{"id":202967,"date":"2025-05-22T10:50:53","date_gmt":"2025-05-22T02:50:53","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202967\/"},"modified":"2025-05-22T10:50:53","modified_gmt":"2025-05-22T02:50:53","slug":"java%e5%87%bd%e6%95%b0%e7%9a%84%e5%8f%82%e6%95%b0%e6%98%af%e5%90%a6%e5%8f%af%e4%bb%a5%e6%9c%89%e9%bb%98%e8%ae%a4%e4%bf%ae%e9%a5%b0%e7%ac%a6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202967\/","title":{"rendered":"Java\u51fd\u6570\u7684\u53c2\u6570\u662f\u5426\u53ef\u4ee5\u6709\u9ed8\u8ba4\u4fee\u9970\u7b26\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u7684\u53c2\u6570\u662f\u5426\u53ef\u4ee5\u6709\u9ed8\u8ba4\u4fee\u9970\u7b26\uff1f<\/h1>\n<p>IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300aJava\u51fd\u6570\u7684\u53c2\u6570\u662f\u5426\u53ef\u4ee5\u6709\u9ed8\u8ba4\u4fee\u9970\u7b26\uff1f\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n<p>Java \u51fd\u6570\u53c2\u6570\u53ef\u4ee5\u6709\u9ed8\u8ba4\u4fee\u9970\u7b26\uff0c\u552f\u4e00\u5141\u8bb8\u7684\u53c2\u6570\u4fee\u9970\u7b26\u662f final\uff0c\u5b83\u5f3a\u5236\u6267\u884c\u53c2\u6570\u4e0d\u53ef\u53d8\u6027\uff0c\u9632\u6b62\u5728\u65b9\u6cd5\u5185\u4fee\u6539\u5176\u503c\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730007877671dd345de19d.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u53c2\u6570\u662f\u5426\u53ef\u4ee5\u6709\u9ed8\u8ba4\u4fee\u9970\u7b26\uff1f<\/strong><\/p>\n<p>Java \u51fd\u6570\u53c2\u6570\u53ef\u4ee5\u6709\u9ed8\u8ba4\u4fee\u9970\u7b26\u3002<strong>final<\/strong> \u662f\u552f\u4e00\u5141\u8bb8\u7684\u53c2\u6570\u4fee\u9970\u7b26\u3002<\/p>\n<p>\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre>public void myMethod(final int x, final String y) {\n    \/\/ ...\n}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u51fd\u6570\uff1a<\/p>\n<pre>public void printName(String name) {\n    System.out.println(\"Name: \" + name);\n}<\/pre>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0 <code>final<\/code> \u4fee\u9970\u7b26\u6765\u5f3a\u5236\u6267\u884c\u540d\u79f0\u4e0d\u53ef\u53d8\uff1a<\/p>\n<pre>public void printName(final String name) {\n    \/\/ name cannot be modified inside the method\n    System.out.println(\"Name: \" + name);\n}<\/pre>\n<p>\u73b0\u5728\uff0c\u4efb\u4f55\u5c1d\u8bd5\u4fee\u6539 <code>name<\/code> \u7684\u5c1d\u8bd5\u90fd\u5c06\u5bfc\u81f4\u7f16\u8bd1\u65f6\u9519\u8bef\uff1a<\/p>\n<pre>public class Main {\n    public static void main(String[] args) {\n        final String name = \"John Doe\";\n        printName(name);\n        name = \"Jane Doe\";  \/\/ Compile error: cannot assign a value to a final variable\n    }\n    \n    public static void printName(final String name) {\n        System.out.println(\"Name: \" + name);\n    }\n}<\/pre>\n<p>\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u7684\u53c2\u6570\u662f\u5426\u53ef\u4ee5\u6709\u9ed8\u8ba4&#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-202967","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202967","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=202967"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202967\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202967"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202967"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202967"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}