{"id":34849,"date":"2024-11-26T13:35:26","date_gmt":"2024-11-26T05:35:26","guid":{"rendered":"https:\/\/fwq.ai\/blog\/34849\/"},"modified":"2024-11-26T13:35:26","modified_gmt":"2024-11-26T05:35:26","slug":"java%e6%95%b0%e7%bb%84%e9%95%bf%e5%ba%a6%e6%80%8e%e4%b9%88%e8%a1%a8%e7%a4%ba%e4%bb%80%e4%b9%88%e4%b8%8d%e5%90%8c%e7%9a%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/34849\/","title":{"rendered":"java\u6570\u7ec4\u957f\u5ea6\u600e\u4e48\u8868\u793a\u4ec0\u4e48\u4e0d\u540c\u7684"},"content":{"rendered":"

\n java\u6570\u7ec4\u957f\u5ea6\u8868\u793a\u4e3a\u6574\u578b\u503c\uff0c\u8868\u793a\u5143\u7d20\u6570\u91cf\u3002\u83b7\u53d6\u65b9\u5f0f\u6709\u4e24\u79cd\uff1a1\uff09length\u5c5e\u6027\u8fd4\u56de\u6570\u7ec4\u5bf9\u8c61\u5143\u7d20\u6570\u91cf\uff1b2\uff09\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u5728\u7f16\u8bd1\u65f6\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u3002\u9996\u9009length\u5c5e\u6027\u7528\u4e8e\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u6216\u672a\u77e5\u957f\u5ea6\u6570\u7ec4\uff0c\u800c\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u7528\u4e8e\u56fa\u5b9a\u5927\u5c0f\u6216\u5df2\u77e5\u957f\u5ea6\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n

\"java\u6570\u7ec4\u957f\u5ea6\u600e\u4e48\u8868\u793a\u4ec0\u4e48\u4e0d\u540c\u7684\u63d2\u56fe\"<\/p>\n

Java\u6570\u7ec4\u957f\u5ea6\u8868\u793a<\/strong><\/p>\n

\u7b80\u4ecb<\/strong>
\u5728Java\u4e2d\uff0c\u6570\u7ec4\u7684\u957f\u5ea6\u8868\u793a\u4e3a\u4e00\u4e2a\u6574\u578b\u503c\uff0c\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002<\/p>\n

\u8868\u793a\u65b9\u5f0f<\/strong>
\u6570\u7ec4\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u8868\u793a\uff1a<\/p>\n

