{"id":35600,"date":"2024-11-26T14:24:43","date_gmt":"2024-11-26T06:24:43","guid":{"rendered":"https:\/\/fwq.ai\/blog\/35600\/"},"modified":"2024-11-26T14:24:43","modified_gmt":"2024-11-26T06:24:43","slug":"java%e6%80%8e%e4%b9%88%e5%b0%86%e4%b8%80%e4%b8%aa%e5%80%bc%e5%8a%a0%e5%88%b0%e6%95%b0%e7%bb%84%e5%90%8e%e9%9d%a2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/35600\/","title":{"rendered":"java\u600e\u4e48\u5c06\u4e00\u4e2a\u503c\u52a0\u5230\u6570\u7ec4\u540e\u9762"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5c06\u503c\u6dfb\u52a0\u5230\u6570\u7ec4\u672b\u5c3e\uff1a1. \u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\uff1b2. \u4f7f\u7528 arraylist\uff1b3. \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/04\/2024110406485096538.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5c06\u4e00\u4e2a\u503c\u52a0\u5230\u6570\u7ec4\u540e\u9762\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5c06\u4e00\u4e2a\u503c\u52a0\u5230\u6570\u7ec4\u540e\u9762\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u5c06\u503c\u6dfb\u52a0\u5230\u6570\u7ec4\u672b\u5c3e<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684\u5143\u7d20\u96c6\u5408\uff0c\u4e0d\u80fd\u76f4\u63a5\u52a8\u6001\u5730\u4fee\u6539\u5176\u5927\u5c0f\u3002\u4f46\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5c06\u503c\u6dfb\u52a0\u5230\u6570\u7ec4\u672b\u5c3e\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5<\/strong><\/p>\n<pre>int[] originalArray = {1, 2, 3, 4};\nint newValue = 5;\n\nint[] newArray = Arrays.copyOf(originalArray, originalArray.length + 1);\nnewArray[originalArray.length] = newValue;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 ArrayList<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>List&lt;Integer&gt; arrayList = new ArrayList&lt;&gt;(Arrays.asList(1, 2, 3, 4));\narrayList.add(5);\n\n\/\/ \u5c06 ArrayList \u8f6c\u6362\u4e3a\u6570\u7ec4\nint[] newArray = arrayList.stream().mapToInt(i -&gt; i).toArray();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4<\/strong><\/p>\n<p>\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u5927\u5c0f\u6bd4\u539f\u6570\u7ec4\u5927 1\uff0c\u7136\u540e\u5c06\u539f\u6570\u7ec4\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u5e76\u6dfb\u52a0\u65b0\u503c\u3002<\/p>\n<pre>int[] originalArray = {1, 2, 3, 4};\nint newValue = 5;\n\nint[] newArray = new int[originalArray.length + 1];\nSystem.arraycopy(originalArray, 0, newArray, 0, originalArray.length);\nnewArray[originalArray.length] = newValue;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5c06\u4e00\u4e2a\u503c\u52a0\u5230\u6570\u7ec4\u540e\u9762\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>\u5728 java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5c06\u503c\u6dfb\u52a0\u5230\u6570\u7ec4\u672b\u5c3e\uff1a1. \u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\uff1b2. \u4f7f\u7528 arraylist\uff1b3. \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u3002 \u5982\u4f55\u5728 Java \u4e2d\u5c06\u503c\u6dfb\u52a0\u5230\u6570\u7ec4\u672b\u5c3e \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u7684\u5143\u7d20\u96c6\u5408\uff0c\u4e0d\u80fd\u76f4\u63a5\u52a8\u6001\u5730\u4fee\u6539\u5176\u5927\u5c0f\u3002\u4f46\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5c06\u503c\u6dfb\u52a0\u5230\u6570\u7ec4\u672b\u5c3e\uff1a 1. \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5 int[] originalArray = {1, 2, 3, 4}; int newValue = 5; int[] newArray = Arrays.copyOf(originalArray, originalArray.length + 1); newArray[originalArray.length] = newValue; \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 ArrayList \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b List&lt;Integer&gt; arrayList = new ArrayList&lt;&gt;(Arrays.asList(1, 2, 3, 4)); arrayList.add(5); \/\/ [&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-35600","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/35600","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=35600"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/35600\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=35600"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=35600"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=35600"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}