{"id":65721,"date":"2025-05-03T09:21:00","date_gmt":"2025-05-03T01:21:00","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65721\/"},"modified":"2025-05-03T09:21:00","modified_gmt":"2025-05-03T01:21:00","slug":"java%e6%80%8e%e4%b9%88%e5%be%97%e5%88%b0%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\/65721\/","title":{"rendered":"java\u600e\u4e48\u5f97\u5230\u6570\u7ec4\u7684\u957f\u5ea6"},"content":{"rendered":"

\n \u5982\u4f55\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff1a\u76f4\u63a5\u8bbf\u95ee length \u5c5e\u6027\uff1aint[] arr = {1, 2, 3, 4, 5};int length = arr.length; \/\/ \u8fd4\u56de\u503c\uff1a5\u4f7f\u7528 array.getlength() \u65b9\u6cd5\uff08\u5df2\u5f03\u7528\uff09\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6 length \u5b57\u6bb5\u7684\u503c\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u5f97\u5230\u6570\u7ec4\u7684\u957f\u5ea6\u63d2\u56fe\"<\/p>\n

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

\u76f4\u63a5\u8bbf\u95ee length \u5c5e\u6027<\/strong><\/p>\n

Java \u6570\u7ec4\u63d0\u4f9b\u4e86 length \u5c5e\u6027\uff0c\u5b83\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u8981\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u53ea\u9700\u8bbf\u95ee\u6b64\u5c5e\u6027\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

int[] arr = {1, 2, 3, 4, 5};\nint length = arr.length; \/\/ \u8fd4\u56de\u503c\uff1a5<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u76f4\u63a5\uff0c\u9002\u7528\u4e8e\u6240\u6709\u7c7b\u578b\u7684\u6570\u7ec4\u3002<\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
\u5176\u4ed6\u65b9\u6cd5<\/strong><\/p>\n
\u9664\u4e86 length \u5c5e\u6027\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff1a<\/p>\n
    \n
  •  Array.getLength() \u65b9\u6cd5\uff1a<\/strong> Array \u7c7b\u63d0\u4f9b\u4e86\u4e00\u4e2a getLength() \u65b9\u6cd5\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\u5e76\u8fd4\u56de\u5176\u957f\u5ea6\u3002\u4f46\u662f\uff0c\u6b64\u65b9\u6cd5\u5df2\u88ab\u5f03\u7528\uff0c\u4e0d\u5efa\u8bae\u4f7f\u7528\u3002<\/li>\n
  •  \u53cd\u5c04\uff1a<\/strong> \u901a\u8fc7\u53cd\u5c04\uff0c\u53ef\u4ee5\u83b7\u53d6\u6570\u7ec4\u7c7b\u7684 length \u5b57\u6bb5\u5e76\u8fd4\u56de\u5176\u503c\u3002\u4e0d\u8fc7\uff0c\u8fd9\u79cd\u65b9\u6cd5\u6bd4\u8f83\u590d\u6742\uff0c\u4e0d\u9002\u5408\u5927\u591a\u6570\u60c5\u51b5\u3002<\/li>\n<\/ul>\n
    \u793a\u4f8b<\/strong><\/p>\n
    \u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u4e0d\u540c\u65b9\u6cd5\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff1a<\/p>\n
    int[] arr = {1, 2, 3, 4, 5};\n\n\/\/ \u4f7f\u7528 length \u5c5e\u6027\nint length1 = arr.length;\n\n\/\/ \u4f7f\u7528 Array.getLength() \u65b9\u6cd5\nint length2 = Array.getLength(arr);\n\n\/\/ \u4f7f\u7528\u53cd\u5c04\nClass<?> clazz = arr.getClass();\nField lengthField = clazz.getField(\"length\");\nint length3 = (int) lengthField.get(arr);\n\nSystem.out.println(\"Length: \" + length1 + \", \" + length2 + \", \" + length3);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8f93\u51fa\uff1a<\/strong><\/p>\n
    Length: 5, 5, 5<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5f97\u5230\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":"
    \u5982\u4f55\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff1a\u76f4\u63a5\u8bbf\u95ee length \u5c5e\u6027\uff1aint[] arr = {1, 2, 3, 4, 5};int length = arr.length; \/\/ \u8fd4\u56de\u503c\uff1a5\u4f7f\u7528 array.getlength() \u65b9\u6cd5\uff08\u5df2\u5f03\u7528\uff09\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6 length \u5b57\u6bb5\u7684\u503c \u5982\u4f55\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6 \u76f4\u63a5\u8bbf\u95ee length \u5c5e\u6027 Java \u6570\u7ec4\u63d0\u4f9b\u4e86 length \u5c5e\u6027\uff0c\u5b83\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u8981\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u53ea\u9700\u8bbf\u95ee\u6b64\u5c5e\u6027\uff0c\u5982\u4e0b\u6240\u793a\uff1a int[] arr = {1, 2, 3, 4, 5}; int length = arr.length; \/\/ \u8fd4\u56de\u503c\uff1a5 \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u76f4\u63a5\uff0c\u9002\u7528\u4e8e\u6240\u6709\u7c7b\u578b\u7684\u6570\u7ec4\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u5176\u4ed6\u65b9\u6cd5 \u9664\u4e86 length \u5c5e\u6027\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff1a Array.getLength() \u65b9\u6cd5\uff1a Array \u7c7b\u63d0\u4f9b\u4e86\u4e00\u4e2a getLength() \u65b9\u6cd5\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\u5e76\u8fd4\u56de\u5176\u957f\u5ea6\u3002\u4f46\u662f\uff0c\u6b64\u65b9\u6cd5\u5df2\u88ab\u5f03\u7528\uff0c\u4e0d\u5efa\u8bae\u4f7f\u7528\u3002 \u53cd\u5c04\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-65721","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65721","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=65721"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65721\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}