{"id":292906,"date":"2024-05-20T14:30:19","date_gmt":"2024-05-20T06:30:19","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/292906.html"},"modified":"2024-05-20T14:30:54","modified_gmt":"2024-05-20T06:30:54","slug":"java-%e6%95%b0%e7%bb%84%e5%a6%82%e4%bd%95%e8%bd%ac-list","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/292906.html","title":{"rendered":"JAVA \u6570\u7ec4\u5982\u4f55\u8f6c list"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27135654\/21018ef7-e397-4a37-b127-8ffd7fc4352a.webp\" alt=\"JAVA \u6570\u7ec4\u5982\u4f55\u8f6c list\" \/><\/p>\n<p><p>Java\u6570\u7ec4\u8f6cList\u7684\u65b9\u6cd5\u4e3b\u8981\u6709<strong>\u4f7f\u7528Arrays.asList() \u65b9\u6cd5\u3001Collections.addAll() \u65b9\u6cd5\u3001\u901a\u8fc7Stream API \u8f6c\u6362<\/strong>\u3002\u5728\u8fd9\u4e9b\u65b9\u6cd5\u4e2d\uff0c<strong>\u4f7f\u7528<code>Arrays.asList()<\/code> \u65b9\u6cd5<\/strong>\u662f\u6700\u76f4\u89c2\u548c\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u4f46\u5b83\u6709\u4e00\u4e9b\u9650\u5236\u548c\u6ce8\u610f\u4e8b\u9879\u3002<\/p>\n<\/p>\n<p><p><code>Arrays.asList()<\/code>\u65b9\u6cd5\u8fd4\u56de\u7684List\u662fArrays\u7684\u5185\u90e8\u7c7bArrayList\u7684\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u800c\u4e0d\u662fjava.util.ArrayList\u7c7b\u7684\u5b9e\u4f8b\u3002\u8fd9\u610f\u5473\u7740\uff0c\u8fd4\u56de\u7684List\u662f\u56fa\u5b9a\u5927\u5c0f\u7684\uff0c\u4e0d\u80fd\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\uff0c\u5c1d\u8bd5\u8fd9\u6837\u505a\u4f1a\u629b\u51fa<code>UnsupportedOperationException<\/code>\u5f02\u5e38\u3002\u53e6\u5916\uff0c\u5982\u679c\u5bf9\u539f\u59cb\u6570\u7ec4\u7684\u5185\u5bb9\u8fdb\u884c\u4fee\u6539\uff0c\u8fd9\u4e9b\u66f4\u6539\u4f1a\u53cd\u6620\u5728\u901a\u8fc7<code>Arrays.asList()<\/code>\u65b9\u6cd5\u8fd4\u56de\u7684List\u4e2d\uff0c\u56e0\u4e3a\u8fd9\u4e2aList\u5b9e\u9645\u4e0a\u662f\u6570\u7ec4\u7684\u4e00\u4e2a\u89c6\u56fe\u3002\u5c3d\u7ba1\u6709\u8fd9\u4e9b\u9650\u5236\uff0c\u4f46\u5bf9\u4e8e\u9700\u8981\u5c06\u6570\u7ec4\u5feb\u901f\u8f6c\u6362\u6210List\u8fdb\u884c\u904d\u5386\u6216\u5e94\u7528\u96c6\u5408\u64cd\u4f5c\u7684\u573a\u666f\u6765\u8bf4\uff0c<code>Arrays.asList()<\/code>\u662f\u4e00\u4e2a\u975e\u5e38\u65b9\u4fbf\u548c\u6709\u6548\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u4f7f\u7528<code>Arrays.asList()<\/code>\u65b9\u6cd5<\/h3>\n<\/p>\n<p><p><code>Arrays.asList()<\/code>\u65b9\u6cd5\u9002\u7528\u4e8e\u5c06\u4e00\u4e2a\u6570\u7ec4\u8f6c\u6362\u4e3a\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684List\u3002\u8fd9\u4e2a\u65b9\u6cd5\u7b80\u5355\u4fbf\u6377\uff0c\u4f46\u662f\u5f97\u5230\u7684List\u4e0d\u80fd\u8fdb\u884c\u7ed3\u6784\u6027\u4fee\u6539\uff0c\u5982\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">String[] array = {&quot;Java&quot;, &quot;Python&quot;, &quot;C++&quot;};<\/p>\n<p>List&lt;String&gt; list = Arrays.asList(array);<\/p>\n<p>\/\/ \u6ce8\u610f\uff1a\u8fd4\u56de\u7684list\u662f\u56fa\u5b9a\u5927\u5c0f\u7684<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u6ce8\u610f\uff0c\u5982\u679c\u5c1d\u8bd5\u5bf9\u8fd4\u56de\u7684List\u8fdb\u884c\u6dfb\u52a0(add)\u6216\u5220\u9664(remove)\u7b49\u64cd\u4f5c\u4f1a\u5f15\u53d1<code>UnsupportedOperationException<\/code>\u3002\u8fd9\u662f\u56e0\u4e3a<code>Arrays.asList()<\/code>\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684List\u89c6\u56fe\uff0c\u76f4\u63a5\u57fa\u4e8e\u539f\u59cb\u6570\u7ec4\uff0c\u4e0d\u652f\u6301\u5c3a\u5bf8\u4fee\u6539\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u4f7f\u7528<code>Collections.addAll()<\/code>\u65b9\u6cd5<\/h3>\n<\/p>\n<p><p>\u5982\u679c\u9700\u8981\u4e00\u4e2a\u53ef\u53d8\u7684List\uff0c\u53ef\u4ee5\u4f7f\u7528<code>Collections.addAll()<\/code>\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u5141\u8bb8\u4f60\u5728\u8f6c\u6362\u8fc7\u7a0b\u4e2d\u5411List\u4e2d\u6dfb\u52a0\u989d\u5916\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">String[] array = {&quot;Java&quot;, &quot;Python&quot;, &quot;C++&quot;};<\/p>\n<p>List&lt;String&gt; list = new ArrayList&lt;&gt;();<\/p>\n<p>Collections.addAll(list, array);<\/p>\n<p>\/\/ \u7ed3\u679clist\u662f\u53ef\u4fee\u6539\u7684<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u7684\u597d\u5904\u662f\u5f97\u5230\u4e00\u4e2a\u771f\u6b63\u7684<code>java.util.ArrayList<\/code>\u5b9e\u4f8b\uff0c\u53ef\u4ee5\u81ea\u7531\u5730\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002\u8fd9\u4f7f\u5f97\u5b83\u66f4\u52a0\u7075\u6d3b\uff0c\u9002\u7528\u4e8e\u9700\u8981\u8fdb\u884c\u591a\u6b21\u4fee\u6539\u64cd\u4f5c\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u901a\u8fc7Stream API\u8f6c\u6362<\/h3>\n<\/p>\n<p><p>Java 8 \u5f15\u5165\u7684Stream API\u63d0\u4f9b\u4e86\u53e6\u4e00\u79cd\u5c06\u6570\u7ec4\u8f6c\u5316\u4e3aList\u7684\u65b9\u6cd5\u3002\u8fd9\u4e2a\u65b9\u6cd5\u4e0d\u4ec5\u53ef\u4ee5\u8f6c\u6362\u6570\u7ec4\uff0c\u8fd8\u53ef\u4ee5\u7528\u6765\u6267\u884c\u66f4\u590d\u6742\u7684\u8f6c\u6362\uff0c\u5982\u8fc7\u6ee4\u3001\u6392\u5e8f\u548c\u6620\u5c04\u7b49\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">String[] array = {&quot;Java&quot;, &quot;Python&quot;, &quot;C++&quot;};<\/p>\n<p>List&lt;String&gt; list = Arrays.stream(array).collect(Collectors.toList());<\/p>\n<p>\/\/ \u7ed3\u679clist\u662f\u53ef\u4fee\u6539\u7684<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u4f7f\u7528Stream API\u7684\u597d\u5904\u662f\u5b83\u63d0\u4f9b\u4e86\u66f4\u591a\u63a7\u5236\u548c\u7075\u6d3b\u6027\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u5728\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3aList\u4e4b\u524d\u5bf9\u6570\u7ec4\u5143\u7d20\u8fdb\u884c\u8fc7\u6ee4\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-java\">String[] array = {&quot;Java&quot;, &quot;Python&quot;, &quot;C#&quot;, &quot;C++&quot;};<\/p>\n<p>List&lt;String&gt; list = Arrays.stream(array)<\/p>\n<p>    .filter(s -&gt; s.startsWith(&quot;C&quot;))<\/p>\n<p>    .collect(Collectors.toList());<\/p>\n<p>\/\/ \u7ed3\u679c\u53ea\u5305\u542b&quot;C#&quot;\u548c&quot;C++&quot;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u5c0f\u7ed3<\/h3>\n<\/p>\n<p><p>\u5728Java\u4e2d\uff0c\u5c06\u6570\u7ec4\u8f6c\u6362\u5230List\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u548c\u4e0a\u4e0b\u6587\u9009\u62e9\u6700\u5408\u9002\u7684\u65b9\u6cd5\u3002<code>Arrays.asList()<\/code>\u63d0\u4f9b\u4e86\u4e00\u79cd\u5feb\u901f\u4e14\u7b80\u5355\u7684\u8f6c\u6362\u65b9\u5f0f\uff0c\u4f46\u5f97\u5230\u7684List\u5728\u5927\u5c0f\u4e0a\u662f\u4e0d\u53ef\u53d8\u7684\u3002\u901a\u8fc7<code>Collections.addAll()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u83b7\u5f97\u4e00\u4e2a\u6807\u51c6\u4e14\u53ef\u53d8\u7684ArrayList\u3002\u800cStream