{"id":39067,"date":"2024-11-26T12:12:12","date_gmt":"2024-11-26T04:12:12","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39067\/"},"modified":"2024-11-26T12:12:12","modified_gmt":"2024-11-26T04:12:12","slug":"java%e4%ba%8c%e7%bb%b4%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e6%b1%82%e9%95%bf%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39067\/","title":{"rendered":"java\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u6c42\u957f\u5ea6"},"content":{"rendered":"<blockquote><p>\n  \u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u6309\u884c\u6216\u5217\u6c42\u53d6\u3002\u6309\u884c\u6c42\u957f\u5ea6\uff1a\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u7ef4\u6570\u7ec4\uff0c\u83b7\u53d6\u6bcf\u884c\u7684 length \u5c5e\u6027\u5373\u53ef\u3002\u6309\u5217\u6c42\u957f\u5ea6\uff1a\u5148\u83b7\u53d6\u884c\u6570\uff0c\u518d\u83b7\u53d6\u4efb\u610f\u4e00\u884c\u7684\u5143\u7d20 length \u5c5e\u6027\u5373\u53ef\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/16\/2024111603392069067.jpg\" class=\"aligncenter\" title=\"java\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u6c42\u957f\u5ea6\u63d2\u56fe\" alt=\"java\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u6c42\u957f\u5ea6\u63d2\u56fe\" \/><\/p>\n<p><strong>java\u4e8c\u7ef4\u6570\u7ec4\u6c42\u957f\u5ea6<\/strong><\/p>\n<p><strong>\u5982\u4f55\u6c42\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff1f<\/strong><\/p>\n<p>Java\u4e2d\u7684\u4e8c\u7ef4\u6570\u7ec4\u662f\u4e00\u4e2a\u6570\u7ec4\u7684\u6570\u7ec4\uff0c\u56e0\u6b64\u6c42\u957f\u5ea6\u7684\u65b9\u6cd5\u4e0e\u4e00\u7ef4\u6570\u7ec4\u4e0d\u540c\u3002\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u6309\u884c\u6216\u6309\u5217\u6c42\u53d6\u3002<\/p>\n<p><strong>\u6309\u884c\u6c42\u957f\u5ea6<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u76f4\u63a5\u83b7\u53d6\u3002\u4e8c\u7ef4\u6570\u7ec4\u7684\u6bcf\u4e00\u884c\u90fd\u662f\u4e00\u7ef4\u6570\u7ec4\uff0c\u56e0\u6b64\u53ef\u4ee5\u5206\u522b\u83b7\u53d6\u6bcf\u884c\u7684\u957f\u5ea6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[][] arr = {\n    {1, 2, 3},\n    {4, 5, 6},\n    {7, 8, 9}\n};\n\nfor (int[] row : arr) {\n    System.out.println(\"Row length: \" + row.length);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>Row length: 3\nRow length: 3\nRow length: 3<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6309\u5217\u6c42\u957f\u5ea6<\/strong><\/p>\n<p>\u4e8c\u7ef4\u6570\u7ec4\u6309\u5217\u6c42\u957f\u5ea6\u9700\u8981\u5148\u786e\u5b9a\u5217\u6570\uff0c\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u83b7\u53d6\u884c\u6570\uff0c\u518d\u901a\u8fc7\u83b7\u53d6\u4efb\u610f\u4e00\u884c\u5143\u7d20\u7684\u957f\u5ea6\u6765\u786e\u5b9a\u5217\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[][] arr = {\n    {1, 2, 3},\n    {4, 5, 6},\n    {7, 8, 9}\n};\n\nint numRows = arr.length;\nint numCols = arr[0].length;\n\nSystem.out.println(\"Number of columns: \" + numCols);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>Number of columns: 3<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e8c\u7ef4\u6570\u7ec4\u600e\u4e48\u6c42\u957f\u5ea6\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>\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u6309\u884c\u6216\u5217\u6c42\u53d6\u3002\u6309\u884c\u6c42\u957f\u5ea6\uff1a\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u7ef4\u6570\u7ec4\uff0c\u83b7\u53d6\u6bcf\u884c\u7684 length \u5c5e\u6027\u5373\u53ef\u3002\u6309\u5217\u6c42\u957f\u5ea6\uff1a\u5148\u83b7\u53d6\u884c\u6570\uff0c\u518d\u83b7\u53d6\u4efb\u610f\u4e00\u884c\u7684\u5143\u7d20 length \u5c5e\u6027\u5373\u53ef\u3002 java\u4e8c\u7ef4\u6570\u7ec4\u6c42\u957f\u5ea6 \u5982\u4f55\u6c42\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff1f Java\u4e2d\u7684\u4e8c\u7ef4\u6570\u7ec4\u662f\u4e00\u4e2a\u6570\u7ec4\u7684\u6570\u7ec4\uff0c\u56e0\u6b64\u6c42\u957f\u5ea6\u7684\u65b9\u6cd5\u4e0e\u4e00\u7ef4\u6570\u7ec4\u4e0d\u540c\u3002\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u6309\u884c\u6216\u6309\u5217\u6c42\u53d6\u3002 \u6309\u884c\u6c42\u957f\u5ea6 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u76f4\u63a5\u83b7\u53d6\u3002\u4e8c\u7ef4\u6570\u7ec4\u7684\u6bcf\u4e00\u884c\u90fd\u662f\u4e00\u7ef4\u6570\u7ec4\uff0c\u56e0\u6b64\u53ef\u4ee5\u5206\u522b\u83b7\u53d6\u6bcf\u884c\u7684\u957f\u5ea6\u3002\u4f8b\u5982\uff1a int[][] arr = { {1, 2, 3}, {4, 5, 6}, {7, 8, 9} }; for (int[] row : arr) { System.out.println(&#8220;Row length: &#8221; + row.length); } \u767b\u5f55\u540e\u590d\u5236 \u8f93\u51fa\uff1a Row length: 3 Row length: 3 Row length: 3 \u767b\u5f55\u540e\u590d\u5236 \u6309\u5217\u6c42\u957f\u5ea6 \u4e8c\u7ef4\u6570\u7ec4\u6309\u5217\u6c42\u957f\u5ea6\u9700\u8981\u5148\u786e\u5b9a\u5217\u6570\uff0c\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u83b7\u53d6\u884c\u6570\uff0c\u518d\u901a\u8fc7\u83b7\u53d6\u4efb\u610f\u4e00\u884c\u5143\u7d20\u7684\u957f\u5ea6\u6765\u786e\u5b9a\u5217\u6570\u3002\u4f8b\u5982\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-39067","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39067","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=39067"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39067\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39067"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39067"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39067"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}