{"id":442,"date":"2025-11-27T11:01:41","date_gmt":"2025-11-27T03:01:41","guid":{"rendered":"http:\/\/43.139.99.192\/?p=442"},"modified":"2025-11-28T16:13:16","modified_gmt":"2025-11-28T08:13:16","slug":"%e4%b8%aa%e4%ba%ba%e5%ad%a6%e4%b9%a0","status":"publish","type":"post","link":"http:\/\/43.139.99.192\/index.php\/2025\/11\/27\/%e4%b8%aa%e4%ba%ba%e5%ad%a6%e4%b9%a0\/","title":{"rendered":"\u4e2a\u4eba\u5b66\u4e60"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">1\u91cd\u8f7d\u548c\u91cd\u5199\u7684\u533a\u522b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u5199\uff08Override\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u5b57\u9762\u4e0a\u770b\uff0c\u91cd\u5199\u5c31\u662f\u91cd\u65b0\u5199\u4e00\u904d\u7684\u610f\u601d\u3002\u5176\u5b9e\u5c31\u662f\u5728\u5b50\u7c7b\u4e2d\u628a\u7236\u7c7b\u672c\u8eab\u6709\u7684\u65b9\u6cd5\u91cd\u5199\u5199\u4e00\u904d\u3002\u5b50\u7c7b\u7ee7\u627f\u4e86\u7236\u7c7b\u539f\u6709\u7684\u65b9\u6cd5\uff0c\u4f46\u6709\u65f6\u5b50\u7c7b\u5e76\u4e0d\u60f3\u539f\u5c01\u4e0d\u52a8\u7684\u7ee7\u627f\u7236\u7c7b\u4e2d\u7684\u67d0\u4e2a\u65b9\u6cd5\uff0c\u6240\u4ee5\u5728\u65b9\u6cd5\u540d\uff0c\u53c2\u6570\u5217\u8868\uff0c\u8fd4\u56de\u7c7b\u578b\uff08\u9664\u8fc7\u5b50\u7c7b\u4e2d\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662f\u7236\u7c7b\u4e2d\u65b9\u6cd5\u8fd4\u56de\u503c\u7684\u5b50\u7c7b\u65f6\uff09\u90fd\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\uff0c\u5bf9\u65b9\u6cd5\u4f53\u8fdb\u884c\u4fee\u6539\u6216\u91cd\u5199\uff0c\u8fd9\u5c31\u662f\u91cd\u5199\u3002\u4f46\u8981\u6ce8\u610f\u5b50\u7c7b\u51fd\u6570\u7684\u8bbf\u95ee\u4fee\u9970\u6743\u9650\u4e0d\u80fd\u5c11\u4e8e\u7236\u7c7b\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Father {\n\n    public static void main(String&#91;] args) {\n        \/\/ TODO Auto-generated method stub\n        Son s = new Son();\n        s.sayHello();\n    }\n\n    public void sayHello() {\n        System.out.println(\"Hello\");\n    }\n}\n\nclass Son extends Father{\n\n    @Override\n    public void sayHello() {\n    \u3001    \/\/ TODO Auto-generated method stub\n        System.out.println(\"hello by \");\n    }\n\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"> <strong>\u91cd\u5199 \u603b\u7ed3\uff1a<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u5199\u65b9\u6cd5\u4e00\u5b9a\u4e0d\u80fd\u629b\u51fa\u65b0\u7684\u68c0\u67e5\u5f02\u5e38\u6216\u8005\u6bd4\u88ab\u91cd\u5199\u65b9\u6cd5\u7533\u660e\u66f4\u52a0\u5bbd\u6cdb\u7684\u68c0\u67e5\u578b\u5f02\u5e38<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53d1\u751f\u5728\u7236\u7c7b\u4e0e\u5b50\u7c7b\u4e4b\u95f4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b9\u6cd5\u540d\uff0c\u53c2\u6570\u5217\u8868\uff0c\u8fd4\u56de\u7c7b\u578b\uff08\u9664\u8fc7\u5b50\u7c7b\u4e2d\u65b9\u6cd5\u7684\u8fd4\u56de\