{"id":65850,"date":"2025-05-03T08:52:47","date_gmt":"2025-05-03T00:52:47","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65850\/"},"modified":"2025-05-03T08:52:47","modified_gmt":"2025-05-03T00:52:47","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e8%8e%b7%e5%8f%96%e6%95%b0%e7%bb%84%e7%9a%84%e5%a4%a7%e5%b0%8f-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65850\/","title":{"rendered":"java\u4e2d\u600e\u4e48\u83b7\u53d6\u6570\u7ec4\u7684\u5927\u5c0f"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\u83b7\u53d6\u6570\u7ec4\u5927\u5c0f\u6709\u4e24\u79cd\u65b9\u5f0f\uff1a\u4e00\u662f\u4f7f\u7528\u5185\u7f6e\u7684 length \u5c5e\u6027\uff0c\u4e8c\u662f\u4f7f\u7528 array.getlength() \u65b9\u6cd5\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111312422220116.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u600e\u4e48\u83b7\u53d6\u6570\u7ec4\u7684\u5927\u5c0f\u63d2\u56fe\" alt=\"java\u4e2d\u600e\u4e48\u83b7\u53d6\u6570\u7ec4\u7684\u5927\u5c0f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u83b7\u53d6\u6570\u7ec4\u5927\u5c0f<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6709\u4e24\u79cd\u83b7\u53d6\u6570\u7ec4\u5927\u5c0f\u7684\u65b9\u5f0f\uff1a<\/p>\n<p><strong>1. length \u5c5e\u6027<\/strong><\/p>\n<p>\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 length \u5c5e\u6027\u3002\u8fd9\u662f\u4e00\u4e2a\u6570\u7ec4\u5bf9\u8c61\u5185\u7f6e\u7684\u5c5e\u6027\uff0c\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] numbers = {1, 2, 3, 4, 5};\nint size = numbers.length;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. Array.getLength() \u65b9\u6cd5<\/strong><\/p>\n<p>\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528 Array.getLength() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u9759\u6001\uff0c\u63a5\u53d7\u4e00\u4e2a\u6570\u7ec4\u53c2\u6570\u5e76\u8fd4\u56de\u5176\u5927\u5c0f\u3002<\/p>\n<pre>int size = Array.getLength(numbers);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u5bf9\u4e8e\u591a\u7ef4\u6570\u7ec4\uff0clength \u5c5e\u6027\u548c Array.getLength() \u65b9\u6cd5\u90fd\u8fd4\u56de\u6700\u5916\u5c42\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/li>\n<li>\u5982\u679c\u6570\u7ec4\u4e3a null\uff0c\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u90fd\u4f1a\u629b\u51fa NullPointerException\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u600e\u4e48\u83b7\u53d6\u6570\u7ec4\u7684\u5927\u5c0f\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>\u5728 java \u4e2d\u83b7\u53d6\u6570\u7ec4\u5927\u5c0f\u6709\u4e24\u79cd\u65b9\u5f0f\uff1a\u4e00\u662f\u4f7f\u7528\u5185\u7f6e\u7684 length \u5c5e\u6027\uff0c\u4e8c\u662f\u4f7f\u7528 array.getlength() \u65b9\u6cd5\u3002 \u5982\u4f55\u5728 Java \u4e2d\u83b7\u53d6\u6570\u7ec4\u5927\u5c0f \u5728 Java \u4e2d\uff0c\u6709\u4e24\u79cd\u83b7\u53d6\u6570\u7ec4\u5927\u5c0f\u7684\u65b9\u5f0f\uff1a 1. length \u5c5e\u6027 \u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 length \u5c5e\u6027\u3002\u8fd9\u662f\u4e00\u4e2a\u6570\u7ec4\u5bf9\u8c61\u5185\u7f6e\u7684\u5c5e\u6027\uff0c\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] numbers = {1, 2, 3, 4, 5}; int size = numbers.length; \u767b\u5f55\u540e\u590d\u5236 2. Array.getLength() \u65b9\u6cd5 \u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528 Array.getLength() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u9759\u6001\uff0c\u63a5\u53d7\u4e00\u4e2a\u6570\u7ec4\u53c2\u6570\u5e76\u8fd4\u56de\u5176\u5927\u5c0f\u3002 int size = Array.getLength(numbers); \u767b\u5f55\u540e\u590d\u5236 \u6ce8\u610f\uff1a \u5bf9\u4e8e\u591a\u7ef4\u6570\u7ec4\uff0clength \u5c5e\u6027\u548c Array.getLength() \u65b9\u6cd5\u90fd\u8fd4\u56de\u6700\u5916\u5c42\u6570\u7ec4\u7684\u957f\u5ea6\u3002 \u5982\u679c\u6570\u7ec4\u4e3a null\uff0c\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u90fd\u4f1a\u629b\u51fa NullPointerException\u3002 \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u600e\u4e48\u83b7\u53d6\u6570\u7ec4\u7684\u5927\u5c0f\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-65850","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65850","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=65850"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65850\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}