{"id":34768,"date":"2024-11-26T12:18:58","date_gmt":"2024-11-26T04:18:58","guid":{"rendered":"https:\/\/fwq.ai\/blog\/34768\/"},"modified":"2024-11-26T12:18:58","modified_gmt":"2024-11-26T04:18:58","slug":"java%e6%95%b0%e7%bb%84%e5%88%9b%e5%bb%ba%e5%90%8e%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/34768\/","title":{"rendered":"java\u6570\u7ec4\u521b\u5efa\u540e\u600e\u4e48\u6dfb\u52a0\u5143\u7d20"},"content":{"rendered":"<blockquote><p>\n  java\u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff0c\u4f46\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u6dfb\u52a0\u5143\u7d20\uff1a\u590d\u5236\u6570\u7ec4\uff1a\u5c06\u73b0\u6709\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\uff0c\u5e76\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u4f7f\u7528arraylist\uff1a\u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230arraylist\uff0c\u7136\u540e\u8f6c\u6362\u4e3a\u65b0\u6570\u7ec4\u3002\u4f7f\u7528system.arraycopy()\uff1a\u590d\u5236\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\uff0c\u5e76\u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u672b\u5c3e\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/03\/2024110302361850093.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u521b\u5efa\u540e\u600e\u4e48\u6dfb\u52a0\u5143\u7d20\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u521b\u5efa\u540e\u600e\u4e48\u6dfb\u52a0\u5143\u7d20\u63d2\u56fe\" \/><\/p>\n<p><strong>Java\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n<p>Java\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5728\u521b\u5efa\u540e\u4e0d\u80fd\u66f4\u6539\u5927\u5c0f\u3002\u4f46\u662f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n<p><strong>1. \u590d\u5236\u6570\u7ec4<\/strong><\/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; \/\/ \u6dfb\u52a0\u65b0\u5143\u7d20<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528ArrayList<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>ArrayList\u662f\u4e00\u79cd\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u81ea\u52a8\u589e\u957f\u548c\u7f29\u5c0f\u3002\u53ef\u4ee5\u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230ArrayList\u4e2d\uff0c\u7136\u540e\u5c06ArrayList\u8f6c\u6362\u4e3a\u65b0\u6570\u7ec4\uff1a<\/p>\n<pre>ArrayList&lt;Integer&gt; list = new ArrayList&lt;&gt;();\nfor (int element : originalArray) {\n    list.add(element);\n}\nlist.add(4); \/\/ \u6dfb\u52a0\u65b0\u5143\u7d20\nint[] newArray = new int[list.size()];\nfor (int i = 0; i &lt; list.size(); i++) {\n    newArray[i] = list.get(i);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528System.arrayCopy()<\/strong><\/p>\n<p>System.arrayCopy()\u65b9\u6cd5\u53ef\u4ee5\u5c06\u4e00\u4e2a\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002\u53ef\u4ee5\u4f7f\u7528\u8be5\u65b9\u6cd5\u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u7684\u672b\u5c3e\uff1a<\/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; \/\/ \u6dfb\u52a0\u65b0\u5143\u7d20<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528\u590d\u5236\u6570\u7ec4\u7684\u65b9\u6cd5\u9700\u8981\u663e\u5f0f\u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\u3002<\/li>\n<li>ArrayList\u867d\u7136\u66f4\u7075\u6d3b\uff0c\u4f46\u4e5f\u6bd4\u6570\u7ec4\u5f00\u9500\u66f4\u5927\u3002<\/li>\n<li>\u4f7f\u7528System.arrayCopy()\u65b9\u6cd5\u53ea\u9002\u7528\u4e8e\u6dfb\u52a0\u5355\u4e2a\u5143\u7d20\uff0c\u6dfb\u52a0\u591a\u4e2a\u5143\u7d20\u65f6\u6548\u7387\u8f83\u4f4e\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u521b\u5efa\u540e\u600e\u4e48\u6dfb\u52a0\u5143\u7d20\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>java\u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff0c\u4f46\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u6dfb\u52a0\u5143\u7d20\uff1a\u590d\u5236\u6570\u7ec4\uff1a\u5c06\u73b0\u6709\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\uff0c\u5e76\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u4f7f\u7528arraylist\uff1a\u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230arraylist\uff0c\u7136\u540e\u8f6c\u6362\u4e3a\u65b0\u6570\u7ec4\u3002\u4f7f\u7528system.arraycopy()\uff1a\u590d\u5236\u6570\u7ec4\u7684\u4e00\u90e8\u5206\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\uff0c\u5e76\u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u672b\u5c3e\u3002 Java\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20 Java\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5728\u521b\u5efa\u540e\u4e0d\u80fd\u66f4\u6539\u5927\u5c0f\u3002\u4f46\u662f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5411\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\uff1a 1. \u590d\u5236\u6570\u7ec4 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; \/\/ \u6dfb\u52a0\u65b0\u5143\u7d20 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528ArrayList \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b ArrayList\u662f\u4e00\u79cd\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u81ea\u52a8\u589e\u957f\u548c\u7f29\u5c0f\u3002\u53ef\u4ee5\u5c06\u6570\u7ec4\u5143\u7d20\u6dfb\u52a0\u5230ArrayList\u4e2d\uff0c\u7136\u540e\u5c06ArrayList\u8f6c\u6362\u4e3a\u65b0\u6570\u7ec4\uff1a ArrayList&lt;Integer&gt; list = new ArrayList&lt;&gt;(); for (int element : originalArray) { list.add(element); } list.add(4); \/\/ \u6dfb\u52a0\u65b0\u5143\u7d20 int[] newArray = [&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-34768","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34768","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=34768"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34768\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=34768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=34768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=34768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}