{"id":66838,"date":"2025-05-03T10:09:38","date_gmt":"2025-05-03T02:09:38","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66838\/"},"modified":"2025-05-03T10:09:38","modified_gmt":"2025-05-03T02:09:38","slug":"java%e6%80%8e%e4%b9%88%e8%8e%b7%e5%8f%96%e4%ba%8c%e7%bb%b4%e6%95%b0%e7%bb%84%e7%9a%84%e9%95%bf%e5%ba%a6-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66838\/","title":{"rendered":"java\u600e\u4e48\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6"},"content":{"rendered":"

\n \u8981\u83b7\u53d6 java \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 length \u5c5e\u6027\uff1a\u83b7\u53d6\u884c\u6570\uff1aint numrows = array2d.length;\u83b7\u53d6\u5217\u6570\uff1aint numcols = array2d[0].length;\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u83b7\u53d6 Java \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6<\/strong><\/p>\n

\u56de\u7b54\uff1a<\/strong><\/p>\n

\u8981\u83b7\u53d6 Java \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 length \u5c5e\u6027\u3002<\/p>\n

\u8be6\u7ec6\u8bf4\u660e\uff1a<\/strong><\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

\u4e8c\u7ef4\u6570\u7ec4\u662f\u4e00\u4e2a\u6570\u7ec4\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u7528\u4ee5\u4e0b\u8bed\u6cd5\u58f0\u660e\uff1a<\/p>\n

int[][] array2D = new int[numRows][numCols];<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d numRows \u662f\u6570\u7ec4\u7684\u884c\u6570\uff0cnumCols \u662f\u6570\u7ec4\u7684\u5217\u6570\u3002<\/p>\n
\u8981\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u884c\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
int numRows = array2D.length;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8981\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
int numCols = array2D[0].length;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u53ef\u80fd\u5728\u4e0d\u540c\u7684\u884c\u4e2d\u4e0d\u4e00\u81f4\u3002\u56e0\u6b64\uff0c\u5fc5\u987b\u4ece\u6570\u7ec4\u7684\u7b2c\u4e00\u884c\u83b7\u53d6\u5217\u6570\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
\u4ee5\u4e0b\u662f\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u957f\u5ea6\u7684\u793a\u4f8b\uff1a<\/p>\n
int[][] array2D = {\n    {1, 2, 3},\n    {4, 5, 6},\n    {7, 8, 9}\n};\n\nint numRows = array2D.length; \/\/ \u8f93\u51fa\uff1a3\nint numCols = array2D[0].length; \/\/ \u8f93\u51fa\uff1a3<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8981\u83b7\u53d6 java \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 length \u5c5e\u6027\uff1a\u83b7\u53d6\u884c\u6570\uff1aint numrows = array2d.length;\u83b7\u53d6\u5217\u6570\uff1aint numcols = array2d[0].length; \u5982\u4f55\u83b7\u53d6 Java \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6 \u56de\u7b54\uff1a \u8981\u83b7\u53d6 Java \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528 length \u5c5e\u6027\u3002 \u8be6\u7ec6\u8bf4\u660e\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4e8c\u7ef4\u6570\u7ec4\u662f\u4e00\u4e2a\u6570\u7ec4\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u7528\u4ee5\u4e0b\u8bed\u6cd5\u58f0\u660e\uff1a int[][] array2D = new int[numRows][numCols]; \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d numRows \u662f\u6570\u7ec4\u7684\u884c\u6570\uff0cnumCols \u662f\u6570\u7ec4\u7684\u5217\u6570\u3002 \u8981\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u884c\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a int numRows = array2D.length; \u767b\u5f55\u540e\u590d\u5236 \u8981\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a int numCols = array2D[0].length; \u767b\u5f55\u540e\u590d\u5236 \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u53ef\u80fd\u5728\u4e0d\u540c\u7684\u884c\u4e2d\u4e0d\u4e00\u81f4\u3002\u56e0\u6b64\uff0c\u5fc5\u987b\u4ece\u6570\u7ec4\u7684\u7b2c\u4e00\u884c\u83b7\u53d6\u5217\u6570\u3002 \u793a\u4f8b\uff1a \u4ee5\u4e0b\u662f\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u957f\u5ea6\u7684\u793a\u4f8b\uff1a int[][] array2D = { {1, 2, 3}, […]<\/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-66838","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66838","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=66838"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66838\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66838"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66838"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66838"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}