{"id":64274,"date":"2025-05-03T10:14:52","date_gmt":"2025-05-03T02:14:52","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64274\/"},"modified":"2025-05-03T10:14:52","modified_gmt":"2025-05-03T02:14:52","slug":"java%e6%80%8e%e4%b9%88%e5%90%91%e6%95%b0%e7%bb%84%e4%b8%ad%e6%b7%bb%e5%8a%a0%e5%85%83%e7%b4%a0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64274\/","title":{"rendered":"java\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u6709\u4e09\u79cd\u65b9\u6cd5\uff1a1. \u6269\u5bb9\u6570\u7ec4\uff1b2. \u4f7f\u7528 arraylist\uff1b3. \u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff0c\u4f8b\u5982 apache commons lang\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/03\/2024110302394838493.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n<p><strong>1. \u6570\u7ec4\u6269\u5bb9<\/strong><\/p>\n<p>\u5c06\u6570\u7ec4\u6269\u5bb9\u4e3a\u73b0\u6709\u5927\u5c0f\u52a0\u4e0a\u65b0\u5143\u7d20\u4e2a\u6570\uff0c\u7136\u540e\u5c06\u65b0\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] arr = {1, 2, 3};\nint[] newArr = new int[arr.length + 2];\nSystem.arraycopy(arr, 0, newArr, 0, arr.length);\nnewArr[arr.length] = 4;\nnewArr[arr.length + 1] = 5;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 ArrayList<\/strong><\/p>\n<p>\u5c06\u6570\u7ec4\u5143\u7d20\u8f6c\u6362\u4e3a ArrayList\uff0c\u7136\u540e\u4f7f\u7528 ArrayList \u7684 add() \u65b9\u6cd5\u6dfb\u52a0\u65b0\u5143\u7d20\u3002<\/p>\n<pre>int[] arr = {1, 2, 3};\nArrayList&lt;Integer&gt; list = new ArrayList&lt;&gt;();\nfor (int i : arr) {\n    list.add(i);\n}\nlist.add(4);\nlist.add(5);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 Apache Commons Lang \u7684 ArrayUtils \u7c7b\uff0c\u8be5\u7c7b\u63d0\u4f9b\u4e86 add() \u65b9\u6cd5\u6765\u6dfb\u52a0\u65b0\u5143\u7d20\u3002<\/p>\n<pre>int[] arr = {1, 2, 3};\nint[] newArr = ArrayUtils.add(arr, 4);\nnewArr = ArrayUtils.add(newArr, 5);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\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>\u5728 java \u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u6709\u4e09\u79cd\u65b9\u6cd5\uff1a1. \u6269\u5bb9\u6570\u7ec4\uff1b2. \u4f7f\u7528 arraylist\uff1b3. \u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff0c\u4f8b\u5982 apache commons lang\u3002 \u5982\u4f55\u5728 Java \u4e2d\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20 \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a 1. \u6570\u7ec4\u6269\u5bb9 \u5c06\u6570\u7ec4\u6269\u5bb9\u4e3a\u73b0\u6709\u5927\u5c0f\u52a0\u4e0a\u65b0\u5143\u7d20\u4e2a\u6570\uff0c\u7136\u540e\u5c06\u65b0\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] arr = {1, 2, 3}; int[] newArr = new int[arr.length + 2]; System.arraycopy(arr, 0, newArr, 0, arr.length); newArr[arr.length] = 4; newArr[arr.length + 1] = 5; \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 ArrayList \u5c06\u6570\u7ec4\u5143\u7d20\u8f6c\u6362\u4e3a ArrayList\uff0c\u7136\u540e\u4f7f\u7528 ArrayList \u7684 add() [&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-64274","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64274","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=64274"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64274\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}