{"id":202873,"date":"2025-05-22T11:31:37","date_gmt":"2025-05-22T03:31:37","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202873\/"},"modified":"2025-05-22T11:31:37","modified_gmt":"2025-05-22T03:31:37","slug":"%e5%9c%a8-java-%e6%b3%9b%e5%9e%8b%e4%b8%ad%e4%bd%bf%e7%94%a8-varargs-%e5%8f%82%e6%95%b0%e6%9c%89%e5%93%aa%e4%ba%9b%e9%99%90%e5%88%b6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202873\/","title":{"rendered":"\u5728 Java \u6cdb\u578b\u4e2d\u4f7f\u7528 varargs \u53c2\u6570\u6709\u54ea\u4e9b\u9650\u5236\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5728 Java \u6cdb\u578b\u4e2d\u4f7f\u7528 varargs \u53c2\u6570\u6709\u54ea\u4e9b\u9650\u5236\uff1f<\/h1>\n<p>\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5728 Java \u6cdb\u578b\u4e2d\u4f7f\u7528 varargs \u53c2\u6570\u6709\u54ea\u4e9b\u9650\u5236\uff1f\u300b<\/span>\u4e3b\u8981\u8bb2\u89e3\u4e86<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n<p>\u5728 Java \u6cdb\u578b\u4e2d\u4f7f\u7528 varargs \u53c2\u6570\u5b58\u5728\u9650\u5236\uff1a\u4e0d\u80fd\u4f7f\u7528\u539f\u59cb\u7c7b\u578b\uff08\u9650\u5236 1\uff09\uff1b\u4e0d\u80fd\u4e0e\u5176\u4ed6\u7c7b\u578b\u53c2\u6570\u91cd\u53e0\uff08\u9650\u5236 2\uff09\uff1b\u4e0d\u80fd\u4f5c\u4e3a\u7b2c\u4e00\u4e2a\u53c2\u6570\uff08\u9650\u5236 3\uff09\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729953456671cfeb00bcde.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u6cdb\u578b\u4e2d\u4f7f\u7528 varargs \u53c2\u6570\u7684\u9650\u5236<\/strong><\/p>\n<p><strong>\u7b80\u4ecb<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u53d8\u957f\u53c2\u6570\uff08varargs\uff09\u5141\u8bb8\u6211\u4eec\u5728\u65b9\u6cd5\u53c2\u6570\u5217\u8868\u4e2d\u6307\u5b9a\u4efb\u610f\u6570\u91cf\u7684\u53c2\u6570\u3002\u6cdb\u578b\u4f7f\u6211\u4eec\u80fd\u591f\u521b\u5efa\u72ec\u7acb\u4e8e\u7c7b\u578b\u5982\u4e0b\u9762\u7684 <code>printArray()<\/code> \u65b9\u6cd5\u7684\u4ee3\u7801\uff1a<\/p>\n<pre>public static &lt;T&gt; void printArray(T... values) {\n    for (T value : values) {\n        System.out.print(value + \" \");\n    }\n    System.out.println();\n}<\/pre>\n<p>\u7136\u800c\uff0c\u5728\u6cdb\u578b\u4e2d\u4f7f\u7528 varargs \u53c2\u6570\u5b58\u5728\u67d0\u4e9b\u9650\u5236\u3002<\/p>\n<p><strong>\u9650\u5236 1\uff1a\u4e0d\u80fd\u4f7f\u7528\u539f\u59cb\u7c7b\u578b<\/strong><\/p>\n<p>varargs \u53c2\u6570\u4e0d\u80fd\u662f\u539f\u59cb\u7c7b\u578b\uff08\u5982 <code>int<\/code>\u3001<code>float<\/code>\uff09\u3002\u5fc5\u987b\u4f7f\u7528\u5b83\u4eec\u7684\u5305\u88c5\u7c7b\u578b\uff08\u5982 <code>Integer<\/code>\u3001<code>Float<\/code>\uff09\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u5c06\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\uff1a<\/p>\n<pre>public static &lt;T&gt; void printArray(T... values) {\n    \/\/ \u4ee5\u4e0b\u4ee3\u7801\u56e0\u539f\u59cb\u7c7b\u578b int \u65e0\u6cd5\u7528\u4f5c varargs \u53c2\u6570\u800c\u4ea7\u751f\u7f16\u8bd1\u9519\u8bef\n    for (int value : values) {\n        System.out.print(value + \" \");\n    }\n    