{"id":65947,"date":"2025-05-03T13:52:05","date_gmt":"2025-05-03T05:52:05","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65947\/"},"modified":"2025-05-03T13:52:05","modified_gmt":"2025-05-03T05:52:05","slug":"java%e6%95%b0%e7%bb%84%e5%b0%81%e8%a3%85%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e6%95%b0%e6%8d%ae-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65947\/","title":{"rendered":"java\u6570\u7ec4\u5c01\u88c5\u600e\u4e48\u6dfb\u52a0\u6570\u636e"},"content":{"rendered":"

\n java \u6570\u7ec4\u5c01\u88c5\uff08arraylist\uff09\u6dfb\u52a0\u6570\u636e\u7684\u6b65\u9aa4\uff1a\u5bfc\u5165 java.util.arraylist \u7c7b\u521b\u5efa arraylist \u5bf9\u8c61\u4f7f\u7528 add() \u65b9\u6cd5\u6dfb\u52a0\u5143\u7d20\u4f7f\u7528 size() \u65b9\u6cd5\u68c0\u67e5\u6570\u7ec4\u5c01\u88c5\u5927\u5c0f\n<\/p><\/blockquote>\n

\"java\u6570\u7ec4\u5c01\u88c5\u600e\u4e48\u6dfb\u52a0\u6570\u636e\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5411 Java \u6570\u7ec4\u5c01\u88c5\u4e2d\u6dfb\u52a0\u6570\u636e<\/strong><\/p>\n

Java \u4e2d\u7684\u6570\u7ec4\u5c01\u88c5\uff0c\u4e5f\u79f0\u4e3a ArrayList\uff0c\u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u65e8\u5728\u5b58\u50a8\u5bf9\u8c61\u3002\u5b83\u63d0\u4f9b\u4e86\u6bd4\u539f\u59cb Java \u6570\u7ec4\u66f4\u7075\u6d3b\u548c\u65b9\u4fbf\u7684\u65b9\u6cd5\u6765\u7ba1\u7406\u6570\u636e\u3002\u672c\u6587\u5c06\u6307\u5bfc\u60a8\u5982\u4f55\u5411 Java \u6570\u7ec4\u5c01\u88c5\u4e2d\u6dfb\u52a0\u6570\u636e\u3002<\/p>\n

\u6b65\u9aa4\uff1a<\/strong><\/p>\n

    \n
  1. \n

    \u5bfc\u5165 ArrayList \u7c7b\uff1a<\/strong><\/p>\n

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

      \n
    • \n

      \u5728\u60a8\u7684\u4ee3\u7801\u4e2d\u5bfc\u5165 java.util.ArrayList \u7c7b\uff1a<\/p>\n

