\/strong>\uff1a\u9700\u8981\u5bf9\u591a\u4e2a\u7c7b\u505a\u66f4\u6539\uff0c\u53ea\u9700\u8981\u4fee\u6539\u7236\u7c7b\u5373\u53ef\u3002<\/li>\n<\/ul>\n<h2 id=\"toc-2\">JAVA\u4e2d\u7684\u7ee7\u627f<\/h2>\n<p>\u7ee7\u627f\u662f\u7531\u5173\u952e\u5b57<code class=\"prettyprint\" >extends<\/code>\u6765\u5b9e\u73b0\u3002\u5b50\u7c7b\u7ee7\u627f\u4e86\u7236\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b50\u7c7b\u6765\u8bbf\u95ee\u4ed6\u4eec\u3002<\/p>\n<h3 id=\"toc-3\">\u57fa\u672c\u8bed\u6cd5<\/h3>\n<p>\u9996\u5148\uff0c\u6709\u4e00\u4e2a\u7236\u7c7b<code class=\"prettyprint\" >Animal<\/code>\u548c\u4e00\u4e2a\u5b50\u7c7b<code class=\"prettyprint\" >Dog<\/code>\uff1a<\/p>\n<pre><code class=\"prettyprint\"  class=\"language-java\">class Animal {\n    String name;\n\n    void eat() {\n        System.out.println(name + &quot; is eating.&quot;);\n    }\n}\n\nclass Dog extends Animal {\n    void bark() {\n        System.out.println(name + &quot; is barking.&quot;);\n    }\n}<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0c<code class=\"prettyprint\" >Dog<\/code>\u5b50\u7c7b\u7ee7\u627f\u4e86\u7236\u7c7b<code class=\"prettyprint\" >Animal<\/code>\uff0c\u5f97\u5230\u4e86\u7236\u7c7b\u7684\u5c5e\u6027<code class=\"prettyprint\" >name<\/code>\u548c\u65b9\u6cd5<code class=\"prettyprint\" >eat()<\/code>\uff0c\u540c\u65f6\u521b\u5efa\u4e86\u81ea\u5df1\u7684\u65b9\u6cd5<code class=\"prettyprint\" >bark()<\/code>\u3002<\/p>\n<h3 id=\"toc-4\">\u8bbf\u95ee\u7236\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5<\/h3>\n<p>\u5728\u5b50\u7c7b\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528<code class=\"prettyprint\" >super<\/code>\u5173\u952e\u5b57\u6765\u8bbf\u95ee\u7236\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u4f8b\u5982\uff1a\u5b50\u7c7b\u4e2d\u7684<code class=\"prettyprint\" >bark()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7<code class=\"prettyprint\" >super.eat()<\/code>\u6765\u8c03\u7528\u7236\u7c7b\u7684<code class=\"prettyprint\" >Animal<\/code>\u7684<code class=\"prettyprint\" >eat()<\/code>\u65b9\u6cd5\u3002<\/p>\n<pre><code class=\"prettyprint\"  class=\"language-java\">class Dog extends Animal {\n    void bark() {\n        System.out.println(name + &quot; is barking.&quot;);\n        super.eat(); \/\/ \u8c03\u7528\u7236\u7c7b\u7684eat()\u65b9\u6cd5\n    }\n}<\/code><\/pre>\n<h3 id=\"toc-5\">\u65b9\u6cd5\u8986\u76d6<\/h3>\n<p>\u5b50\u7c7b\u53ef\u4ee5\u8986\u76d6\u7236\u7c7b\u7684\u65b9\u6cd5\uff0c\u8981\u8986\u76d6\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5b50\u7c7b\u5fc5\u987b\u5177\u6709\u76f8\u540c\u7684\u540d\u79f0\u3001\u8fd4\u56de\u7c7b\u578b\u548c\u53c2\u6570\u5217\u8868\u3002<br \/>\n\u4e0b\u9762\u662f\u4e00\u4e2a\u65b9\u6cd5\u8986\u76d6\u7684\u5b9e\u4f8b\uff1a<\/p>\n<pre><code class=\"prettyprint\"  class=\"language-java\">class Animal {\n    void makeSound() {\n        System.out.println(&quot;Animal makes a sound.&quot;);\n    }\n}\n\nclass Dog extends Animal {\n    @Override\n    void makeSound() {\n        System.out.println(&quot;Dog barks.