{"id":202803,"date":"2025-05-22T10:17:44","date_gmt":"2025-05-22T02:17:44","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202803\/"},"modified":"2025-05-22T10:17:44","modified_gmt":"2025-05-22T02:17:44","slug":"varargs-%e5%8f%82%e6%95%b0%e5%9c%a8%e9%9b%86%e5%90%88%e6%a1%86%e6%9e%b6%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8%e5%9c%ba%e6%99%af%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202803\/","title":{"rendered":"varargs \u53c2\u6570\u5728\u96c6\u5408\u6846\u67b6\u4e2d\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>varargs \u53c2\u6570\u5728\u96c6\u5408\u6846\u67b6\u4e2d\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f<\/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\">\u300avarargs \u53c2\u6570\u5728\u96c6\u5408\u6846\u67b6\u4e2d\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f\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><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729943627671cd84b87099.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5728\u96c6\u5408\u6846\u67b6\u4e2d\u5e94\u7528 <code>varargs<\/code> \u53c2\u6570<\/strong><\/p>\n<p><code>varargs<\/code>\uff08\u53ef\u53d8\u53c2\u6570\uff09\u53c2\u6570\u5141\u8bb8\u5728 Java \u65b9\u6cd5\u4e2d\u6307\u5b9a\u4efb\u610f\u6570\u91cf\u7684\u53c2\u6570\u3002\u5bf9\u4e8e\u9700\u8981\u63a5\u53d7\u53ef\u53d8\u6570\u91cf\u9879\u7684\u96c6\u5408\u6846\u67b6\u65b9\u6cd5\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p><strong>\u5e38\u89c1\u573a\u666f\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u521b\u5efa <code>List<\/code> \u6216 <code>Set<\/code> \u96c6\u5408\uff1a<\/strong><code>Arrays.asList()<\/code> \u548c <code>Collections.singleton()<\/code> \u4e4b\u7c7b\u7684\u5de5\u5382\u65b9\u6cd5\u4f7f\u7528 <code>varargs<\/code> \u6765\u521b\u5efa\u5305\u542b\u7ed9\u5b9a\u5143\u7d20\u7684\u96c6\u5408\u3002<\/li>\n<li><strong>\u8fc7\u6ee4\u6216\u4fee\u6539\u96c6\u5408\uff1a<\/strong><code>Stream.filter()<\/code> \u548c <code>Stream.map()<\/code> \u7b49\u6d41\u5f0f\u64cd\u4f5c\u4f7f\u7528 <code>varargs<\/code> \u6765\u6307\u5b9a\u8fc7\u6ee4\u6216\u6620\u5c04\u6761\u4ef6\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n<p>\u521b\u5efa\u5305\u542b\u5143\u7d20 1\u30012\u30013 \u7684 <code>List<\/code>\uff1a<\/p>\n<pre>List&lt;Integer&gt; numbers = Arrays.asList(1, 2, 3);<\/pre>\n<p>\u8fc7\u6ee4 <code>List<\/code> \u4e2d\u5927\u4e8e 2 \u7684\u5143\u7d20\uff1a<\/p>\n<pre>List&lt;Integer&gt; greaterThan2 = numbers.stream()\n    .filter(n -&gt; n &gt; 2)\n    .toList();<\/pre>\n<p><strong>\u66f4\u591a\u573a\u666f\uff1a<\/strong><\/p>\n<ul>\n<li>\u96c6\u5408\u6bd4\u8f83\uff08<code>Collections.disjoint()<\/code>\uff09<\/li>\n<li>\u54c8\u5e0c\u7801\u751f\u6210\uff08<code>Objects.hash()<\/code>\uff09<\/li>\n<li>\u683c\u5f0f\u5316\u8f93\u51fa\uff08<code>String.format()<\/code>\uff09<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba\uff1a<\/strong><\/p>\n<p><code>varargs<\/code> \u53c2\u6570\u5728\u96c6\u5408\u6846\u67b6\u4e2d\u63d0\u4f9b\u4e86\u4e00\u79cd\u4fbf\u5229\u7684\u65b9\u5f0f\u6765\u5904\u7406\u53ef\u53d8\u6570\u91cf\u7684\u5143\u7d20\u3002\u5b83\u4eec\u7b80\u5316\u4e86\u521b\u5efa\u3001\u8fc7\u6ee4\u548c\u4fee\u6539\u96c6\u5408\u7684\u4efb\u52a1\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300avarargs \u53c2\u6570\u5728\u96c6\u5408\u6846\u67b6\u4e2d\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>varargs \u53c2\u6570\u5728\u96c6\u5408\u6846\u67b6\u4e2d&#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-202803","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202803","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=202803"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202803\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}