u7c7b\u578b\u662f\u7236\u7c7b\u4e2d\u8fd4\u56de\u7c7b\u578b\u7684\u5b50\u7c7b\uff09\u5fc5\u987b\u76f8\u540c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u9650\u5236\u4e00\u5b9a\u8981\u5927\u4e8e\u88ab\u91cd\u5199\u65b9\u6cd5\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\uff08public&gt;protected&gt;default&gt;private)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2\u91cd\u8f7d\uff08overload\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u540c\u540d\u7684\u65b9\u6cd5\u5982\u679c\u6709\u4e0d\u540c\u7684\u53c2\u6570\u5217\u8868\uff08\u53c2\u6570\u7c7b\u578b\u4e0d\u540c\/\u53c2\u6570\u4e2a\u6570\u4e0d\u540c\u751a\u81f3\u662f\u53c2\u6570\u987a\u5e8f\u4e0d\u540c\uff09\u5219\u89c6\u4e3a\u91cd\u8f7d\u3002\u540c\u65f6\uff0c\u91cd\u8f7d\u5bf9\u8fd4\u56de\u7c7b\u578b\u6ca1\u6709\u8981\u6c42\uff0c\u53ef\u4ee5\u76f8\u540c\u4e5f\u53ef\u4ee5\u4e0d\u540c\uff0c\u4f46\u4e0d\u80fd\u901a\u8fc7\u8fd4\u56de\u7c7b\u578b\u662f\u5426\u76f8\u540c\u6765\u5224\u65ad\u91cd\u8f7d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Father {\n\n    public static void main(String&#91;] args) {\n        \/\/ TODO Auto-generated method stub\n        Father s = new Father();\n        s.sayHello();\n        s.sayHello(\"wintershii\");\n\n    }\n\n    public void sayHello() {\n        System.out.println(\"Hello\");\n    }\n\n    public void sayHello(String name) {\n        System.out.println(\"Hello\" + \" \" + name);\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8f7d\u603b\u7ed3\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8f7doverload\u662f\u4e00\u4e2a\u7c7b\u4e2d\u591a\u6001\u6027\u7684\u4e00\u79cd\u8868\u73b0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8f7d\u8981\u6c42\u540c\u540d\u65b9\u6cd5\u7684\u53c2\u6570\u5217\u8868\u4e0d\u540c\uff08\u53c2\u6570\u7c7b\u578b\uff0c\u53c2\u6570\u4e2a\u6570\u751a\u81f3\u662f\u53c2\u6570\u987a\u5e8f\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8f7d\u7684\u65f6\u5019\uff0c\u8fd4\u56de\u503c\u7c7b\u578b\u53ef\u4ee5\u76f8\u540c\u4e5f\u53ef\u4ee5\u4e0d\u540c\u3002\u65e0\u6cd5\u4ee5\u8fd4\u56de\u7c7b\u578b\u4f5c\u4e3a\u91cd\u8f7d\u51fd\u6570\u7684\u533a\u5206\u6807\u51c6<\/p>\n\n\n\n<p 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class=\"wp-block-paragraph\">\u7b54\uff1a\u65b9\u6cd5\u7684\u91cd\u8f7d\u548c\u91cd\u5199\u90fd\u662f\u5b9e\u73b0\u591a\u6001\u7684\u65b9\u5f0f\uff0c\u533a\u522b\u5728\u4e8e\u524d\u8005\u5b9e\u73b0\u7684\u65f6\u7f16\u8bd1\u65f6\u7684\u591a\u6001\u6027\uff0c\u800c\u540e\u8005\u5b9e\u73b0\u7684\u662f\u8fd0\u884c\u65f6\u7684\u591a\u6001\u6027\u3002\u91cd\u8f7d\u53d1\u751f\u5728\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u540c\u540d\u7684\u65b9\u6cd5\u5982\u679c\u6709\u4e0d\u540c\u7684\u53c2\u6570\u5217\u8868\uff08\u53c2\u6570\u7c7b\u578b\u4e0d\u540c\/\u53c2\u6570\u4e2a\u6570\u4e0d\u540c