{"id":66948,"date":"2025-05-03T14:27:32","date_gmt":"2025-05-03T06:27:32","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66948\/"},"modified":"2025-05-03T14:27:32","modified_gmt":"2025-05-03T06:27:32","slug":"java%e4%ba%8c%e7%bb%b4%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%a2%9e%e5%8a%a0%e4%b8%80%e8%a1%8c-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66948\/","title":{"rendered":"Java\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u589e\u52a0\u4e00\u884c"},"content":{"rendered":"<blockquote><p>\n  java \u4e8c\u7ef4\u6570\u7ec4\u4e2d\u589e\u52a0\u4e00\u884c\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528 list \u521b\u5efa\u5305\u542b\u65b0\u884c\u5143\u7d20\u7684 list\uff0c\u5e76\u4f7f\u7528 arrays.copyof() \u6dfb\u52a0\u5230\u73b0\u6709\u6570\u7ec4\u672b\u5c3e\u3002\u4f7f\u7528\u4e8c\u7ef4\u6570\u7ec4\u7684\u590d\u5236\uff0c\u901a\u8fc7 system.arraycopy() \u590d\u5236\u73b0\u6709\u6570\u7ec4\uff0c\u5206\u914d\u4e00\u4e2a\u65b0\u6570\u7ec4\u5e76\u6dfb\u52a0\u65b0\u884c\u3002\u4f7f\u7528 apache commons \u6570\u7ec4\u5de5\u5177\u7c7b\uff0c\u5229\u7528 arrayutils.add() \u65b9\u6cd5\u5c06\u6570\u7ec4\u6dfb\u52a0\u5230\u73b0\u6709\u6570\u7ec4\u672b\u5c3e\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111720152125293.jpg\" class=\"aligncenter\" title=\"Java\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u589e\u52a0\u4e00\u884c\u63d2\u56fe\" alt=\"Java\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u589e\u52a0\u4e00\u884c\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u589e\u52a0 Java \u4e8c\u7ef4\u6570\u7ec4\u7684\u4e00\u884c<\/strong><\/p>\n<p>Java \u4e8c\u7ef4\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5176\u4e2d\u5143\u7d20\u88ab\u6210\u884c\u548c\u5217\u3002\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u589e\u52a0 Java \u4e8c\u7ef4\u6570\u7ec4\u7684\u4e00\u884c\uff1a<\/p>\n<p><strong>\u65b9\u6cd5 1\uff1a\u4f7f\u7528 List<\/strong><\/p>\n<ul>\n<li>\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u65b0\u884c\u5143\u7d20\u7684 List\u3002<\/li>\n<li>\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u5728\u73b0\u6709\u6570\u7ec4\u7684\u672b\u5c3e\u6dfb\u52a0 List\u3002<\/li>\n<\/ul>\n<p>\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[][] array = {\n    {1, 2, 3},\n    {4, 5, 6}\n};\n\nList&lt;Integer&gt; newRow = new ArrayList&lt;&gt;(Arrays.asList(7, 8, 9));\narray = Arrays.copyOf(array, array.length + 1);\narray[array.length - 1] = newRow.stream().mapToInt(i -&gt; i).toArray();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u65b9\u6cd5 2\uff1a\u4f7f\u7528\u4e8c\u7ef4\u6570\u7ec4\u7684\u590d\u5236<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u590d\u5236\u73b0\u6709\u6570\u7ec4\u3002<\/li>\n<li>\u5206\u914d\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5927\u5c0f\u4e3a\u73b0\u6709\u6570\u7ec4\u5927\u5c0f\u52a0 1\u3002<\/li>\n<li>\u5c06\u73b0\u6709\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\u3002<\/li>\n<li>\u5728\u65b0\u6570\u7ec4\u672b\u5c3e\u6dfb\u52a0\u65b0\u884c\u3002<\/li>\n<\/ul>\n<p>\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[][] array = {\n    {1, 2, 3},\n    {4, 5, 6}\n};\n\nint[][] newArray = new int[array.length + 1][];\nSystem.arraycopy(array, 0, newArray, 0, array.length);\nnewArray[newArray.length - 1] = new int[]{7, 8, 9};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u65b9\u6cd5 3\uff1a\u4f7f\u7528 Apache Commons \u6570\u7ec4\u5de5\u5177\u7c7b<\/strong><\/p>\n<ul>\n<li>Apache Commons \u63d0\u4f9b\u4e86 ArrayUtils.add() \u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u4e00\u4e2a\u6570\u7ec4\u6dfb\u52a0\u5230\u73b0\u6709\u6570\u7ec4\u7684\u672b\u5c3e\u3002<\/li>\n<\/ul>\n<p>\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[][] array = {\n    {1, 2, 3},\n    {4, 5, 6}\n};\n\nint[] newRow = {7, 8, 9};\narray = ArrayUtils.add(array, newRow);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fJava\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u589e\u52a0\u4e00\u884c\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>java \u4e8c\u7ef4\u6570\u7ec4\u4e2d\u589e\u52a0\u4e00\u884c\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528 list \u521b\u5efa\u5305\u542b\u65b0\u884c\u5143\u7d20\u7684 list\uff0c\u5e76\u4f7f\u7528 arrays.copyof() \u6dfb\u52a0\u5230\u73b0\u6709\u6570\u7ec4\u672b\u5c3e\u3002\u4f7f\u7528\u4e8c\u7ef4\u6570\u7ec4\u7684\u590d\u5236\uff0c\u901a\u8fc7 system.arraycopy() \u590d\u5236\u73b0\u6709\u6570\u7ec4\uff0c\u5206\u914d\u4e00\u4e2a\u65b0\u6570\u7ec4\u5e76\u6dfb\u52a0\u65b0\u884c\u3002\u4f7f\u7528 apache commons \u6570\u7ec4\u5de5\u5177\u7c7b\uff0c\u5229\u7528 arrayutils.add() \u65b9\u6cd5\u5c06\u6570\u7ec4\u6dfb\u52a0\u5230\u73b0\u6709\u6570\u7ec4\u672b\u5c3e\u3002 \u5982\u4f55\u589e\u52a0 Java \u4e8c\u7ef4\u6570\u7ec4\u7684\u4e00\u884c Java \u4e8c\u7ef4\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5176\u4e2d\u5143\u7d20\u88ab\u6210\u884c\u548c\u5217\u3002\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u589e\u52a0 Java \u4e8c\u7ef4\u6570\u7ec4\u7684\u4e00\u884c\uff1a \u65b9\u6cd5 1\uff1a\u4f7f\u7528 List \u521b\u5efa\u4e00\u4e2a\u5305\u542b\u65b0\u884c\u5143\u7d20\u7684 List\u3002 \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u5728\u73b0\u6709\u6570\u7ec4\u7684\u672b\u5c3e\u6dfb\u52a0 List\u3002 \u793a\u4f8b\u4ee3\u7801\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[][] array = { {1, 2, 3}, {4, 5, 6} }; List&lt;Integer&gt; newRow = new ArrayList&lt;&gt;(Arrays.asList(7, 8, 9)); array = Arrays.copyOf(array, array.length + [&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-66948","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66948","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=66948"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66948\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66948"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66948"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66948"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}