{"id":67024,"date":"2025-05-03T09:30:59","date_gmt":"2025-05-03T01:30:59","guid":{"rendered":"https:\/\/fwq.ai\/blog\/67024\/"},"modified":"2025-05-03T09:30:59","modified_gmt":"2025-05-03T01:30:59","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e8%be%93%e5%87%ba%e4%b8%80%e4%b8%aa%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\/67024\/","title":{"rendered":"java\u4e2d\u600e\u4e48\u8f93\u51fa\u4e00\u4e2a\u6570\u7ec4\u7684\u957f\u5ea6"},"content":{"rendered":"

\n java \u4e2d\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 length \u5c5e\u6027\u3002\u83b7\u53d6\u957f\u5ea6\u7684\u6b65\u9aa4\u5305\u62ec\uff1a\u58f0\u660e\u6570\u7ec4\u3001\u4f7f\u7528 length \u5c5e\u6027\u3001\u6253\u5370\u957f\u5ea6\u3002\u793a\u4f8b\u4e2d\uff0c\u6570\u7ec4 numbers \u7684\u957f\u5ea6\u4e3a 5\u3002\n<\/p><\/blockquote>\n

\"java\u4e2d\u600e\u4e48\u8f93\u51fa\u4e00\u4e2a\u6570\u7ec4\u7684\u957f\u5ea6\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u83b7\u53d6 Java \u4e2d\u6570\u7ec4\u7684\u957f\u5ea6<\/strong><\/p>\n

Java \u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u4e2a\u53ef\u4ee5\u5b58\u50a8\u56fa\u5b9a\u6570\u91cf\u5143\u7d20\u7684\u6570\u636e\u7ed3\u6784\u3002\u8981\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5373\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528 length \u5c5e\u6027\u3002<\/p>\n

\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u7684\u6b65\u9aa4\uff1a<\/strong><\/p>\n

    \n
  1. \n

    \u58f0\u660e\u4e00\u4e2a\u6570\u7ec4\uff1a<\/strong><\/p>\n

    \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

    int[] myArray = {1, 2, 3, 4, 5};<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  2. \n
    \u4f7f\u7528 length \u5c5e\u6027\uff1a<\/strong><\/p>\n
    int length = myArray.length;<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  3. \n
    \u6253\u5370\u957f\u5ea6\uff1a<\/strong><\/p>\n
    System.out.println(length); \/\/ \u8f93\u51fa\uff1a5<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ol>\n
    \u793a\u4f8b\uff1a<\/strong><\/p>\n
    \u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u5982\u4f55\u83b7\u53d6\u4e00\u4e2a\u6570\u7ec4\u7684\u957f\u5ea6\uff1a<\/p>\n
    import java.util.Arrays;\n\npublic class ArrayLength {\n\n    public static void main(String[] args) {\n        int[] numbers = {1, 2, 3, 4, 5};\n\n        System.out.println(\"\u6570\u7ec4\u7684\u957f\u5ea6\uff1a\" + numbers.length); \/\/ \u8f93\u51fa\uff1a5\n\n        \/\/ \u4f7f\u7528 Arrays.toString \u65b9\u6cd5\u6253\u5370\u6570\u7ec4\u5143\u7d20\n        System.out.println(Arrays.toString(numbers));\n    }\n}<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u600e\u4e48\u8f93\u51fa\u4e00\u4e2a\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":"
    java \u4e2d\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 length \u5c5e\u6027\u3002\u83b7\u53d6\u957f\u5ea6\u7684\u6b65\u9aa4\u5305\u62ec\uff1a\u58f0\u660e\u6570\u7ec4\u3001\u4f7f\u7528 length \u5c5e\u6027\u3001\u6253\u5370\u957f\u5ea6\u3002\u793a\u4f8b\u4e2d\uff0c\u6570\u7ec4 numbers \u7684\u957f\u5ea6\u4e3a 5\u3002 \u5982\u4f55\u83b7\u53d6 Java \u4e2d\u6570\u7ec4\u7684\u957f\u5ea6 Java \u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u4e2a\u53ef\u4ee5\u5b58\u50a8\u56fa\u5b9a\u6570\u91cf\u5143\u7d20\u7684\u6570\u636e\u7ed3\u6784\u3002\u8981\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\uff0c\u5373\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528 length \u5c5e\u6027\u3002 \u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u7684\u6b65\u9aa4\uff1a \u58f0\u660e\u4e00\u4e2a\u6570\u7ec4\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] myArray = {1, 2, 3, 4, 5}; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 length \u5c5e\u6027\uff1a int length = myArray.length; \u767b\u5f55\u540e\u590d\u5236 \u6253\u5370\u957f\u5ea6\uff1a System.out.println(length); \/\/ \u8f93\u51fa\uff1a5 \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b\uff1a \u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u5982\u4f55\u83b7\u53d6\u4e00\u4e2a\u6570\u7ec4\u7684\u957f\u5ea6\uff1a import java.util.Arrays; public class ArrayLength { public static void main(String[] args) { […]<\/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-67024","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67024","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=67024"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67024\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=67024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=67024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=67024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}