{"id":66062,"date":"2025-05-03T16:21:59","date_gmt":"2025-05-03T08:21:59","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66062\/"},"modified":"2025-05-03T16:21:59","modified_gmt":"2025-05-03T08:21:59","slug":"java%e6%80%8e%e4%b9%88%e8%be%93%e5%87%ba%e6%95%b0%e7%bb%84%e9%87%8c%e7%9a%84%e5%85%83%e7%b4%a0%e4%b8%aa%e6%95%b0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66062\/","title":{"rendered":"java\u600e\u4e48\u8f93\u51fa\u6570\u7ec4\u91cc\u7684\u5143\u7d20\u4e2a\u6570"},"content":{"rendered":"<blockquote><p>\n  \u83b7\u53d6 java \u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\u6709\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u4f7f\u7528 length \u5c5e\u6027\uff1a\u6570\u7ec4\u5185\u7f6e length \u5c5e\u6027\uff0c\u8fd4\u56de\u5143\u7d20\u4e2a\u6570\u3002\u4f7f\u7528 arrays.stream(array).count()\uff1a\u521b\u5efa\u6570\u7ec4\u6d41\u5e76\u8c03\u7528 count() \u65b9\u6cd5\uff0c\u8fd4\u56de\u5143\u7d20\u4e2a\u6570\u3002\u4f7f\u7528\u5faa\u73af\uff1a\u904d\u5386\u6570\u7ec4\u5e76\u8ba1\u7b97\u5143\u7d20\u4e2a\u6570\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/14\/2024111413035636699.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u8f93\u51fa\u6570\u7ec4\u91cc\u7684\u5143\u7d20\u4e2a\u6570\u63d2\u56fe\" alt=\"java\u600e\u4e48\u8f93\u51fa\u6570\u7ec4\u91cc\u7684\u5143\u7d20\u4e2a\u6570\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u83b7\u53d6 Java \u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\uff1f<\/strong><\/p>\n<p>\u8981\u83b7\u53d6 Java \u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 length \u5c5e\u6027<\/strong><\/p>\n<p>\u8fd9\u662f\u6700\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u4f7f\u7528\u5185\u7f6e\u7684 length \u5c5e\u6027\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] myArray = {1, 2, 3, 4, 5};\nint length = myArray.length; \/\/ length \u4e3a 5<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 Arrays.stream(array).count()<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 Arrays.stream() \u521b\u5efa\u4e00\u4e2a\u6570\u7ec4\u6d41\uff0c\u7136\u540e\u8c03\u7528 count() \u65b9\u6cd5\uff1a<\/p>\n<pre>int length = Arrays.stream(myArray).count(); \/\/ length \u4e3a 5<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528\u5faa\u73af<\/strong><\/p>\n<p>\u5982\u679c\u5faa\u73af\u904d\u5386\u6570\u7ec4\uff0c\u5e76\u8ba1\u7b97\u5143\u7d20\u4e2a\u6570\uff0c\u4e5f\u53ef\u4ee5\u83b7\u5f97\u5143\u7d20\u4e2a\u6570\uff1a<\/p>\n<pre>int length = 0;\nfor (int element : myArray) {\n  length++;\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4e0a\u8ff0\u6240\u6709\u65b9\u6cd5\u90fd\u4f1a\u8fd4\u56de\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u4e2a\u6570\u3002\u9009\u62e9\u4f7f\u7528\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u60a8\u7684\u4e2a\u4eba\u504f\u597d\u6216\u5177\u4f53\u60c5\u51b5\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u8f93\u51fa\u6570\u7ec4\u91cc\u7684\u5143\u7d20\u4e2a\u6570\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>\u83b7\u53d6 java \u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\u6709\u4ee5\u4e0b\u65b9\u6cd5\uff1a\u4f7f\u7528 length \u5c5e\u6027\uff1a\u6570\u7ec4\u5185\u7f6e length \u5c5e\u6027\uff0c\u8fd4\u56de\u5143\u7d20\u4e2a\u6570\u3002\u4f7f\u7528 arrays.stream(array).count()\uff1a\u521b\u5efa\u6570\u7ec4\u6d41\u5e76\u8c03\u7528 count() \u65b9\u6cd5\uff0c\u8fd4\u56de\u5143\u7d20\u4e2a\u6570\u3002\u4f7f\u7528\u5faa\u73af\uff1a\u904d\u5386\u6570\u7ec4\u5e76\u8ba1\u7b97\u5143\u7d20\u4e2a\u6570\u3002 \u5982\u4f55\u83b7\u53d6 Java \u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\uff1f \u8981\u83b7\u53d6 Java \u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a 1. \u4f7f\u7528 length \u5c5e\u6027 \u8fd9\u662f\u6700\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u4f7f\u7528\u5185\u7f6e\u7684 length \u5c5e\u6027\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] myArray = {1, 2, 3, 4, 5}; int length = myArray.length; \/\/ length \u4e3a 5 \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 Arrays.stream(array).count() \u53ef\u4ee5\u4f7f\u7528 Arrays.stream() \u521b\u5efa\u4e00\u4e2a\u6570\u7ec4\u6d41\uff0c\u7136\u540e\u8c03\u7528 count() \u65b9\u6cd5\uff1a int length = Arrays.stream(myArray).count(); \/\/ length [&hellip;]<\/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-66062","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66062","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=66062"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66062\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66062"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66062"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66062"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}