{"id":67025,"date":"2025-05-03T09:57:40","date_gmt":"2025-05-03T01:57:40","guid":{"rendered":"https:\/\/fwq.ai\/blog\/67025\/"},"modified":"2025-05-03T09:57:40","modified_gmt":"2025-05-03T01:57:40","slug":"java%e4%ba%8c%e7%bb%b4%e6%95%b0%e7%bb%84%e7%9a%84%e5%88%97%e6%95%b0%e5%92%8c%e6%80%8e%e4%b9%88%e6%b1%82-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/67025\/","title":{"rendered":"java\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u548c\u600e\u4e48\u6c42"},"content":{"rendered":"<blockquote><p>\n  java \u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee\u5176 length \u5c5e\u6027\u83b7\u53d6\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u4e2d\u7b2c\u4e00\u884c\u7684\u4e00\u7ef4\u6570\u7ec4\uff0c\u7136\u540e\u8bbf\u95ee\u5176 length \u5c5e\u6027\uff0c\u5373\u53ef\u5f97\u5230\u5217\u6570\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/18\/2024111814394185278.jpg\" class=\"aligncenter\" title=\"java\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u548c\u600e\u4e48\u6c42\u63d2\u56fe\" alt=\"java\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u548c\u600e\u4e48\u6c42\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u6c42\u89e3 Java \u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570<\/strong><\/p>\n<p>\u56de\u7b54\uff1aJava \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee\u5176 length \u5c5e\u6027\u6765\u83b7\u53d6\u3002<\/p>\n<p><strong>\u8be6\u7ec6\u89e3\u91ca\uff1a<\/strong><\/p>\n<p>\u4e8c\u7ef4\u6570\u7ec4\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u6570\u7ec4\u7684\u6570\u7ec4\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u4e00\u7ef4\u6570\u7ec4\u3002\u5728 Java \u4e2d\uff0c\u4e8c\u7ef4\u6570\u7ec4\u7684 length \u5c5e\u6027\u8fd4\u56de\u7684\u662f\u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u4e5f\u5c31\u662f\u4e8c\u7ef4\u6570\u7ec4\u7684\u884c\u6570\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u8981\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\uff0c\u9700\u8981\u8bbf\u95ee\u4e00\u7ef4\u6570\u7ec4\u7684 length \u5c5e\u6027\u3002\u5177\u4f53\u6765\u8bf4\uff1a<\/p>\n<pre>int[][] array2D = new int[3][4];\nint numColumns = array2D[0].length;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u6b64\u793a\u4f8b\u4e2d\uff0carray2D \u662f\u4e00\u4e2a 3 \u884c 4 \u5217\u7684\u4e8c\u7ef4\u6570\u7ec4\u3002array2D[0] \u4ee3\u8868\u7b2c\u4e00\u884c\uff0c\u5b83\u662f\u4e00\u4e2a\u957f\u5ea6\u4e3a 4 \u7684\u4e00\u7ef4\u6570\u7ec4\u3002\u56e0\u6b64\uff0carray2D[0].length \u8fd4\u56de\u5217\u6570 4\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5bf9\u4e8e\u6240\u6709\u884c\uff0c\u5217\u6570\u90fd\u662f\u76f8\u540c\u7684\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u8bbf\u95ee\u4efb\u4f55\u4e00\u884c\u7684 length \u5c5e\u6027\u6765\u83b7\u53d6\u5217\u6570\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u548c\u600e\u4e48\u6c42\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>java \u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee\u5176 length \u5c5e\u6027\u83b7\u53d6\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u4e2d\u7b2c\u4e00\u884c\u7684\u4e00\u7ef4\u6570\u7ec4\uff0c\u7136\u540e\u8bbf\u95ee\u5176 length \u5c5e\u6027\uff0c\u5373\u53ef\u5f97\u5230\u5217\u6570\u3002 \u5982\u4f55\u6c42\u89e3 Java \u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570 \u56de\u7b54\uff1aJava \u4e2d\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee\u5176 length \u5c5e\u6027\u6765\u83b7\u53d6\u3002 \u8be6\u7ec6\u89e3\u91ca\uff1a \u4e8c\u7ef4\u6570\u7ec4\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u6570\u7ec4\u7684\u6570\u7ec4\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u4e00\u7ef4\u6570\u7ec4\u3002\u5728 Java \u4e2d\uff0c\u4e8c\u7ef4\u6570\u7ec4\u7684 length \u5c5e\u6027\u8fd4\u56de\u7684\u662f\u4e00\u7ef4\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u4e5f\u5c31\u662f\u4e8c\u7ef4\u6570\u7ec4\u7684\u884c\u6570\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u8981\u83b7\u53d6\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\uff0c\u9700\u8981\u8bbf\u95ee\u4e00\u7ef4\u6570\u7ec4\u7684 length \u5c5e\u6027\u3002\u5177\u4f53\u6765\u8bf4\uff1a int[][] array2D = new int[3][4]; int numColumns = array2D[0].length; \u767b\u5f55\u540e\u590d\u5236 \u5728\u6b64\u793a\u4f8b\u4e2d\uff0carray2D \u662f\u4e00\u4e2a 3 \u884c 4 \u5217\u7684\u4e8c\u7ef4\u6570\u7ec4\u3002array2D[0] \u4ee3\u8868\u7b2c\u4e00\u884c\uff0c\u5b83\u662f\u4e00\u4e2a\u957f\u5ea6\u4e3a 4 \u7684\u4e00\u7ef4\u6570\u7ec4\u3002\u56e0\u6b64\uff0carray2D[0].length \u8fd4\u56de\u5217\u6570 4\u3002 \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5bf9\u4e8e\u6240\u6709\u884c\uff0c\u5217\u6570\u90fd\u662f\u76f8\u540c\u7684\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u8bbf\u95ee\u4efb\u4f55\u4e00\u884c\u7684 length \u5c5e\u6027\u6765\u83b7\u53d6\u5217\u6570\u3002 \u4ee5\u4e0a\u5c31\u662fjava\u4e8c\u7ef4\u6570\u7ec4\u7684\u5217\u6570\u548c\u600e\u4e48\u6c42\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/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-67025","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67025","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=67025"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67025\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=67025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=67025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=67025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}