    \n
  1. length\u5c5e\u6027<\/strong>\uff1a\u6570\u7ec4\u5bf9\u8c61\u6709\u4e00\u4e2a\u540d\u4e3alength\u7684\u5c5e\u6027\uff0c\u5b83\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n
    int[] arr = new int[10];\nSystem.out.println(arr.length); \/\/ \u8f93\u51fa 10<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \n
    1.  \u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f<\/strong>\uff1a\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u5c06\u6570\u7ec4\u540d\u4f5c\u4e3a\u4e00\u4e2a\u8868\u8fbe\u5f0f\u6765\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ol>\n
      int[] arr = {1, 2, 3, 4, 5};\nSystem.out.println(arr.length); \/\/ \u8f93\u51fa 5<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4e0d\u540c\u4e4b\u5904<\/strong>
      length\u5c5e\u6027\u548c\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u8868\u793a\u6570\u7ec4\u957f\u5ea6\u4e4b\u95f4\u5b58\u5728\u4e24\u4e2a\u4e3b\u8981\uff1a<\/p>\n
      \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
        \n
      1.  \u7c7b\u578b<\/strong>\uff1alength\u5c5e\u6027\u8fd4\u56de\u4e00\u4e2aint\u503c\uff0c\u800c\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u8fd4\u56de\u4e00\u4e2aint\u5e38\u91cf\u3002<\/li>\n
      2.  \u7f16\u8bd1\u65f6\u548c\u8fd0\u884c\u65f6<\/strong>\uff1alength\u5c5e\u6027\u4f1a\u5728\u8fd0\u884c\u65f6\u8ba1\u7b97\u6570\u7ec4\u957f\u5ea6\uff0c\u800c\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u4f1a\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a\u6570\u7ec4\u957f\u5ea6\u3002<\/li>\n<\/ol>\n
        \u9009\u62e9\u6307\u5357<\/strong><\/p>\n
          \n
        •  \u9996\u9009length\u5c5e\u6027<\/strong>\uff1a\u5bf9\u4e8e\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u7684\u6570\u7ec4\u6216\u4e0d\u786e\u5b9a\u7684\u6570\u7ec4\u957f\u5ea6\uff0c\u4f7f\u7528length\u5c5e\u6027\u66f4\u5408\u9002\u3002<\/li>\n
        •  \u4f7f\u7528\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f<\/strong>\uff1a\u5bf9\u4e8e\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u7ec4\u6216\u5df2\u77e5\u6570\u7ec4\u957f\u5ea6\uff0c\u4f7f\u7528\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n
          \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u957f\u5ea6\u600e\u4e48\u8868\u793a\u4ec0\u4e48\u4e0d\u540c\u7684\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":"
          java\u6570\u7ec4\u957f\u5ea6\u8868\u793a\u4e3a\u6574\u578b\u503c\uff0c\u8868\u793a\u5143\u7d20\u6570\u91cf\u3002\u83b7\u53d6\u65b9\u5f0f\u6709\u4e24\u79cd\uff1a1\uff09length\u5c5e\u6027\u8fd4\u56de\u6570\u7ec4\u5bf9\u8c61\u5143\u7d20\u6570\u91cf\uff1b2\uff09\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u5728\u7f16\u8bd1\u65f6\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u3002\u9996\u9009length\u5c5e\u6027\u7528\u4e8e\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u6216\u672a\u77e5\u957f\u5ea6\u6570\u7ec4\uff0c\u800c\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u7528\u4e8e\u56fa\u5b9a\u5927\u5c0f\u6216\u5df2\u77e5\u957f\u5ea6\u6570\u7ec4\u3002 Java\u6570\u7ec4\u957f\u5ea6\u8868\u793a \u7b80\u4ecb\u5728Java\u4e2d\uff0c\u6570\u7ec4\u7684\u957f\u5ea6\u8868\u793a\u4e3a\u4e00\u4e2a\u6574\u578b\u503c\uff0c\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002 \u8868\u793a\u65b9\u5f0f\u6570\u7ec4\u957f\u5ea6\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u8868\u793a\uff1a length\u5c5e\u6027\uff1a\u6570\u7ec4\u5bf9\u8c61\u6709\u4e00\u4e2a\u540d\u4e3alength\u7684\u5c5e\u6027\uff0c\u5b83\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u4f8b\u5982\uff1a int[] arr = new int[10]; System.out.println(arr.length); \/\/ \u8f93\u51fa 10 \u767b\u5f55\u540e\u590d\u5236 \u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\uff1a\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u5c06\u6570\u7ec4\u540d\u4f5c\u4e3a\u4e00\u4e2a\u8868\u8fbe\u5f0f\u6765\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u3002\u4f8b\u5982\uff1a int[] arr = {1, 2, 3, 4, 5}; System.out.println(arr.length); \/\/ \u8f93\u51fa 5 \u767b\u5f55\u540e\u590d\u5236 \u4e0d\u540c\u4e4b\u5904length\u5c5e\u6027\u548c\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u8868\u793a\u6570\u7ec4\u957f\u5ea6\u4e4b\u95f4\u5b58\u5728\u4e24\u4e2a\u4e3b\u8981\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u7c7b\u578b\uff1alength\u5c5e\u6027\u8fd4\u56de\u4e00\u4e2aint\u503c\uff0c\u800c\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u8fd4\u56de\u4e00\u4e2aint\u5e38\u91cf\u3002 \u7f16\u8bd1\u65f6\u548c\u8fd0\u884c\u65f6\uff1alength\u5c5e\u6027\u4f1a\u5728\u8fd0\u884c\u65f6\u8ba1\u7b97\u6570\u7ec4\u957f\u5ea6\uff0c\u800c\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u4f1a\u5728\u7f16\u8bd1\u65f6\u786e\u5b9a\u6570\u7ec4\u957f\u5ea6\u3002 \u9009\u62e9\u6307\u5357 \u9996\u9009length\u5c5e\u6027\uff1a\u5bf9\u4e8e\u52a8\u6001\u8c03\u6574\u5927\u5c0f\u7684\u6570\u7ec4\u6216\u4e0d\u786e\u5b9a\u7684\u6570\u7ec4\u957f\u5ea6\uff0c\u4f7f\u7528length\u5c5e\u6027\u66f4\u5408\u9002\u3002 \u4f7f\u7528\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\uff1a\u5bf9\u4e8e\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u7ec4\u6216\u5df2\u77e5\u6570\u7ec4\u957f\u5ea6\uff0c\u4f7f\u7528\u6570\u7ec4\u540d\u4f5c\u4e3a\u8868\u8fbe\u5f0f\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002 \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u957f\u5ea6\u600e\u4e48\u8868\u793a\u4ec0\u4e48\u4e0d\u540c\u7684\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-34849","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34849","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=34849"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34849\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=34849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=34849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=34849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}