{"id":65931,"date":"2025-05-03T09:18:13","date_gmt":"2025-05-03T01:18:13","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65931\/"},"modified":"2025-05-03T09:18:13","modified_gmt":"2025-05-03T01:18:13","slug":"java%e4%b8%ad%e6%95%b0%e7%bb%84%e7%9a%84%e9%95%bf%e5%ba%a6%e6%80%8e%e4%b9%88%e8%8e%b7%e5%8f%96-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65931\/","title":{"rendered":"java\u4e2d\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u83b7\u53d6"},"content":{"rendered":"

\n \u8981\u5728 java \u4e2d\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528\u8bed\u6cd5 array.length\uff0c\u5176\u4e2d array \u662f\u8981\u83b7\u53d6\u957f\u5ea6\u7684\u6570\u7ec4\u3002\u8be5\u65b9\u6cd5\u76f4\u63a5\u8bbf\u95ee\u6570\u7ec4\u7684\u5143\u6570\u636e\uff0c\u8fd4\u56de\u4e00\u4e2a\u6574\u6570\u7c7b\u578b\u7684\u957f\u5ea6\uff0c\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u662f\u4e00\u4e2a o(1) \u64cd\u4f5c\uff0c\u4e14\u6570\u7ec4\u957f\u5ea6\u5728\u521b\u5efa\u540e\u4e0d\u53ef\u66f4\u6539\u3002\n<\/p><\/blockquote>\n

\"java\u4e2d\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u83b7\u53d6\u63d2\u56fe\"<\/p>\n

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

\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u7684\u957f\u5ea6\u662f\u5176\u5143\u7d20\u6570\u91cf\u7684\u4e00\u4e2a\u56fa\u5b9a\u5c5e\u6027\u3002\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u7684\u65b9\u6cd5\u5f88\u7b80\u5355\uff1a<\/p>\n

\u8bed\u6cd5\uff1a<\/strong><\/p>\n

int length = array.length;<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u793a\u4f8b\uff1a<\/strong><\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
int[] numbers = {1, 2, 3, 4, 5};\nint length = numbers.length; \/\/ length \u5c06\u4e3a 5<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u8be6\u7ec6\u8bf4\u660e\uff1a<\/strong><\/p>\n
    \n
  • array \u662f\u8981\u83b7\u53d6\u957f\u5ea6\u7684\u6570\u7ec4\u3002<\/li>\n
  • .length \u662f\u4e00\u4e2a\u5c5e\u6027\uff0c\u5b83\u8fd4\u56de\u6570\u7ec4\u5143\u7d20\u7684\u6570\u91cf\u3002<\/li>\n
  • length \u662f\u4e00\u4e2a int \u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u5b83\u5b58\u50a8\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n
    \u6ce8\u610f\uff1a<\/strong><\/p>\n
      \n
    • \u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u662f O(1) \u64cd\u4f5c\uff0c\u56e0\u4e3a\u5b83\u76f4\u63a5\u8bbf\u95ee\u6570\u7ec4\u7684\u5143\u6570\u636e\u3002<\/li>\n
    • \u6570\u7ec4\u957f\u5ea6\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u66f4\u6539\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u83b7\u53d6\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u8981\u5728 java \u4e2d\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\uff0c\u53ef\u4ee5\u4f7f\u7528\u8bed\u6cd5 array.length\uff0c\u5176\u4e2d array \u662f\u8981\u83b7\u53d6\u957f\u5ea6\u7684\u6570\u7ec4\u3002\u8be5\u65b9\u6cd5\u76f4\u63a5\u8bbf\u95ee\u6570\u7ec4\u7684\u5143\u6570\u636e\uff0c\u8fd4\u56de\u4e00\u4e2a\u6574\u6570\u7c7b\u578b\u7684\u957f\u5ea6\uff0c\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u662f\u4e00\u4e2a o(1) \u64cd\u4f5c\uff0c\u4e14\u6570\u7ec4\u957f\u5ea6\u5728\u521b\u5efa\u540e\u4e0d\u53ef\u66f4\u6539\u3002 \u5982\u4f55\u83b7\u53d6 Java \u6570\u7ec4\u7684\u957f\u5ea6 \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u7684\u957f\u5ea6\u662f\u5176\u5143\u7d20\u6570\u91cf\u7684\u4e00\u4e2a\u56fa\u5b9a\u5c5e\u6027\u3002\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u7684\u65b9\u6cd5\u5f88\u7b80\u5355\uff1a \u8bed\u6cd5\uff1a int length = array.length; \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] numbers = {1, 2, 3, 4, 5}; int length = numbers.length; \/\/ length \u5c06\u4e3a 5 \u767b\u5f55\u540e\u590d\u5236 \u8be6\u7ec6\u8bf4\u660e\uff1a array \u662f\u8981\u83b7\u53d6\u957f\u5ea6\u7684\u6570\u7ec4\u3002 .length \u662f\u4e00\u4e2a\u5c5e\u6027\uff0c\u5b83\u8fd4\u56de\u6570\u7ec4\u5143\u7d20\u7684\u6570\u91cf\u3002 length \u662f\u4e00\u4e2a int \u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u5b83\u5b58\u50a8\u6570\u7ec4\u7684\u957f\u5ea6\u3002 \u6ce8\u610f\uff1a \u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u662f O(1) \u64cd\u4f5c\uff0c\u56e0\u4e3a\u5b83\u76f4\u63a5\u8bbf\u95ee\u6570\u7ec4\u7684\u5143\u6570\u636e\u3002 \u6570\u7ec4\u957f\u5ea6\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u66f4\u6539\u3002 \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u83b7\u53d6\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-65931","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65931","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=65931"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65931\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65931"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65931"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}