{"id":65883,"date":"2025-05-03T08:16:59","date_gmt":"2025-05-03T00:16:59","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65883\/"},"modified":"2025-05-03T08:16:59","modified_gmt":"2025-05-03T00:16:59","slug":"java%e6%80%8e%e4%b9%88%e6%8a%8alist%e8%bd%ac%e6%88%90%e6%95%b0%e7%bb%84-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65883\/","title":{"rendered":"java\u600e\u4e48\u628alist\u8f6c\u6210\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  \u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u6cd5\u5c06 java list \u8f6c\u6362\u4e3a\u6570\u7ec4\uff1a1. \u4f7f\u7528 list.toarray() \u65b9\u6cd5\u8fd4\u56de\u5217\u8868\u4e2d\u5143\u7d20\u7684\u6570\u7ec4\uff1b2. \u4f7f\u7528 collections.toarray() \u65b9\u6cd5\u5c06\u5217\u8868\u5143\u7d20\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\uff0c\u540e\u8005\u6027\u80fd\u66f4\u4f73\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111314011854864.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u628alist\u8f6c\u6210\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u600e\u4e48\u628alist\u8f6c\u6210\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5c06 Java List \u8f6c\u6362\u4e3a\u6570\u7ec4<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\u5c06 List \u8f6c\u6362\u4e3a\u6570\u7ec4\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 List.toArray() \u65b9\u6cd5<\/strong><\/p>\n<p>toArray() \u65b9\u6cd5\u662f List \u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5b83\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u5217\u8868\u4e2d\u6240\u6709\u5143\u7d20\u7684\u6570\u7ec4\u3002\u6570\u7ec4\u7684\u7c7b\u578b\u7531\u65b9\u6cd5\u53c2\u6570\u6307\u5b9a\uff0c\u4f8b\u5982\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>List&lt;String&gt; names = new ArrayList&lt;&gt;();\nnames.add(\"Alice\");\nnames.add(\"Bob\");\nnames.add(\"Charlie\");\n\n\/\/ \u5c06\u5217\u8868\u8f6c\u6362\u4e3a String \u6570\u7ec4\nString[] namesArray = names.toArray(new String[0]);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5982\u679c\u4e0d\u6307\u5b9a\u6570\u7ec4\u7c7b\u578b\uff0ctoArray() \u65b9\u6cd5\u5c06\u8fd4\u56de\u4e00\u4e2a Object[] \u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u5217\u8868\u4e2d\u6240\u6709\u5143\u7d20\u7684\u6846\u88c5\u7248\u672c\u3002<\/p>\n<p><strong>2. \u4f7f\u7528 Collections.toArray() \u65b9\u6cd5<\/strong><\/p>\n<p>Collections.toArray() \u65b9\u6cd5\u662f\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a List \u548c\u4e00\u4e2a\u76ee\u6807\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u5c06\u5217\u8868\u4e2d\u6240\u6709\u5143\u7d20\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\u3002\u5982\u679c\u76ee\u6807\u6570\u7ec4\u7684\u957f\u5ea6\u5c0f\u4e8e\u5217\u8868\u7684\u5927\u5c0f\uff0c\u65b9\u6cd5\u4f1a\u629b\u51fa\u4e00\u4e2a\u5f02\u5e38\u3002<\/p>\n<pre>List&lt;Integer&gt; numbers = new ArrayList&lt;&gt;();\nnumbers.add(1);\nnumbers.add(2);\nnumbers.add(3);\n\n\/\/ \u5c06\u5217\u8868\u8f6c\u6362\u4e3a int \u6570\u7ec4\nint[] numbersArray = new int[numbers.size()];\nCollections.toArray(numbers, numbersArray);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6027\u80fd\u8003\u8651<\/strong><\/p>\n<p>\u4e24\u79cd\u65b9\u6cd5\u7684\u6027\u80fd\u5dee\u5f02\u5f88\u5c0f\uff0c\u5e76\u4e14\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4f7f\u7528\u4efb\u4f55\u4e00\u79cd\u65b9\u6cd5\u3002\u4f46\u662f\uff0c\u5982\u679c\u5217\u8868\u5f88\u5927\uff0c\u4f7f\u7528 Collections.toArray() \u65b9\u6cd5\u53ef\u80fd\u4f1a\u66f4\u6709\u6548\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4f1a\u521b\u5efa\u65b0\u7684\u6570\u7ec4\uff0c\u800c\u662f\u91cd\u7528\u4f20\u9012\u7684\u76ee\u6807\u6570\u7ec4\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u628alist\u8f6c\u6210\u6570\u7ec4\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u6cd5\u5c06 java list \u8f6c\u6362\u4e3a\u6570\u7ec4\uff1a1. \u4f7f\u7528 list.toarray() \u65b9\u6cd5\u8fd4\u56de\u5217\u8868\u4e2d\u5143\u7d20\u7684\u6570\u7ec4\uff1b2. \u4f7f\u7528 collections.toarray() \u65b9\u6cd5\u5c06\u5217\u8868\u5143\u7d20\u590d\u5236\u5230\u76ee\u6807\u6570\u7ec4\u4e2d\uff0c\u540e\u8005\u6027\u80fd\u66f4\u4f73\u3002 \u5982\u4f55\u5c06 Java List \u8f6c\u6362\u4e3a\u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\u5c06 List \u8f6c\u6362\u4e3a\u6570\u7ec4\uff1a 1. \u4f7f\u7528 List.toArray() \u65b9\u6cd5 toArray() \u65b9\u6cd5\u662f List \u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5b83\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u5217\u8868\u4e2d\u6240\u6709\u5143\u7d20\u7684\u6570\u7ec4\u3002\u6570\u7ec4\u7684\u7c7b\u578b\u7531\u65b9\u6cd5\u53c2\u6570\u6307\u5b9a\uff0c\u4f8b\u5982\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b List&lt;String&gt; names = new ArrayList&lt;&gt;(); names.add(&#8220;Alice&#8221;); names.add(&#8220;Bob&#8221;); names.add(&#8220;Charlie&#8221;); \/\/ \u5c06\u5217\u8868\u8f6c\u6362\u4e3a String \u6570\u7ec4 String[] namesArray = names.toArray(new String[0]); \u767b\u5f55\u540e\u590d\u5236 \u5982\u679c\u4e0d\u6307\u5b9a\u6570\u7ec4\u7c7b\u578b\uff0ctoArray() \u65b9\u6cd5\u5c06\u8fd4\u56de\u4e00\u4e2a Object[] \u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u5217\u8868\u4e2d\u6240\u6709\u5143\u7d20\u7684\u6846\u88c5\u7248\u672c\u3002 2. \u4f7f\u7528 Collections.toArray() \u65b9\u6cd5 Collections.toArray() [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-65883","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65883","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=65883"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65883\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65883"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65883"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65883"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}