{"id":64168,"date":"2025-05-03T09:41:49","date_gmt":"2025-05-03T01:41:49","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64168\/"},"modified":"2025-05-03T09:41:49","modified_gmt":"2025-05-03T01:41:49","slug":"java%e9%87%8c%e5%a4%9a%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%97-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64168\/","title":{"rendered":"java\u91cc\u591a\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u7b97"},"content":{"rendered":"<blockquote><p>\n  \u56de\u7b54\uff1ajava \u591a\u7ef4\u6570\u7ec4\u957f\u5ea6\u7684\u8ba1\u7b97\u9700\u8981\u6309\u7ef4\u5ea6\u4f9d\u6b21\u83b7\u53d6\uff0c\u901a\u8fc7 length \u5c5e\u6027\u5b9e\u73b0\u3002\u8be6\u7ec6\u63cf\u8ff0\uff1a\u4e00\u7ef4\u6570\u7ec4\uff1a\u901a\u8fc7 length \u5c5e\u6027\u83b7\u5f97\u957f\u5ea6\u3002\u4e8c\u7ef4\u6570\u7ec4\uff1a\u901a\u8fc7\u5916\u90e8\u6570\u7ec4\u7684 length \u5c5e\u6027\u83b7\u5f97\u884c\u6570\uff0c\u518d\u901a\u8fc7\u5185\u90e8\u6570\u7ec4\u7684 length \u5c5e\u6027\u83b7\u5f97\u5217\u6570\u3002\u591a\u7ef4\u6570\u7ec4\uff1a\u9010\u5c42\u4f7f\u7528 length \u5c5e\u6027\u83b7\u53d6\u6bcf\u4e2a\u7ef4\u5ea6\u7684\u957f\u5ea6\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/02\/2024110216392069447.jpg\" class=\"aligncenter\" title=\"java\u91cc\u591a\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u7b97\u63d2\u56fe\" alt=\"java\u91cc\u591a\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u7b97\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u591a\u7ef4\u6570\u7ec4\u957f\u5ea6\u7684\u8ba1\u7b97<\/strong><\/p>\n<p>\u591a\u7ef4\u6570\u7ec4\u5728 Java \u4e2d\u8868\u793a\u4e3a\u6570\u7ec4\u7684\u6570\u7ec4\uff0c\u56e0\u6b64\u8ba1\u7b97\u5176\u957f\u5ea6\u65f6\uff0c\u6211\u4eec\u9700\u8981\u8003\u8651\u6bcf\u4e2a\u7ef4\u5ea6\u3002<\/p>\n<p><strong>\u4e00\u7ef4\u6570\u7ec4<\/strong><\/p>\n<p>\u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u83b7\u5f97\u3002\u4f8b\u5982\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] arr = {1, 2, 3};\nint arrLength = arr.length; \/\/ arrLength = 3<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4e8c\u7ef4\u6570\u7ec4<\/strong><\/p>\n<p>\u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u6765\u8ba1\u7b97\u5916\u90e8\u6570\u7ec4\uff08\u884c\uff09\u7684\u957f\u5ea6\uff0c\u518d\u901a\u8fc7\u6bcf\u4e2a\u5185\u90e8\u6570\u7ec4\uff08\u5217\uff09\u7684 length \u5c5e\u6027\u6765\u8ba1\u7b97\u5185\u90e8\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[][] arr = {{1, 2, 3}, {4, 5, 6}};\nint arrLength1 = arr.length; \/\/ arrLength1 = 2 (\u884c\u6570)\nint arrLength2 = arr[0].length; \/\/ arrLength2 = 3 (\u5217\u6570)<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u591a\u7ef4\u6570\u7ec4<\/strong><\/p>\n<p>\u4e09\u7ef4\u6216\u66f4\u9ad8\u7ef4\u5ea6\u7684\u591a\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u8ba1\u7b97\u65b9\u6cd5\u4e0e\u4e8c\u7ef4\u6570\u7ec4\u7c7b\u4f3c\u3002\u5bf9\u4e8e\u6bcf\u4e2a\u7ef4\u5ea6\uff0c\u6211\u4eec\u4f7f\u7528 length \u5c5e\u6027\u6765\u83b7\u53d6\u5176\u957f\u5ea6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[][][] arr = {{{1, 2}, {3, 4}}, {{5, 6}, {7, 8}}};\nint arrLength1 = arr.length; \/\/ arrLength1 = 2 (\u6700\u5916\u5c42\u6570\u7ec4\u957f\u5ea6)\nint arrLength2 = arr[0].length; \/\/ arrLength2 = 2 (\u7b2c\u4e8c\u5c42\u6570\u7ec4\u957f\u5ea6)\nint arrLength3 = arr[0][0].length; \/\/ arrLength3 = 2 (\u7b2c\u4e09\u5c42\u6570\u7ec4\u957f\u5ea6)<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u8ba1\u7b97 Java \u591a\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u65f6\uff0c\u9700\u8981\u6309\u987a\u5e8f\u83b7\u53d6\u6bcf\u4e2a\u7ef4\u5ea6\u7684\u957f\u5ea6\u3002\u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u901a\u8fc7 length \u5c5e\u6027\u83b7\u5f97\uff0c\u800c\u591a\u7ef4\u6570\u7ec4\u5219\u9700\u8981\u9010\u5c42\u4f7f\u7528 length \u5c5e\u6027\u6765\u8ba1\u7b97\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u91cc\u591a\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u7b97\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>\u56de\u7b54\uff1ajava \u591a\u7ef4\u6570\u7ec4\u957f\u5ea6\u7684\u8ba1\u7b97\u9700\u8981\u6309\u7ef4\u5ea6\u4f9d\u6b21\u83b7\u53d6\uff0c\u901a\u8fc7 length \u5c5e\u6027\u5b9e\u73b0\u3002\u8be6\u7ec6\u63cf\u8ff0\uff1a\u4e00\u7ef4\u6570\u7ec4\uff1a\u901a\u8fc7 length \u5c5e\u6027\u83b7\u5f97\u957f\u5ea6\u3002\u4e8c\u7ef4\u6570\u7ec4\uff1a\u901a\u8fc7\u5916\u90e8\u6570\u7ec4\u7684 length \u5c5e\u6027\u83b7\u5f97\u884c\u6570\uff0c\u518d\u901a\u8fc7\u5185\u90e8\u6570\u7ec4\u7684 length \u5c5e\u6027\u83b7\u5f97\u5217\u6570\u3002\u591a\u7ef4\u6570\u7ec4\uff1a\u9010\u5c42\u4f7f\u7528 length \u5c5e\u6027\u83b7\u53d6\u6bcf\u4e2a\u7ef4\u5ea6\u7684\u957f\u5ea6\u3002 Java \u591a\u7ef4\u6570\u7ec4\u957f\u5ea6\u7684\u8ba1\u7b97 \u591a\u7ef4\u6570\u7ec4\u5728 Java \u4e2d\u8868\u793a\u4e3a\u6570\u7ec4\u7684\u6570\u7ec4\uff0c\u56e0\u6b64\u8ba1\u7b97\u5176\u957f\u5ea6\u65f6\uff0c\u6211\u4eec\u9700\u8981\u8003\u8651\u6bcf\u4e2a\u7ef4\u5ea6\u3002 \u4e00\u7ef4\u6570\u7ec4 \u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u83b7\u5f97\u3002\u4f8b\u5982\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] arr = {1, 2, 3}; int arrLength = arr.length; \/\/ arrLength = 3 \u767b\u5f55\u540e\u590d\u5236 \u4e8c\u7ef4\u6570\u7ec4 \u4e8c\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7 length \u5c5e\u6027\u6765\u8ba1\u7b97\u5916\u90e8\u6570\u7ec4\uff08\u884c\uff09\u7684\u957f\u5ea6\uff0c\u518d\u901a\u8fc7\u6bcf\u4e2a\u5185\u90e8\u6570\u7ec4\uff08\u5217\uff09\u7684 length \u5c5e\u6027\u6765\u8ba1\u7b97\u5185\u90e8\u6570\u7ec4\u7684\u957f\u5ea6\u3002\u4f8b\u5982\uff1a int[][] arr = {{1, 2, 3}, {4, 5, 6}}; int arrLength1 = [&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-64168","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64168","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=64168"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64168\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64168"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64168"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}