{"id":38849,"date":"2024-11-26T16:38:07","date_gmt":"2024-11-26T08:38:07","guid":{"rendered":"https:\/\/fwq.ai\/blog\/38849\/"},"modified":"2024-11-26T16:38:07","modified_gmt":"2024-11-26T08:38:07","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e6%89%8b%e5%8a%a8%e6%8e%a7%e5%88%b6%e6%95%b0%e7%bb%84%e7%bb%b4%e6%95%b0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/38849\/","title":{"rendered":"Java\u4e2d\u600e\u4e48\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5b9e\u73b0\uff1a\u4f7f\u7528\u591a\u7ef4\u6570\u7ec4\u521b\u5efa\u5177\u6709\u591a\u4e2a\u7ef4\u5ea6\u7684\u6570\u7ec4\u3002\u5229\u7528\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u6765\u6a21\u62df\u7ef4\u6570\uff0c\u5982\uff1alength \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u957f\u5ea6\u3002clone() \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u526f\u672c\uff0c\u5141\u8bb8\u521b\u5efa\u5177\u6709\u4e0d\u540c\u7ef4\u5ea6\u7684\u5b50\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/15\/2024111507212485762.jpg\" class=\"aligncenter\" title=\"Java\u4e2d\u600e\u4e48\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570\u63d2\u56fe\" alt=\"Java\u4e2d\u600e\u4e48\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u7ef4\u6570\u7531\u5176\u58f0\u660e\u7684\u7c7b\u578b\u51b3\u5b9a\uff0c\u5e76\u4e14\u5728\u521b\u5efa\u540e\u4e0d\u53ef\u66f4\u6539\u3002\u4f46\u662f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u591a\u7ef4\u6570\u7ec4\u548c\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u6765\u6a21\u62df\u624b\u52a8\u63a7\u5236\u7ef4\u6570\u3002<\/p>\n<p><strong>\u591a\u7ef4\u6570\u7ec4<\/strong><\/p>\n<p>\u591a\u7ef4\u6570\u7ec4\u662f\u5177\u6709\u591a\u4e2a\u7ef4\u5ea6\u7684\u6570\u7ec4\u3002\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u58f0\u660e\u591a\u7ef4\u6570\u7ec4\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[][] array2D = new int[3][4];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u4e2a\u4f8b\u5b50\u521b\u5efa\u4e00\u4e2a\u4e8c\u7ef4\u6570\u7ec4\uff0c\u5177\u6709 3 \u884c\u548c 4 \u5217\u3002\u7ef4\u5ea6\u7531\u6bcf\u4e2a\u65b9\u62ec\u53f7\u5185\u7684\u6570\u5b57\u8868\u793a\u3002<\/p>\n<p>\u8981\u8bbf\u95ee\u591a\u7ef4\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u9700\u8981\u4f7f\u7528\u591a\u4e2a\u7d22\u5f15\uff1a<\/p>\n<pre>System.out.println(array2D[1][2]); \/\/ \u8f93\u51fa\u6570\u7ec4\u4e2d\u7684\u7b2c 2 \u884c\u7b2c 3 \u5217\u7684\u5143\u7d20<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5<\/strong><\/p>\n<p>\u5bf9\u4e8e\u4e0d\u53ef\u53d8\u7684\u6570\u7ec4\u7c7b\u578b\uff08\u4f8b\u5982\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff09\uff0c\u53ef\u4ee5\u901a\u8fc7\u5176\u5143\u7d20\u7684\u65b9\u6cd5\u6765\u6a21\u62df\u7ef4\u6570\uff1a<\/p>\n<ul>\n<li>length \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5bf9\u4e8e\u591a\u7ef4\u6570\u7ec4\uff0c\u8fd4\u56de\u6bcf\u4e2a\u7ef4\u5ea6\u7684\u957f\u5ea6\u3002<\/li>\n<li>clone() \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u7684\u526f\u672c\uff0c\u5141\u8bb8\u521b\u5efa\u5177\u6709\u4e0d\u540c\u7ef4\u5ea6\u7684\u5b50\u6570\u7ec4\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u8981\u521b\u5efa\u5177\u6709 3 \u5217\u7684\u5b50\u6570\u7ec4\uff0c\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<pre>int[] subarray = array2D[0].clone();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u6837\uff0csubarray \u5c31\u6210\u4e3a\u4e00\u4e2a\u4e00\u7ef4\u6570\u7ec4\uff0c\u5177\u6709 3 \u4e2a\u5143\u7d20\u3002<\/p>\n<p><strong>\u4f7f\u7528\u793a\u4f8b<\/strong><\/p>\n<p>\u901a\u8fc7\u7ed3\u5408\u591a\u7ef4\u6570\u7ec4\u548c\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6a21\u62df\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570\u3002\u4f8b\u5982\uff0c\u8981\u521b\u5efa\u4e00\u4e2a\u5177\u6709\u53ef\u53d8\u884c\u6570\u7684\u4e8c\u7ef4\u6570\u7ec4\uff0c\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<pre>int[][] array = new int[1][]; \/\/ \u521b\u5efa\u4e00\u7ef4\u6570\u7ec4\uff0c\u6bcf\u4e2a\u5143\u7d20\u662f\u4e00\u4e2a\u4e00\u7ef4\u6570\u7ec4\n\nfor (int i = 0; i &lt; 3; i++) {\n    array[i] = new int[i + 1]; \/\/ \u4e3a\u6bcf\u4e2a\u5143\u7d20\u521b\u5efa\u4e00\u4e2a\u5177\u6709 i + 1 \u5217\u7684\u4e00\u7ef4\u6570\u7ec4\n}\n\n\/\/ \u6253\u5370\u6570\u7ec4\nfor (int i = 0; i &lt; 3; i++) {\n    for (int j = 0; j &lt; array[i].length; j++) {\n        System.out.print(array[i][j] + \" \");\n    }\n    System.out.println();\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u5c06\u6253\u5370\u51fa\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/p>\n<pre>0 \n0 1 \n0 1 2<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fJava\u4e2d\u600e\u4e48\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570\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\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5b9e\u73b0\uff1a\u4f7f\u7528\u591a\u7ef4\u6570\u7ec4\u521b\u5efa\u5177\u6709\u591a\u4e2a\u7ef4\u5ea6\u7684\u6570\u7ec4\u3002\u5229\u7528\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u6765\u6a21\u62df\u7ef4\u6570\uff0c\u5982\uff1alength \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u957f\u5ea6\u3002clone() \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u526f\u672c\uff0c\u5141\u8bb8\u521b\u5efa\u5177\u6709\u4e0d\u540c\u7ef4\u5ea6\u7684\u5b50\u6570\u7ec4\u3002 Java \u4e2d\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570 \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u7ef4\u6570\u7531\u5176\u58f0\u660e\u7684\u7c7b\u578b\u51b3\u5b9a\uff0c\u5e76\u4e14\u5728\u521b\u5efa\u540e\u4e0d\u53ef\u66f4\u6539\u3002\u4f46\u662f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u591a\u7ef4\u6570\u7ec4\u548c\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u6765\u6a21\u62df\u624b\u52a8\u63a7\u5236\u7ef4\u6570\u3002 \u591a\u7ef4\u6570\u7ec4 \u591a\u7ef4\u6570\u7ec4\u662f\u5177\u6709\u591a\u4e2a\u7ef4\u5ea6\u7684\u6570\u7ec4\u3002\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u58f0\u660e\u591a\u7ef4\u6570\u7ec4\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[][] array2D = new int[3][4]; \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u4e2a\u4f8b\u5b50\u521b\u5efa\u4e00\u4e2a\u4e8c\u7ef4\u6570\u7ec4\uff0c\u5177\u6709 3 \u884c\u548c 4 \u5217\u3002\u7ef4\u5ea6\u7531\u6bcf\u4e2a\u65b9\u62ec\u53f7\u5185\u7684\u6570\u5b57\u8868\u793a\u3002 \u8981\u8bbf\u95ee\u591a\u7ef4\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u9700\u8981\u4f7f\u7528\u591a\u4e2a\u7d22\u5f15\uff1a System.out.println(array2D[1][2]); \/\/ \u8f93\u51fa\u6570\u7ec4\u4e2d\u7684\u7b2c 2 \u884c\u7b2c 3 \u5217\u7684\u5143\u7d20 \u767b\u5f55\u540e\u590d\u5236 \u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5 \u5bf9\u4e8e\u4e0d\u53ef\u53d8\u7684\u6570\u7ec4\u7c7b\u578b\uff08\u4f8b\u5982\u57fa\u672c\u6570\u636e\u7c7b\u578b\uff09\uff0c\u53ef\u4ee5\u901a\u8fc7\u5176\u5143\u7d20\u7684\u65b9\u6cd5\u6765\u6a21\u62df\u7ef4\u6570\uff1a length \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5bf9\u4e8e\u591a\u7ef4\u6570\u7ec4\uff0c\u8fd4\u56de\u6bcf\u4e2a\u7ef4\u5ea6\u7684\u957f\u5ea6\u3002 clone() \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u7684\u526f\u672c\uff0c\u5141\u8bb8\u521b\u5efa\u5177\u6709\u4e0d\u540c\u7ef4\u5ea6\u7684\u5b50\u6570\u7ec4\u3002 \u4f8b\u5982\uff0c\u8981\u521b\u5efa\u5177\u6709 3 \u5217\u7684\u5b50\u6570\u7ec4\uff0c\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a int[] subarray = array2D[0].clone(); \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u6837\uff0csubarray \u5c31\u6210\u4e3a\u4e00\u4e2a\u4e00\u7ef4\u6570\u7ec4\uff0c\u5177\u6709 3 \u4e2a\u5143\u7d20\u3002 \u4f7f\u7528\u793a\u4f8b \u901a\u8fc7\u7ed3\u5408\u591a\u7ef4\u6570\u7ec4\u548c\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6a21\u62df\u624b\u52a8\u63a7\u5236\u6570\u7ec4\u7ef4\u6570\u3002\u4f8b\u5982\uff0c\u8981\u521b\u5efa\u4e00\u4e2a\u5177\u6709\u53ef\u53d8\u884c\u6570\u7684\u4e8c\u7ef4\u6570\u7ec4\uff0c\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a [&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-38849","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38849","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=38849"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38849\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=38849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=38849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=38849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}