&quot;);\n    }\n}<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c<code class=\"prettyprint\" >Dog<\/code>\u7c7b\u8986\u76d6\u4e86<code class=\"prettyprint\" >Animal<\/code>\u7c7b\u4e2d\u7684<code class=\"prettyprint\" >makeSound()<\/code>\u65b9\u6cd5\uff0c\u63d0\u4f9b\u4e86\u81ea\u5df1\u7684\u5b9e\u73b0\u3002<\/p>\n<h3 id=\"toc-6\">\u6784\u9020\u65b9\u6cd5\u7684\u7ee7\u627f<\/h3>\n<p>\u5b50\u7c7b\u53ef\u4ee5\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u6765\u521d\u59cb\u5316\u4ece\u7236\u7c7b\u7ee7\u627f\u7684\u5c5e\u6027\u3002\u5728\u5b50\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u4e2d\u4f7f\u7528<code class=\"prettyprint\" >super()<\/code>\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u3002<\/p>\n<pre><code class=\"prettyprint\"  class=\"language-java\">class Animal {\n    String name;\n\n    Animal(String name) {\n        this.name = name;\n    }\n}\n\nclass Dog extends Animal {\n    Dog(String name) {\n        super(name); \/\/ \u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\n    }\n}<\/code><\/pre>\n<h3 id=\"toc-7\">\u9632\u6b62\u7ee7\u627f<\/h3>\n<p>\u5982\u679c\u4f60\u60f3\u8981\u963b\u6b62\u67d0\u4e2a\u7c7b\u88ab\u7ee7\u627f\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528<code class=\"prettyprint\" >final<\/code>\u5173\u952e\u5b57\u6765\u6807\u8bb0\u8fd9\u4e2a\u7c7b<\/p>\n<pre><code class=\"prettyprint\"  class=\"language-java\">final class FinalClass {\n    \/\/ \u7c7b\u7684\u5185\u5bb9\n}<\/code><\/pre>\n<p><strong>\u6807\u8bb0\u4e3a<code class=\"prettyprint\" >final<\/code>\u7684\u7c7b\u4e0d\u80fd\u88ab\u7ee7\u627f<\/strong><\/p>\n<h2 id=\"toc-8\">\u7ee7\u627f\u7684\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u5728\u4f7f\u7528\u7ee7\u627f\u65f6\uff0c\u6709\u4e00\u4e9b\u9700\u8981\u6ce8\u610f\u7684\u4e8b\u9879\uff1a<\/p>\n<ul>\n<li>\n<p><strong>\u5355\u4e00\u7ee7\u627f\uff1a<\/strong> Java\u4e2d\u4e0d\u652f\u6301\u591a\u91cd\u7ee7\u627f\uff0c\u4e00\u4e2a\u7c7b\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u7236\u7c7b\u3002\u8fd9\u610f\u5473\u7740\u4e00\u4e2a\u7c7b\u4e0d\u80fd\u540c\u65f6\u7ee7\u627f\u591a\u4e2a\u7c7b\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u65b9\u6cd5\u8986\u76d6<\/strong>\uff1a \u5b50\u7c7b\u8986\u76d6\u7236\u7c7b\u65b9\u6cd5\u65f6\uff0c\u5fc5\u987b\u4fdd\u6301\u65b9\u6cd5\u540d\u79f0\u3001\u8fd4\u56de\u7c7b\u578b\u548c\u53c2\u6570\u5217\u8868\u7684\u4e00\u81f4\u6027\u3002\u5426\u5219\uff0c\u7f16\u8bd1\u5668\u5c06\u4f1a\u62a5\u9519\u3002<\/p>\n<\/li>\n<li>\n<p><strong>super\u5173\u952e\u5b57\uff1a<\/strong> \u5b50\u7c7b\u53ef\u4ee5\u4f7f\u7528 super \u5173\u952e\u5b57\u6765\u8bbf\u95ee\u7236\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u8fd9\u5728\u9700\u8981\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u6216\u8bbf\u95ee\u7236\u7c7b\u65b9\u6cd5\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u6784\u9020\u65b9\u6cd5\u7684\u8c03\u7528\uff1a <\/strong>\u5b50\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u53ef\u4ee5\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u4ee5\u786e\u4fdd\u4ece\u7236\u7c7b\u7ee7\u627f\u7684\u5c5e\u6027\u5f97\u5230\u6b63\u786e\u7684\u521d\u59cb\u5316\u3002<\/p>\n<\/li>\n<li>\n<p><strong>final\u5173\u952e\u5b57\uff1a<\/strong> \u4f7f\u7528 final \u5173\u952e\u5b57\u53ef\u4ee5\u9632\u6b62\u4e00\u4e2a\u7c7b\u88ab\u7ee7\u627f\uff0c\u6216\u8005\u9632\u6b62\u4e00\u4e2a\u65b9\u6cd5\u88ab\u8986\u76d6\u3002\u8fd9\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u5b89\u5168\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\uff1a<\/strong>\u9664\u4e86\u666e\u901a\u7684\u7c7b\u7ee7\u627f\uff0cJava\u8fd8\u652f\u6301\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u7684\u7ee7\u627f\u3002\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u7075\u6d3b\u6027\u548c\u591a\u6001\u6027\u3002<\/p>\n<\/li>\n<\/ul>\n<h2 id=\"toc-9\">\u603b\u7ed3<\/h2>\n<p><strong>\u7ee7\u627f\u662fJava\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5<\/strong>\uff0c\u5b83\u5141\u8bb8\u4e00\u4e2a\u7c7b\u7ee7\u627f\u53e6\u4e00\u4e2a\u7c7b\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u4ece\u800c\u5b9e\u73b0\u4ee3\u7801\u7684\u91cd\u7528\u548c\u6269\u5c55\u3002\u5728\u4f7f\u7528\u7ee7\u627f\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u65b9\u6cd5\u8986\u76d6\u3001\u6784\u9020\u65b9\u6cd5\u7684\u8c03\u7528\u3001super \u5173\u952e\u5b57\u7b49\u7ec6\u8282\u3002\u901a\u8fc7\u5408\u7406\u4f7f\u7528\u7ee7\u627f\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u7ec4\u7ec7\u548c\u7ba1\u7406\u4ee3\u7801\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684<strong>\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u6269\u5c55\u6027<\/strong>\u3002<\/p>\n<p>\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3aCSDN\u535a\u4e3b\u300c\u7e41\u4f9dFanyi\u300d\u7684\u539f\u521b\u6587\u7ae0\uff0c\u9075\u5faaCC 4.0 BY-SA\u7248\u6743\u534f\u8bae\uff0c\u8f6c\u8f7d\u8bf7\u9644\u4e0a\u539f\u6587\u51fa\u5904\u94fe\u63a5\u53ca\u672c\u58f0\u660e\u3002<br \/>\n\u539f\u6587\u94fe\u63a5\uff1a<a href=\"https:\/\/blog.csdn.net\/qq_21484461\/article\/details\/132675668\">https:\/\/blog.csdn.net\/qq_21484461\/article\/details\/132675668<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>JAVA\u4e2d\u7684\u7ee7\u627f \u7ee7\u627f\u4f7f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\u3002 \u5728JAVA\u4e2d\uff0c\u7ee7\u627f\u5141\u8bb8\u4e00\u4e2a\u7c7b\u4ece\u53e6\u4e00\u4e2a\u7c7b\u7ee7\u627f\u5c5e\u6027\u548c\u65b9\u6cd5\u3002 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":232,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,5],"tags":[],"_links":{"self":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/231"}],"collection":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=231"}],"version-history":[{"count":1,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/231\/revisions"}],"predecessor-version":[{"id":233,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/231\/revisions\/233"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/media\/232"}],"wp:attachment":[{"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=231"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}