{"id":39741,"date":"2024-11-26T17:32:00","date_gmt":"2024-11-26T09:32:00","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39741\/"},"modified":"2024-11-26T17:32:00","modified_gmt":"2024-11-26T09:32:00","slug":"%e4%ba%8c%e7%bb%b4%e6%95%b0%e7%bb%84%e7%9a%84%e9%95%bf%e5%ba%a6%e6%80%8e%e4%b9%88%e7%ae%97java","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39741\/","title":{"rendered":"\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u7b97Java"},"content":{"rendered":"

\n \u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u5728 java \u4e2d\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u8ba1\u7b97\uff1a\u4f7f\u7528 length \u5c5e\u6027\u83b7\u53d6\u884c\u6570\u957f\u5ea6\uff1aint[][] twodimensionalarray = {{1, 2}, {3, 4}}; system.out.println(twodimensionalarray.length);\u4f7f\u7528 length \u5c5e\u6027\u7ed3\u5408\u5185\u5c42\u6570\u7ec4\u83b7\u53d6\u5217\u6570\u957f\u5ea6\uff1aint numcols = twodimensionalarray[0].length;\n<\/p><\/blockquote>\n

\"\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u7b97Java\u63d2\u56fe\"<\/p>\n

\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u5728 Java \u4e2d\u5982\u4f55\u8ba1\u7b97<\/strong><\/p>\n

\u76f4\u63a5\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6<\/strong><\/p>\n

\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u4f7f\u7528 length \u5c5e\u6027\u6765\u83b7\u53d6\u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff1a<\/p>\n

int[] oneDimensionalArray = {1, 2, 3};\nSystem.out.println(oneDimensionalArray.length); \/\/ \u8f93\u51fa\uff1a3<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5bf9\u4e8e\u4e8c\u7ef4\u6570\u7ec4\uff0clength \u5c5e\u6027\u8fd4\u56de\u7684\u662f\u6570\u7ec4\u884c\u6570\u7684\u957f\u5ea6\uff1a<\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
int[][] twoDimensionalArray = {{1, 2}, {3, 4}};\nSystem.out.println(twoDimensionalArray.length); \/\/ \u8f93\u51fa\uff1a2<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u83b7\u53d6\u5217\u6570\u957f\u5ea6<\/strong><\/p>\n
\u4e3a\u4e86\u83b7\u5f97\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 length \u5c5e\u6027\u7ed3\u5408\u5185\u5c42\u6570\u7ec4\uff1a<\/p>\n
int[][] twoDimensionalArray = {{1, 2}, {3, 4}};\nSystem.out.println(twoDimensionalArray[0].length); \/\/ \u8f93\u51fa\uff1a2<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u91cc\uff0ctwoDimensionalArray[0] \u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u7b2c\u4e00\u884c\uff0c\u800c twoDimensionalArray[0].length \u5219\u8fd4\u56de\u8be5\u884c\u7684\u5217\u6570\u3002<\/p>\n
\u793a\u4f8b<\/strong><\/p>\n
\u5047\u8bbe\u6709\u4e00\u4e2a\u4e8c\u7ef4\u6570\u7ec4 matrix\uff0c\u5176\u4e2d matrix[i] \u8868\u793a\u7b2c i \u884c\uff0c\u5219\u53ef\u4ee5\u8fd9\u6837\u8ba1\u7b97\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff1a<\/p>\n
int[][] matrix = {\n    {1, 2, 3},\n    {4, 5, 6},\n    {7, 8, 9}\n};\n\n\/\/ \u884c\u6570\u957f\u5ea6\nint numRows = matrix.length; \/\/ \u8f93\u51fa\uff1a3\n\n\/\/ \u5217\u6570\u957f\u5ea6\nint numCols = matrix[0].length; \/\/ \u8f93\u51fa\uff1a3<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u7ed3\u8bba<\/strong><\/p>\n
\u8ba1\u7b97 Java \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u9700\u8981\u8003\u8651\u6570\u7ec4\u884c\u6570\u548c\u5217\u6570\u7684\u957f\u5ea6\u3002\u53ef\u4ee5\u4f7f\u7528 length \u5c5e\u6027\u76f4\u63a5\u83b7\u53d6\u884c\u6570\uff0c\u5e76\u7ed3\u5408\u5185\u5c42\u6570\u7ec4\u6765\u83b7\u53d6\u5217\u6570\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u7b97Java\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":"
\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u5728 java \u4e2d\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u8ba1\u7b97\uff1a\u4f7f\u7528 length \u5c5e\u6027\u83b7\u53d6\u884c\u6570\u957f\u5ea6\uff1aint[][] twodimensionalarray = {{1, 2}, {3, 4}}; system.out.println(twodimensionalarray.length);\u4f7f\u7528 length \u5c5e\u6027\u7ed3\u5408\u5185\u5c42\u6570\u7ec4\u83b7\u53d6\u5217\u6570\u957f\u5ea6\uff1aint numcols = twodimensionalarray[0].length; \u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u5728 Java \u4e2d\u5982\u4f55\u8ba1\u7b97 \u76f4\u63a5\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6 \u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u4f7f\u7528 length \u5c5e\u6027\u6765\u83b7\u53d6\u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff1a int[] oneDimensionalArray = {1, 2, 3}; System.out.println(oneDimensionalArray.length); \/\/ \u8f93\u51fa\uff1a3 \u767b\u5f55\u540e\u590d\u5236 \u5bf9\u4e8e\u4e8c\u7ef4\u6570\u7ec4\uff0clength \u5c5e\u6027\u8fd4\u56de\u7684\u662f\u6570\u7ec4\u884c\u6570\u7684\u957f\u5ea6\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[][] twoDimensionalArray = {{1, 2}, {3, 4}}; System.out.println(twoDimensionalArray.length); \/\/ \u8f93\u51fa\uff1a2 \u767b\u5f55\u540e\u590d\u5236 \u83b7\u53d6\u5217\u6570\u957f\u5ea6 \u4e3a\u4e86\u83b7\u5f97\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 length \u5c5e\u6027\u7ed3\u5408\u5185\u5c42\u6570\u7ec4\uff1a int[][] twoDimensionalArray = […]<\/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-39741","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39741","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=39741"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39741\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39741"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39741"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}