{"id":34956,"date":"2024-11-26T10:02:50","date_gmt":"2024-11-26T02:02:50","guid":{"rendered":"https:\/\/fwq.ai\/blog\/34956\/"},"modified":"2024-11-26T10:02:50","modified_gmt":"2024-11-26T02:02:50","slug":"java%e4%b8%ad%e5%ad%97%e7%ac%a6%e6%95%b0%e7%bb%84%e7%9a%84%e9%95%bf%e5%ba%a6%e6%80%8e%e4%b9%88%e5%8f%96","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/34956\/","title":{"rendered":"java\u4e2d\u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u53d6"},"content":{"rendered":"<blockquote><p>\n  java \u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u83b7\u53d6\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u4f7f\u7528 length() \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u8bed\u6cd5\uff1aint length()\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/03\/2024110306512082212.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u53d6\u63d2\u56fe\" alt=\"java\u4e2d\u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u53d6\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u83b7\u53d6<\/strong><\/p>\n<p>Java\u4e2d\u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u83b7\u53d6\uff1a<\/p>\n<p><strong>length() \u65b9\u6cd5<\/strong><\/p>\n<p>length() \u65b9\u6cd5\u662f Java \u4e2d\u6240\u6709\u6570\u7ec4\u7c7b\u7684\u516c\u5171\u65b9\u6cd5\uff0c\u5b83\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\uff0c\u9002\u7528\u4e8e\u5b57\u7b26\u6570\u7ec4\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>\u8bed\u6cd5\uff1a<\/strong><\/p>\n<pre>int length()<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>char[] arr = {'H', 'e', 'l', 'l', 'o'};\nint len = arr.length;\nSystem.out.println(\"\u6570\u7ec4\u957f\u5ea6\uff1a\" + len); \/\/ \u8f93\u51fa\uff1a5<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n<ul>\n<li>length() \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\uff0c\u800c\u4e0d\u662f\u6570\u7ec4\u7684\u5bb9\u91cf\u3002<\/li>\n<li>length() \u65b9\u6cd5\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(1)\uff0c\u56e0\u4e3a\u5b83\u662f\u76f4\u63a5\u4ece\u6570\u7ec4\u5bf9\u8c61\u4e2d\u8bfb\u53d6\u957f\u5ea6\u503c\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u53d6\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>java \u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u83b7\u53d6\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u4f7f\u7528 length() \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u8bed\u6cd5\uff1aint length() Java \u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u83b7\u53d6 Java\u4e2d\u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u83b7\u53d6\uff1a length() \u65b9\u6cd5 length() \u65b9\u6cd5\u662f Java \u4e2d\u6240\u6709\u6570\u7ec4\u7c7b\u7684\u516c\u5171\u65b9\u6cd5\uff0c\u5b83\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\uff0c\u9002\u7528\u4e8e\u5b57\u7b26\u6570\u7ec4\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u8bed\u6cd5\uff1a int length() \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b\uff1a char[] arr = {&#8216;H&#8217;, &#8216;e&#8217;, &#8216;l&#8217;, &#8216;l&#8217;, &#8216;o&#8217;}; int len = arr.length; System.out.println(&#8220;\u6570\u7ec4\u957f\u5ea6\uff1a&#8221; + len); \/\/ \u8f93\u51fa\uff1a5 \u767b\u5f55\u540e\u590d\u5236 \u6ce8\u610f\u4e8b\u9879\uff1a length() \u65b9\u6cd5\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\uff0c\u800c\u4e0d\u662f\u6570\u7ec4\u7684\u5bb9\u91cf\u3002 length() \u65b9\u6cd5\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(1)\uff0c\u56e0\u4e3a\u5b83\u662f\u76f4\u63a5\u4ece\u6570\u7ec4\u5bf9\u8c61\u4e2d\u8bfb\u53d6\u957f\u5ea6\u503c\u3002 \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u5b57\u7b26\u6570\u7ec4\u7684\u957f\u5ea6\u600e\u4e48\u53d6\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\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-34956","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34956","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=34956"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34956\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=34956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=34956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=34956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}