\u6216\u8005\u4e8c\u8005\u90fd\u4e0d\u540c\uff09\u5219\u89c6\u4e3a\u91cd\u8f7d\uff1b\u91cd\u5199\u53d1\u751f\u5728\u5b50\u7c7b\u548c\u7236\u7c7b\u4e4b\u95f4\uff0c\u91cd\u5199\u8981\u6c42\u5b50\u7c7b\u88ab\u91cd\u5199\u65b9\u6cd5\u4e0e\u7236\u7c7b\u88ab\u91cd\u5199\u65b9\u6cd5\u6709\u76f8\u540c\u7684\u53c2\u6570\u5217\u8868\uff0c\u6709\u517c\u5bb9\u7684\u8fd4\u56de\u7c7b\u578b\uff0c\u6bd4\u7236\u7c7b\u88ab\u91cd\u5199\u65b9\u6cd5\u66f4\u597d\u8bbf\u95ee\uff0c\u4e0d\u80fd\u6bd4\u7236\u7c7b\u88ab\u91cd\u5199\u65b9\u6cd5\u58f0\u660e\u66f4\u591a\u7684\u5f02\u5e38\u3002\u91cd\u8f7d\u5bf9\u8fd4\u56de\u7c7b\u578b\u6ca1\u6709\u7279\u6b8a\u7684\u8981\u6c42\uff0c\u4e0d\u80fd\u6839\u636e\u8fd4\u56de\u7c7b\u578b\u8fdb\u884c\u533a\u5206\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/43.139.99.192\/wp-content\/uploads\/2025\/11\/image-3.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"831\" height=\"417\" data-original=\"http:\/\/43.139.99.192\/wp-content\/uploads\/2025\/11\/image-3.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-449\"  sizes=\"auto, (max-width: 831px) 100vw, 831px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">String\u3001StringBuffer\u3001StringBuilder\u6bd4\u8f83\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e09\u8005\u5171\u540c\u4e4b\u5904:\u90fd\u662ffinal\u7c7b,\u4e0d\u5141\u8bb8\u88ab\u7ee7\u627f\uff0c\u4e3b\u8981\u662f\u4ece\u6027\u80fd\u548c\u5b89\u5168\u6027\u4e0a\u8003\u8651\u7684\uff0c\u56e0\u4e3a\u8fd9\u51e0\u4e2a\u7c7b\u90fd\u662f\u7ecf\u5e38\u88ab\u4f7f\u7528\u7740\uff0c\u4e14\u8003\u8651\u5230\u9632\u6b62\u5176\u4e2d\u7684\u53c2\u6570\u88ab\u53c2\u6570\u4fee\u6539\u5f71\u54cd\u5230\u5176\u4ed6\u7684\u5e94\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">StringBuffer\u662f\u7ebf\u7a0b\u5b89\u5168\uff0c\u53ef\u4ee5\u4e0d\u9700\u8981\u989d\u5916\u7684\u540c\u6b65\u7528\u4e8e\u591a\u7ebf\u7a0b\u4e2d;<br>StringBuilder\u662f\u975e\u540c\u6b65,\u8fd0\u884c\u4e8e\u591a\u7ebf\u7a0b\u4e2d\u5c31\u9700\u8981\u4f7f\u7528\u7740\u5355\u72ec\u540c\u6b65\u5904\u7406\uff0c\u4f46\u662f\u901f\u5ea6\u5c31\u6bd4StringBuffer\u5feb\u591a\u4e86;<br>StringBuffer\u4e0eStringBuilder\u4e24\u8005\u5171\u540c\u4e4b\u5904:\u53ef\u4ee5\u901a\u8fc7append\u3001indert\u8fdb\u884c\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u3002<br>String\u5b9e\u73b0\u4e86\u4e09\u4e2a\u63a5\u53e3:Serializable\u3001Comparable\u3001CarSequence<br>StringBuilder\u53ea\u5b9e\u73b0\u4e86\u4e24\u4e2a\u63a5\u53e3Serializable\u3001CharSequence\uff0c\u76f8\u6bd4\u4e4b\u4e0bString\u7684\u5b9e\u4f8b\u53ef\u4ee5\u901a\u8fc7compareTo\u65b9\u6cd5\u8fdb\u884c\u6bd4\u8f83\uff0c\u5176\u4ed6\u4e24\u4e2a\u4e0d\u53ef\u4ee5\u3002<br>7\u3001\u8fd0\u884c\u901f\u5ea6<br>\u6267\u884c\u901f\u5ea6\u7531\u5feb\u5230\u6162\uff1aStringBuilder 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