      import java.util.ArrayList;<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ul>\n<\/li>\n
    • \n
      \u521b\u5efa ArrayList \u5bf9\u8c61\uff1a<\/strong><\/p>\n
        \n
      • \n
        \u521b\u5efa\u4e00\u4e2a ArrayList \u5bf9\u8c61\u6765\u5b58\u50a8\u60a8\u7684\u6570\u636e\uff1a<\/p>\n
        ArrayList<Integer> numbers = new ArrayList<>();<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ul>\n<\/li>\n
      • \n
        \u6dfb\u52a0\u5143\u7d20\uff1a<\/strong><\/p>\n
          \n
        • \n
          \u4f7f\u7528 add() \u65b9\u6cd5\u5c06\u5143\u7d20\u6dfb\u52a0\u5230 ArrayList\uff1a<\/p>\n
          numbers.add(10);\nnumbers.add(20);\nnumbers.add(30);<\/pre>\n
           \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ul>\n<\/li>\n
        • \n
          \u68c0\u67e5\u6570\u7ec4\u5c01\u88c5\u5927\u5c0f\uff1a<\/strong><\/p>\n
            \n
          • \n
            \u8981\u68c0\u67e5 ArrayList \u4e2d\u5143\u7d20\u7684\u6570\u91cf\uff0c\u8bf7\u4f7f\u7528 size() \u65b9\u6cd5\uff1a<\/p>\n
            int size = numbers.size();<\/pre>\n
             \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
            \u793a\u4f8b\uff1a<\/strong><\/p>\n
            import java.util.ArrayList;\n\npublic class ArrayEncapsulationExample {\n\n    public static void main(String[] args) {\n        ArrayList<String> names = new ArrayList<>();\n\n        \/\/ \u6dfb\u52a0\u5143\u7d20\n        names.add(\"John\");\n        names.add(\"Mary\");\n        names.add(\"Bob\");\n\n        \/\/ \u68c0\u67e5\u6570\u7ec4\u5c01\u88c5\u5927\u5c0f\n        int size = names.size();\n        System.out.println(\"\u6570\u7ec4\u5c01\u88c5\u4e2d\u5143\u7d20\u6570\u91cf\uff1a\" + size);\n    }\n}<\/pre>\n
             \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
            \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u5c01\u88c5\u600e\u4e48\u6dfb\u52a0\u6570\u636e\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 \u6570\u7ec4\u5c01\u88c5\uff08arraylist\uff09\u6dfb\u52a0\u6570\u636e\u7684\u6b65\u9aa4\uff1a\u5bfc\u5165 java.util.arraylist \u7c7b\u521b\u5efa arraylist \u5bf9\u8c61\u4f7f\u7528 add() \u65b9\u6cd5\u6dfb\u52a0\u5143\u7d20\u4f7f\u7528 size() \u65b9\u6cd5\u68c0\u67e5\u6570\u7ec4\u5c01\u88c5\u5927\u5c0f \u5982\u4f55\u5411 Java \u6570\u7ec4\u5c01\u88c5\u4e2d\u6dfb\u52a0\u6570\u636e Java \u4e2d\u7684\u6570\u7ec4\u5c01\u88c5\uff0c\u4e5f\u79f0\u4e3a ArrayList\uff0c\u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u65e8\u5728\u5b58\u50a8\u5bf9\u8c61\u3002\u5b83\u63d0\u4f9b\u4e86\u6bd4\u539f\u59cb Java \u6570\u7ec4\u66f4\u7075\u6d3b\u548c\u65b9\u4fbf\u7684\u65b9\u6cd5\u6765\u7ba1\u7406\u6570\u636e\u3002\u672c\u6587\u5c06\u6307\u5bfc\u60a8\u5982\u4f55\u5411 Java \u6570\u7ec4\u5c01\u88c5\u4e2d\u6dfb\u52a0\u6570\u636e\u3002 \u6b65\u9aa4\uff1a \u5bfc\u5165 ArrayList \u7c7b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u5728\u60a8\u7684\u4ee3\u7801\u4e2d\u5bfc\u5165 java.util.ArrayList \u7c7b\uff1a import java.util.ArrayList; \u767b\u5f55\u540e\u590d\u5236 \u521b\u5efa ArrayList \u5bf9\u8c61\uff1a \u521b\u5efa\u4e00\u4e2a ArrayList \u5bf9\u8c61\u6765\u5b58\u50a8\u60a8\u7684\u6570\u636e\uff1a ArrayList<Integer> numbers = new ArrayList<>(); \u767b\u5f55\u540e\u590d\u5236 \u6dfb\u52a0\u5143\u7d20\uff1a \u4f7f\u7528 add() \u65b9\u6cd5\u5c06\u5143\u7d20\u6dfb\u52a0\u5230 ArrayList\uff1a numbers.add(10); numbers.add(20); numbers.add(30); \u767b\u5f55\u540e\u590d\u5236 \u68c0\u67e5\u6570\u7ec4\u5c01\u88c5\u5927\u5c0f\uff1a \u8981\u68c0\u67e5 ArrayList […]<\/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-65947","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65947","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=65947"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65947\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65947"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65947"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65947"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}