System.out.println();\n}<\/pre>\n<p><strong>\u9650\u5236 2\uff1a\u4e0d\u80fd\u4e0e\u5176\u4ed6\u7c7b\u578b\u53c2\u6570\u91cd\u53e0<\/strong><\/p>\n<p>\u5982\u679c\u6cdb\u578b\u65b9\u6cd5\u5177\u6709\u591a\u4e2a\u7c7b\u578b\u53c2\u6570\uff0c\u5219 varargs \u53c2\u6570\u4e0d\u80fd\u4e0e\u4efb\u4f55\u5176\u4ed6\u7c7b\u578b\u53c2\u6570\u7684\u7c7b\u578b\u76f8\u540c\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u5c06\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\uff1a<\/p>\n<pre>public static &lt;T, U&gt; void printArray(T value, U... values) {\n    \/\/ \u4ee5\u4e0b\u4ee3\u7801\u56e0 varargs \u53c2\u6570 U \u4e0e\u7c7b\u578b\u53c2\u6570 U \u91cd\u53e0\u800c\u4ea7\u751f\u7f16\u8bd1\u9519\u8bef\n    for (U value : values) {\n        System.out.print(value + \" \");\n    }\n    System.out.println();\n}<\/pre>\n<p><strong>\u9650\u5236 3\uff1a\u4e0d\u80fd\u4f5c\u4e3a\u7b2c\u4e00\u4e2a\u53c2\u6570<\/strong><\/p>\n<p>varargs \u53c2\u6570\u4e0d\u80fd\u662f\u6cdb\u578b\u65b9\u6cd5\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u5c06\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\uff1a<\/p>\n<pre>public static &lt;T&gt; void printArray(T... values, T first) {\n    \/\/ \u4ee5\u4e0b\u4ee3\u7801\u56e0 varargs \u53c2\u6570\u4e0d\u80fd\u662f\u7b2c\u4e00\u4e2a\u53c2\u6570\u800c\u4ea7\u751f\u7f16\u8bd1\u9519\u8bef\n    for (T value : values) {\n        System.out.print(value + \" \");\n    }\n    System.out.println(first);\n}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u793a\u4f8b\uff0c\u6211\u4eec\u5728\u5176\u4e2d\u4f7f\u7528 <code>printArray()<\/code> \u65b9\u6cd5\u6253\u5370\u4e0d\u540c\u7c7b\u578b\u5143\u7d20\u7684\u6570\u7ec4\uff1a<\/p>\n<pre>\/\/ \u4f7f\u7528 varargs \u53c2\u6570\u6253\u5370 Integer \u6570\u7ec4\nInteger[] numbers = {1, 2, 3, 4, 5};\nprintArray(numbers);\n\n\/\/ \u4f7f\u7528 varargs \u53c2\u6570\u6253\u5370 String \u6570\u7ec4\nString[] names = {\"Alice\", \"Bob\", \"Carol\", \"Dave\", \"Eve\"};\nprintArray(names);<\/pre>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>1 2 3 4 5\nAlice Bob Carol Dave Eve<\/pre>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p><strong>Varargs \u53c2\u6570\u9650\u5236\u603b\u7ed3\uff1a<\/strong><\/p>\n<ol>\n<li>\u4e0d\u80fd\u4f7f\u7528\u539f\u59cb\u7c7b\u578b\u3002<\/li>\n<li>\u4e0d\u80fd\u4e0e\u5176\u4ed6\u7c7b\u578b\u53c2\u6570\u91cd\u53e0\u3002<\/li>\n<li>\u4e0d\u80fd\u4f5c\u4e3a\u7b2c\u4e00\u4e2a\u53c2\u6570\u3002<\/li>\n<\/ol>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u5728 Java \u6cdb\u578b\u4e2d\u4f7f\u7528 varargs \u53c2\u6570\u6709\u54ea\u4e9b\u9650\u5236\uff1f\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\u4e8ejava,\u6cdb\u578b\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Java \u6cdb\u578b\u4e2d\u4f7f\u7528 var&#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-202873","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202873","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=202873"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202873\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}