{"id":66596,"date":"2025-05-03T16:36:42","date_gmt":"2025-05-03T08:36:42","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66596\/"},"modified":"2025-05-03T16:36:42","modified_gmt":"2025-05-03T08:36:42","slug":"java%e6%80%8e%e4%b9%88%e5%bb%ba%e4%b8%80%e4%b8%aa%e5%8a%a8%e6%80%81%e6%95%b0%e7%bb%84-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66596\/","title":{"rendered":"java\u600e\u4e48\u5efa\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4"},"content":{"rendered":"

\n java \u4e2d\u7684\u52a8\u6001\u6570\u7ec4\u4f7f\u7528 arraylist \u7c7b\u6784\u5efa\uff0c\u53ef\u53d8\u5927\u5c0f\uff0c\u8fd0\u884c\u65f6\u53ef\u8c03\u6574\uff1a\u5bfc\u5165 arraylist \u7c7b\u521b\u5efa arraylist \u5b9e\u4f8b\u4f7f\u7528 add() \u65b9\u6cd5\u6dfb\u52a0\u5143\u7d20\u4f7f\u7528 get() \u65b9\u6cd5\u83b7\u53d6\u5143\u7d20\u4f7f\u7528 remove() \u65b9\u6cd5\u5220\u9664\u5143\u7d20\u4f7f\u7528 size() \u65b9\u6cd5\u83b7\u53d6\u5927\u5c0f\u4f18\u52bf\uff1a\u6613\u7528\u3001\u53ef\u53d8\u5927\u5c0f\u3001\u53ef\u5b58\u50a8\u5bf9\u8c61\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u5efa\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u4f7f\u7528 Java \u6784\u5efa\u52a8\u6001\u6570\u7ec4\uff1f<\/strong><\/p>\n

Java \u4e2d\u7684\u52a8\u6001\u6570\u7ec4\u662f\u4e00\u4e2a\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u7ec4\uff0c\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u589e\u52a0\u6216\u51cf\u5c11\u5176\u5143\u7d20\u6570\u91cf\u3002\u53ef\u4ee5\u4f7f\u7528 ArrayList \u7c7b\u8f7b\u677e\u6784\u5efa\u52a8\u6001\u6570\u7ec4\u3002<\/p>\n

