{"id":64381,"date":"2025-05-03T12:35:14","date_gmt":"2025-05-03T04:35:14","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64381\/"},"modified":"2025-05-03T12:35:14","modified_gmt":"2025-05-03T04:35:14","slug":"java%e4%ba%8c%e7%bb%b4%e6%95%b0%e7%bb%84%e9%95%bf%e5%ba%a6%e6%80%8e%e4%b9%88%e8%a1%a8%e7%a4%ba-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64381\/","title":{"rendered":"java\u4e8c\u7ef4\u6570\u7ec4\u957f\u5ea6\u600e\u4e48\u8868\u793a"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u8868\u793a\uff1a1. \u884c\u6570\u548c\u5217\u6570; 2. \u957f\u5ea6\u6570\u7ec4\uff08array.length \u8fd4\u56de\u884c\u6570\uff0carray[0].length \u8fd4\u56de\u7b2c\u4e00\u884c\u7684\u5217\u6570\uff09\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/03\/2024110308033429158.jpg\" class=\"aligncenter\" title=\"java\u4e8c\u7ef4\u6570\u7ec4\u957f\u5ea6\u600e\u4e48\u8868\u793a\u63d2\u56fe\" alt=\"java\u4e8c\u7ef4\u6570\u7ec4\u957f\u5ea6\u600e\u4e48\u8868\u793a\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u8868\u793a<\/strong><\/p>\n<p>Java \u4e2d\uff0c\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u8868\u793a\uff1a<\/p>\n<p><strong>1. \u884c\u6570\u548c\u5217\u6570<\/strong><\/p>\n<ul>\n<li>\ud589\u6570\uff1a\u6570\u7ec4\u4e2d\u6570\u7ec4\u5143\u7d20\u7684\u4e2a\u6570\u3002<\/li>\n<li>\u5217\u6570\uff1a\u6bcf\u4e2a\u6570\u7ec4\u5143\u7d20\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\u3002<\/li>\n<\/ul>\n<pre>int[][] array = new int[3][4]; \/\/ 3 \u884c\uff0c4 \u5217<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u957f\u5ea6\u6570\u7ec4<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li>array.length\uff1a\u8fd4\u56de\u6570\u7ec4\u7684\u884c\u6570\u3002<\/li>\n<li>array[0].length\uff1a\u8fd4\u56de\u7b2c\u4e00\u884c\u7684\u5217\u6570\uff08\u6240\u6709\u884c\u5177\u6709\u76f8\u540c\u957f\u5ea6\uff09\u3002<\/li>\n<\/ul>\n<pre>int[][] array = new int[3][];\narray[0] = new int[4];\narray[1] = new int[5];\narray[2] = new int[6];\n\nSystem.out.println(\"\u884c\u6570\uff1a\" + array.length); \/\/ 3\nSystem.out.println(\"\u7b2c\u4e00\u884c\u7684\u5217\u6570\uff1a\" + array[0].length); \/\/ 4<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>int[][] matrix = {\n    {1, 2, 3},\n    {4, 5, 6},\n    {7, 8, 9}\n};\n\n\/\/ \u884c\u6570\nint numRows = matrix.length; \/\/ 3\n\n\/\/ \u5217\u6570\nint numCols = matrix[0].length; \/\/ 3<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e8c\u7ef4\u6570\u7ec4\u957f\u5ea6\u600e\u4e48\u8868\u793a\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\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u8868\u793a\uff1a1. \u884c\u6570\u548c\u5217\u6570; 2. \u957f\u5ea6\u6570\u7ec4\uff08array.length \u8fd4\u56de\u884c\u6570\uff0carray[0].length \u8fd4\u56de\u7b2c\u4e00\u884c\u7684\u5217\u6570\uff09\u3002 Java \u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u8868\u793a Java \u4e2d\uff0c\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u8868\u793a\uff1a 1. \u884c\u6570\u548c\u5217\u6570 \ud589\u6570\uff1a\u6570\u7ec4\u4e2d\u6570\u7ec4\u5143\u7d20\u7684\u4e2a\u6570\u3002 \u5217\u6570\uff1a\u6bcf\u4e2a\u6570\u7ec4\u5143\u7d20\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\u3002 int[][] array = new int[3][4]; \/\/ 3 \u884c\uff0c4 \u5217 \u767b\u5f55\u540e\u590d\u5236 2. \u957f\u5ea6\u6570\u7ec4 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b array.length\uff1a\u8fd4\u56de\u6570\u7ec4\u7684\u884c\u6570\u3002 array[0].length\uff1a\u8fd4\u56de\u7b2c\u4e00\u884c\u7684\u5217\u6570\uff08\u6240\u6709\u884c\u5177\u6709\u76f8\u540c\u957f\u5ea6\uff09\u3002 int[][] array = new int[3][]; array[0] = new int[4]; array[1] = new int[5]; array[2] = new int[6]; System.out.println(&#8220;\u884c\u6570\uff1a&#8221; + array.length); \/\/ 3 System.out.println(&#8220;\u7b2c\u4e00\u884c\u7684\u5217\u6570\uff1a&#8221; + array[0].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-64381","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64381","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=64381"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64381\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}