API\u5219\u4e3a\u8f6c\u6362\u8fc7\u7a0b\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7684\u7075\u6d3b\u6027\u548c\u63a7\u5236\u80fd\u529b\uff0c\u7279\u522b\u9002\u5408\u9700\u8981\u5bf9\u6570\u7ec4\u6570\u636e\u8fdb\u884c\u8fc7\u6ee4\u6216\u5176\u4ed6\u5904\u7406\u7684\u60c5\u51b5\u3002\u5728\u9009\u62e9\u9002\u5408\u7684\u65b9\u6cd5\u65f6\uff0c\u5e94\u8be5\u8003\u8651\u5230\u8f6c\u6362\u540eList\u7684\u53ef\u53d8\u6027\u9700\u6c42\u4ee5\u53ca\u662f\u5426\u9700\u8981\u8fdb\u884c\u989d\u5916\u7684\u6570\u636e\u5904\u7406\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. \u5982\u4f55\u5c06 Java \u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\uff1f<\/strong><br \/>\n\u5c06 Java \u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\u53ef\u4ee5\u4f7f\u7528 Arrays \u7c7b\u7684 asList() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u5c06\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u4e0e\u6570\u7ec4\u76f8\u5bf9\u5e94\u7684\u56fa\u5b9a\u5927\u5c0f\u7684\u5217\u8868\u3002\u8fd9\u6837\uff0c\u60a8\u5c31\u53ef\u4ee5\u50cf\u64cd\u4f5c\u5217\u8868\u4e00\u6837\u64cd\u4f5c\u8fd9\u4e2a\u5217\u8868\u3002<\/p>\n<p><strong>2. \u5982\u4f55\u5728\u8f6c\u6362\u8fc7\u7a0b\u4e2d\u5904\u7406\u7279\u5b9a\u7c7b\u578b\u7684\u6570\u7ec4\uff1f<\/strong><br \/>\n\u5982\u679c\u60a8\u6709\u4e00\u4e2a\u7279\u5b9a\u7c7b\u578b\u7684\u6570\u7ec4\uff0c\u4f8b\u5982\u6574\u6570\u6570\u7ec4\u6216\u5b57\u7b26\u4e32\u6570\u7ec4\uff0c\u5e76\u4e14\u5e0c\u671b\u5c06\u5176\u8f6c\u6362\u4e3a\u76f8\u5e94\u7c7b\u578b\u7684\u5217\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528\u5e26\u6709\u6cdb\u578b\u6807\u8bc6\u7b26\u7684 asList() \u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 Arrays.asList(1, 2, 3) \u5c06\u6574\u6570\u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\u3002<\/p>\n<p><strong>3. \u8f6c\u6362\u540e\uff0c\u80fd\u5426\u4fee\u6539\u5217\u8868\u4e2d\u7684\u5143\u7d20\uff1f<\/strong><br \/>\n\u5f53\u60a8\u4f7f\u7528 asList() \u65b9\u6cd5\u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\u65f6\uff0c\u8bf7\u6ce8\u610f\u8fd4\u56de\u7684\u5217\u8868\u662f\u56fa\u5b9a\u5927\u5c0f\u7684\u3002\u8fd9\u610f\u5473\u7740\u60a8\u53ef\u4ee5\u8bbf\u95ee\u548c\u4fee\u6539\u5217\u8868\u4e2d\u7684\u5143\u7d20\uff0c\u4f46\u4e0d\u80fd\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002\u5982\u679c\u5c1d\u8bd5\u8c03\u7528 add() \u6216 remove() \u7b49\u65b9\u6cd5\uff0c\u5c06\u4f1a\u5f15\u53d1 UnsupportedOperationException \u5f02\u5e38\u3002\u5982\u679c\u60a8\u9700\u8981\u4e00\u4e2a\u53ef\u53d8\u5927\u5c0f\u7684\u5217\u8868\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 ArrayList \u5e76\u5c06\u8f6c\u6362\u540e\u7684\u5217\u8868\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u6784\u9020\u51fd\u6570\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Java\u6570\u7ec4\u8f6cList\u7684\u65b9\u6cd5\u4e3b\u8981\u6709\u4f7f\u7528Arrays.asList() \u65b9\u6cd5\u3001Collections.addAl [&hellip;]","protected":false},"author":3,"featured_media":292947,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/292906"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=292906"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/292906\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/292947"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=292906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=292906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=292906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}