{"id":64199,"date":"2025-05-03T13:41:02","date_gmt":"2025-05-03T05:41:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64199\/"},"modified":"2025-05-03T13:41:02","modified_gmt":"2025-05-03T05:41:02","slug":"java%e6%80%8e%e4%b9%88%e8%bf%94%e5%9b%9e%e4%b8%80%e4%b8%aa%e5%a4%9a%e7%bb%b4%e6%95%b0%e7%bb%84-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64199\/","title":{"rendered":"java\u600e\u4e48\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u8fd4\u56de\u591a\u7ef4\u6570\u7ec4\u7684\u65b9\u6cd5\u6709\uff1a1. \u76f4\u63a5\u8fd4\u56de\u591a\u7ef4\u6570\u7ec4\uff1b2. \u4f7f\u7528 arrays.copyof() \u8fd4\u56de\u526f\u672c\uff1b3. \u4f7f\u7528 stream \u548c toarray()\uff1b4. \u4f7f\u7528 list \u548c toarray()\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/02\/2024110218033334865.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u600e\u4e48\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u5982\u4f55\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4<\/strong><\/p>\n<p><strong>\u76f4\u63a5\u8fd4\u56de\uff1a<\/strong><\/p>\n<p>\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>public int[][] get2DArray() {\n    return new int[][]{{1, 2}, {3, 4}};\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Arrays.copyOf()\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u4e5f\u53ef\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\u7684\u526f\u672c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>public int[][] get2DArray() {\n    int[][] originalArray = {{1, 2}, {3, 4}};\n    return Arrays.copyOf(originalArray, originalArray.length);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Stream \u548c toArray()\uff1a<\/strong><\/p>\n<p>\u8fd8\u53ef\u4ee5\u4f7f\u7528 Stream \u548c toArray() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>public int[][] get2DArray() {\n    int[][] originalArray = {{1, 2}, {3, 4}};\n    return Arrays.stream(originalArray).toArray(int[][]::new);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 List \u548c toArray()\uff1a<\/strong><\/p>\n<p>\u4e5f\u53ef\u4ee5\u4f7f\u7528 List \u548c toArray() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>public int[][] get2DArray() {\n    List&lt;int[]&gt; list = new ArrayList&lt;&gt;();\n    list.add(new int[]{1, 2});\n    list.add(new int[]{3, 4});\n    return list.toArray(new int[list.size()][]);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\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 \u4e2d\u8fd4\u56de\u591a\u7ef4\u6570\u7ec4\u7684\u65b9\u6cd5\u6709\uff1a1. \u76f4\u63a5\u8fd4\u56de\u591a\u7ef4\u6570\u7ec4\uff1b2. \u4f7f\u7528 arrays.copyof() \u8fd4\u56de\u526f\u672c\uff1b3. \u4f7f\u7528 stream \u548c toarray()\uff1b4. \u4f7f\u7528 list \u548c toarray()\u3002 Java \u4e2d\u5982\u4f55\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4 \u76f4\u63a5\u8fd4\u56de\uff1a \u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\u3002\u4f8b\u5982\uff1a public int[][] get2DArray() { return new int[][]{{1, 2}, {3, 4}}; } \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Arrays.copyOf()\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4e5f\u53ef\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\u7684\u526f\u672c\u3002\u4f8b\u5982\uff1a public int[][] get2DArray() { int[][] originalArray = {{1, 2}, {3, 4}}; return Arrays.copyOf(originalArray, originalArray.length); } \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Stream \u548c [&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-64199","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64199","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=64199"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64199\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64199"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64199"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}