{"id":39087,"date":"2024-11-26T12:56:12","date_gmt":"2024-11-26T04:56:12","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39087\/"},"modified":"2024-11-26T12:56:12","modified_gmt":"2024-11-26T04:56:12","slug":"java-%e4%ba%8c%e7%bb%b4%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e7%94%a86","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39087\/","title":{"rendered":"java \u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u75286"},"content":{"rendered":"

\n \u5728 java \u4e2d\uff0c\u4e8c\u7ef4\u6570\u7ec4\u662f\u6309\u884c\u548c\u5217\u5b58\u50a8\u5728\u7f51\u683c\u4e2d\u7684\u6570\u636e\u7ed3\u6784\uff0c\u8868\u793a\u4e3a int[][] \u6216 string[][]\uff0c\u5176\u4e2d\u65b9\u62ec\u53f7\u8868\u793a\u884c\u6570\u548c\u5217\u6570\u3002\u8981\u521b\u5efa\u4e8c\u7ef4\u6570\u7ec4\uff0c\u8bf7\u4f7f\u7528 new intnumrows\u3002\u8bbf\u95ee\u5143\u7d20\u65f6\uff0c\u4f7f\u7528 myarrayrowindex\uff0c\u5176\u4e2d rowindex \u548c colindex \u662f\u7d22\u5f15\u3002\u904d\u5386\u4e8c\u7ef4\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528\u5d4c\u5957\u5faa\u73af\uff0c\u4f8b\u5982\u4f7f\u7528 for-each \u5faa\u73af\uff0c\u5982\u4e0b\u6240\u793a\uff1afor (int[] row : myarray) { for (int element : row) { \/\/ \u6267\u884c\u64cd\u4f5c } }\n<\/p><\/blockquote>\n

\"java<\/p>\n

\u5982\u4f55\u4f7f\u7528 Java \u4e2d\u7684\u4e8c\u7ef4\u6570\u7ec4<\/strong><\/p>\n

\u4e8c\u7ef4\u6570\u7ec4\u662f\u5b58\u50a8\u5728\u5177\u6709\u884c\u548c\u5217\u7684\u7f51\u683c\u4e2d\u7684\u6570\u636e\u7684\u7ed3\u6784\u3002\u5728 Java \u4e2d\uff0c\u4e8c\u7ef4\u6570\u7ec4\u4f7f\u7528\u7c7b\u578b\u58f0\u660e int[][] \u6216 String[][] \u7b49\u8868\u793a\uff0c\u5176\u4e2d\u7b2c\u4e00\u5bf9\u65b9\u62ec\u53f7\u8868\u793a\u884c\u6570\uff0c\u7b2c\u4e8c\u5bf9\u65b9\u62ec\u53f7\u8868\u793a\u5217\u6570\u3002<\/p>\n

\u521b\u5efa\u4e8c\u7ef4\u6570\u7ec4<\/strong><\/p>\n

\u8981\u521b\u5efa\u4e8c\u7ef4\u6570\u7ec4\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n