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

    \n
  1. \u5bfc\u5165 ArrayList \u7c7b\uff1a<\/strong> \u5728\u4f60\u7684\u4ee3\u7801\u4e2d\u5bfc\u5165 java.util.ArrayList \u5305\u3002<\/li>\n<\/ol>\n
    import java.util.ArrayList;<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \n
    1.  \u521b\u5efa ArrayList \u5b9e\u4f8b\uff1a<\/strong> \u4f7f\u7528 new \u5173\u952e\u5b57\u521b\u5efa\u4e00\u4e2a ArrayList \u5b9e\u4f8b\uff0c\u5b83\u5c06\u5b58\u50a8\u4f60\u60f3\u8981\u52a8\u6001\u5b58\u50a8\u7684\u6570\u636e\u7c7b\u578b\u3002<\/li>\n<\/ol>\n
      ArrayList<Integer> numbers = new ArrayList<>();<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \n
      1.  \u6dfb\u52a0\u5143\u7d20\uff1a<\/strong> \u4f7f\u7528 add() \u65b9\u6cd5\u5411\u52a8\u6001\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u3002\u8be5\u65b9\u6cd5\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u7684\u672b\u5c3e\u3002<\/li>\n<\/ol>\n
        numbers.add(10);\nnumbers.add(20);\nnumbers.add(30);<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
          \n
        1.  \u83b7\u53d6\u5143\u7d20\uff1a<\/strong> \u4f7f\u7528 get() \u65b9\u6cd5\u6839\u636e\u7d22\u5f15\u83b7\u53d6\u52a8\u6001\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002<\/li>\n<\/ol>\n
          int firstElement = numbers.get(0); \/\/ \u83b7\u53d6\u7b2c\u4e00\u4e2a\u5143\u7d20<\/pre>\n
           \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
            \n
          1.  \u5220\u9664\u5143\u7d20\uff1a<\/strong> \u4f7f\u7528 remove() \u65b9\u6cd5\u4ece\u52a8\u6001\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\u3002\u8be5\u65b9\u6cd5\u6839\u636e\u7d22\u5f15\u6216\u5143\u7d20\u672c\u8eab\u5220\u9664\u5143\u7d20\u3002<\/li>\n<\/ol>\n
            numbers.remove(0); \/\/ \u6839\u636e\u7d22\u5f15\u5220\u9664\u7b2c\u4e00\u4e2a\u5143\u7d20\nnumbers.remove(Integer.valueOf(30)); \/\/ \u6839\u636e\u5143\u7d20\u672c\u8eab\u5220\u9664\u5143\u7d20<\/pre>\n
             \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
              \n
            1.  \u83b7\u53d6\u6570\u7ec4\u5927\u5c0f\uff1a<\/strong> \u4f7f\u7528 size() \u65b9\u6cd5\u83b7\u53d6\u52a8\u6001\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u6570\u91cf\u3002<\/li>\n<\/ol>\n
              int size = numbers.size();<\/pre>\n
               \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
              \u4f18\u52bf\uff1a<\/strong><\/p>\n
              \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
              \u4f7f\u7528 ArrayList \u6784\u5efa\u52a8\u6001\u6570\u7ec4\u5177\u6709\u4ee5\u4e0b\u4f18\u52bf\uff1a<\/p>\n
                \n
              •  \u6613\u4e8e\u4f7f\u7528\uff1a<\/strong>ArrayList \u63d0\u4f9b\u4e86\u6613\u4e8e\u4f7f\u7528\u7684 API \u8fdb\u884c\u5143\u7d20\u7684\u6dfb\u52a0\u3001\u5220\u9664\u548c\u8bbf\u95ee\u3002<\/li>\n
              •  \u53ef\u53d8\u5927\u5c0f\uff1a<\/strong>\u52a8\u6001\u6570\u7ec4\u7684\u5927\u5c0f\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u8c03\u6574\uff0c\u5141\u8bb8\u4f60\u6839\u636e\u9700\u8981\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002<\/li>\n
              •  \u5b58\u50a8\u5bf9\u8c61\uff1a<\/strong>ArrayList \u53ef\u4ee5\u5b58\u50a8\u4efb\u4f55\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u5305\u62ec\u81ea\u5b9a\u4e49\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n
                \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5efa\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\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\u7684\u52a8\u6001\u6570\u7ec4\u4f7f\u7528 arraylist \u7c7b\u6784\u5efa\uff0c\u53ef\u53d8\u5927\u5c0f\uff0c\u8fd0\u884c\u65f6\u53ef\u8c03\u6574\uff1a\u5bfc\u5165 arraylist \u7c7b\u521b\u5efa arraylist \u5b9e\u4f8b\u4f7f\u7528 add() \u65b9\u6cd5\u6dfb\u52a0\u5143\u7d20\u4f7f\u7528 get() \u65b9\u6cd5\u83b7\u53d6\u5143\u7d20\u4f7f\u7528 remove() \u65b9\u6cd5\u5220\u9664\u5143\u7d20\u4f7f\u7528 size() \u65b9\u6cd5\u83b7\u53d6\u5927\u5c0f\u4f18\u52bf\uff1a\u6613\u7528\u3001\u53ef\u53d8\u5927\u5c0f\u3001\u53ef\u5b58\u50a8\u5bf9\u8c61 \u5982\u4f55\u4f7f\u7528 Java \u6784\u5efa\u52a8\u6001\u6570\u7ec4\uff1f Java \u4e2d\u7684\u52a8\u6001\u6570\u7ec4\u662f\u4e00\u4e2a\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u7ec4\uff0c\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u589e\u52a0\u6216\u51cf\u5c11\u5176\u5143\u7d20\u6570\u91cf\u3002\u53ef\u4ee5\u4f7f\u7528 ArrayList \u7c7b\u8f7b\u677e\u6784\u5efa\u52a8\u6001\u6570\u7ec4\u3002 \u6b65\u9aa4\uff1a \u5bfc\u5165 ArrayList \u7c7b\uff1a \u5728\u4f60\u7684\u4ee3\u7801\u4e2d\u5bfc\u5165 java.util.ArrayList \u5305\u3002 import java.util.ArrayList; \u767b\u5f55\u540e\u590d\u5236 \u521b\u5efa ArrayList \u5b9e\u4f8b\uff1a \u4f7f\u7528 new \u5173\u952e\u5b57\u521b\u5efa\u4e00\u4e2a ArrayList \u5b9e\u4f8b\uff0c\u5b83\u5c06\u5b58\u50a8\u4f60\u60f3\u8981\u52a8\u6001\u5b58\u50a8\u7684\u6570\u636e\u7c7b\u578b\u3002 ArrayList<Integer> numbers = new ArrayList<>(); \u767b\u5f55\u540e\u590d\u5236 \u6dfb\u52a0\u5143\u7d20\uff1a \u4f7f\u7528 add() \u65b9\u6cd5\u5411\u52a8\u6001\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\u3002\u8be5\u65b9\u6cd5\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u7684\u672b\u5c3e\u3002 numbers.add(10); numbers.add(20); numbers.add(30); \u767b\u5f55\u540e\u590d\u5236 […]<\/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-66596","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66596","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=66596"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66596\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}