{"id":66272,"date":"2025-05-03T15:47:37","date_gmt":"2025-05-03T07:47:37","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66272\/"},"modified":"2025-05-03T15:47:37","modified_gmt":"2025-05-03T07:47:37","slug":"java%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%a2%9e%e5%8a%a0%e4%b8%80%e4%b8%aa%e5%85%83%e7%b4%a0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66272\/","title":{"rendered":"java\u6570\u7ec4\u600e\u4e48\u589e\u52a0\u4e00\u4e2a\u5143\u7d20"},"content":{"rendered":"<blockquote><p>\n  \u5411 java \u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\u6709\u4e09\u79cd\uff1a\u4f7f\u7528 arraylist\uff08\u63a8\u8350\uff09\uff1aarraylist \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5141\u8bb8\u6dfb\u52a0\u5143\u7d20\u3002\u521b\u5efa\u66f4\u5927\u6570\u7ec4\u5e76\u590d\u5236\u5143\u7d20\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5927\u4e8e\u539f\u59cb\u6570\u7ec4\uff0c\u7136\u540e\u590d\u5236\u5143\u7d20\u5e76\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u4f7f\u7528 arrays.copyof()\uff1a\u5c06\u539f\u59cb\u6570\u7ec4\u590d\u5236\u5230\u4e00\u4e2a\u66f4\u5927\u6570\u7ec4\uff0c\u7136\u540e\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/15\/2024111505460310237.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u600e\u4e48\u589e\u52a0\u4e00\u4e2a\u5143\u7d20\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u600e\u4e48\u589e\u52a0\u4e00\u4e2a\u5143\u7d20\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5411 Java \u6570\u7ec4\u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n<p>Java \u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4e00\u65e6\u521b\u5efa\uff0c\u5c31\u4e0d\u80fd\u66f4\u6539\u5176\u5927\u5c0f\u3002\u4e0d\u8fc7\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u5730\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u3002<\/p>\n<p><strong>1. \u4f7f\u7528 ArrayList\uff08\u63a8\u8350\uff09<\/strong><\/p>\n<p>ArrayList \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u8c03\u6574\u5176\u5927\u5c0f\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a add() \u65b9\u6cd5\uff0c\u53ef\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u672b\u5c3e\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>ArrayList&lt;Integer&gt; numbers = new ArrayList&lt;&gt;();\nnumbers.add(1);\nnumbers.add(2);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4\u5e76\u590d\u5236\u5143\u7d20<\/strong><\/p>\n<p>\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u5927\u5c0f\u6bd4\u539f\u59cb\u6570\u7ec4\u5927\u4e00\u4e2a\u5143\u7d20\uff0c\u7136\u540e\u5c06\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002\u6700\u540e\uff0c\u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u3002<\/p>\n<pre>int[] originalArray = {1, 2, 3};\nint[] newArray = new int[originalArray.length + 1];\nSystem.arraycopy(originalArray, 0, newArray, 0, originalArray.length);\nnewArray[newArray.length - 1] = 4;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528 Arrays.copyOf()<\/strong><\/p>\n<p>Arrays.copyOf() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u662f\u539f\u59cb\u6570\u7ec4\u7684\u526f\u672c\uff0c\u5e76\u4e14\u6307\u5b9a\u5927\u5c0f\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u6b64\u65b9\u6cd5\u521b\u5efa\u66f4\u5927\u7684\u6570\u7ec4\u5e76\u590d\u5236\u5143\u7d20\uff0c\u7c7b\u4f3c\u4e8e\u4e0a\u9762\u7684\u65b9\u6cd5\u3002<\/p>\n<pre>int[] originalArray = {1, 2, 3};\nint[] newArray = Arrays.copyOf(originalArray, originalArray.length + 1);\nnewArray[newArray.length - 1] = 4;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u589e\u52a0\u4e00\u4e2a\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>\u5411 java \u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\u6709\u4e09\u79cd\uff1a\u4f7f\u7528 arraylist\uff08\u63a8\u8350\uff09\uff1aarraylist \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5141\u8bb8\u6dfb\u52a0\u5143\u7d20\u3002\u521b\u5efa\u66f4\u5927\u6570\u7ec4\u5e76\u590d\u5236\u5143\u7d20\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5927\u4e8e\u539f\u59cb\u6570\u7ec4\uff0c\u7136\u540e\u590d\u5236\u5143\u7d20\u5e76\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u4f7f\u7528 arrays.copyof()\uff1a\u5c06\u539f\u59cb\u6570\u7ec4\u590d\u5236\u5230\u4e00\u4e2a\u66f4\u5927\u6570\u7ec4\uff0c\u7136\u540e\u6dfb\u52a0\u65b0\u5143\u7d20\u3002 \u5982\u4f55\u5411 Java \u6570\u7ec4\u6dfb\u52a0\u5143\u7d20 Java \u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4e00\u65e6\u521b\u5efa\uff0c\u5c31\u4e0d\u80fd\u66f4\u6539\u5176\u5927\u5c0f\u3002\u4e0d\u8fc7\uff0c\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u5730\u5411 Java \u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u3002 1. \u4f7f\u7528 ArrayList\uff08\u63a8\u8350\uff09 ArrayList \u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u8c03\u6574\u5176\u5927\u5c0f\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a add() \u65b9\u6cd5\uff0c\u53ef\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u672b\u5c3e\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b ArrayList&lt;Integer&gt; numbers = new ArrayList&lt;&gt;(); numbers.add(1); numbers.add(2); \u767b\u5f55\u540e\u590d\u5236 2. \u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4\u5e76\u590d\u5236\u5143\u7d20 \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u5927\u5c0f\u6bd4\u539f\u59cb\u6570\u7ec4\u5927\u4e00\u4e2a\u5143\u7d20\uff0c\u7136\u540e\u5c06\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002\u6700\u540e\uff0c\u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u65b0\u6570\u7ec4\u3002 int[] originalArray = {1, 2, 3}; int[] newArray = new int[originalArray.length + 1]; System.arraycopy(originalArray, 0, newArray, 0, originalArray.length); newArray[newArray.length &#8211; 1] = 4; [&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-66272","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66272","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=66272"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66272\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66272"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66272"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66272"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}