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

int[][] myArray = new int[numRows][numCols];<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d numRows \u6307\u5b9a\u6570\u7ec4\u7684\u884c\u6570\uff0cnumCols \u6307\u5b9a\u6570\u7ec4\u7684\u5217\u6570\u3002<\/p>\n
\u8bbf\u95ee\u5143\u7d20<\/strong><\/p>\n
\u8981\u8bbf\u95ee\u4e8c\u7ef4\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n
myArray[rowIndex][colIndex];<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d rowIndex \u662f\u8981\u8bbf\u95ee\u7684\u884c\u7d22\u5f15\uff0ccolIndex \u662f\u8981\u8bbf\u95ee\u7684\u5217\u7d22\u5f15\u3002<\/p>\n
\u904d\u5386\u4e8c\u7ef4\u6570\u7ec4<\/strong><\/p>\n
\u60a8\u53ef\u4ee5\u4f7f\u7528\u5d4c\u5957\u5faa\u73af\u904d\u5386\u4e8c\u7ef4\u6570\u7ec4\u3002\u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528 for-each \u5faa\u73af\u6765\u904d\u5386\u6570\u7ec4\uff1a<\/p>\n
for (int[] row : myArray) {\n    for (int element : row) {\n        \/\/ \u6267\u884c\u64cd\u4f5c\n    }\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5b9e\u4f8b<\/strong><\/p>\n
\u8003\u8651\u4e00\u4e2a 3×4 \u4e8c\u7ef4\u6574\u6570\u6570\u7ec4\uff1a<\/p>\n
int[][] myArray = {\n    {1, 2, 3, 4},\n    {5, 6, 7, 8},\n    {9, 10, 11, 12}\n};<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8981\u8bbf\u95ee\u5143\u7d20 (2, 3)\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
int element = myArray[2][3]; \/\/ \u8f93\u51fa\uff1a12<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8981\u904d\u5386\u6570\u7ec4\u5e76\u6253\u5370\u6240\u6709\u5143\u7d20\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
for (int[] row : myArray) {\n    for (int element : row) {\n        System.out.print(element + \" \");\n    }\n\n    System.out.println(); \/\/ \u65b0\u884c\n}\n\n\/\/ \u8f93\u51fa\uff1a\n\/\/ 1 2 3 4\n\/\/ 5 6 7 8\n\/\/ 9 10 11 12<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4ee5\u4e0a\u5c31\u662fjava \u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u75286\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":"
\u5728 java \u4e2d\uff0c\u4e8c\u7ef4\u6570\u7ec4\u662f\u6309\u884c\u548c\u5217\u5b58\u50a8\u5728\u7f51\u683c\u4e2d\u7684\u6570\u636e\u7ed3\u6784\uff0c\u8868\u793a\u4e3a int[][] \u6216 string[][]\uff0c\u5176\u4e2d\u65b9\u62ec\u53f7\u8868\u793a\u884c\u6570\u548c\u5217\u6570\u3002\u8981\u521b\u5efa\u4e8c\u7ef4\u6570\u7ec4\uff0c\u8bf7\u4f7f\u7528 new intnumrows\u3002\u8bbf\u95ee\u5143\u7d20\u65f6\uff0c\u4f7f\u7528 myarrayrowindex\uff0c\u5176\u4e2d rowindex \u548c colindex \u662f\u7d22\u5f15\u3002\u904d\u5386\u4e8c\u7ef4\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528\u5d4c\u5957\u5faa\u73af\uff0c\u4f8b\u5982\u4f7f\u7528 for-each \u5faa\u73af\uff0c\u5982\u4e0b\u6240\u793a\uff1afor (int[] row : myarray) { for (int element : row) { \/\/ \u6267\u884c\u64cd\u4f5c } } \u5982\u4f55\u4f7f\u7528 Java \u4e2d\u7684\u4e8c\u7ef4\u6570\u7ec4 \u4e8c\u7ef4\u6570\u7ec4\u662f\u5b58\u50a8\u5728\u5177\u6709\u884c\u548c\u5217\u7684\u7f51\u683c\u4e2d\u7684\u6570\u636e\u7684\u7ed3\u6784\u3002\u5728 Java \u4e2d\uff0c\u4e8c\u7ef4\u6570\u7ec4\u4f7f\u7528\u7c7b\u578b\u58f0\u660e int[][] \u6216 String[][] \u7b49\u8868\u793a\uff0c\u5176\u4e2d\u7b2c\u4e00\u5bf9\u65b9\u62ec\u53f7\u8868\u793a\u884c\u6570\uff0c\u7b2c\u4e8c\u5bf9\u65b9\u62ec\u53f7\u8868\u793a\u5217\u6570\u3002 \u521b\u5efa\u4e8c\u7ef4\u6570\u7ec4 \u8981\u521b\u5efa\u4e8c\u7ef4\u6570\u7ec4\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[][] myArray = new int[numRows][numCols]; \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d numRows \u6307\u5b9a\u6570\u7ec4\u7684\u884c\u6570\uff0cnumCols \u6307\u5b9a\u6570\u7ec4\u7684\u5217\u6570\u3002 \u8bbf\u95ee\u5143\u7d20 \u8981\u8bbf\u95ee\u4e8c\u7ef4\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a […]<\/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-39087","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39087","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=39087"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39087\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}