{"id":39338,"date":"2024-11-26T13:40:45","date_gmt":"2024-11-26T05:40:45","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39338\/"},"modified":"2024-11-26T13:40:45","modified_gmt":"2024-11-26T05:40:45","slug":"java%e6%80%8e%e4%b9%88%e5%ae%9a%e4%b9%89%e4%b8%80%e4%b8%aa%e5%8a%a8%e6%80%81%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39338\/","title":{"rendered":"java\u600e\u4e48\u5b9a\u4e49\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4"},"content":{"rendered":"

\n \u5728 java \u4e2d\u5b9a\u4e49\u52a8\u6001\u6570\u7ec4\uff08arraylist\uff09\uff1a\u5bfc\u5165 java.util.arraylist\u3002\u521b\u5efa arraylist \u5bf9\u8c61\uff1aarraylist arraylistname = new arraylist()\u3002\u4f7f\u7528 add() \u6dfb\u52a0\u5143\u7d20\uff0cremove() \u5220\u9664\u5143\u7d20\uff0cset() \u4fee\u6539\u5143\u7d20\uff0cclear() \u6e05\u7a7a\u6570\u7ec4\uff0csize() \u83b7\u53d6\u5927\u5c0f\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u5b9a\u4e49\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u63d2\u56fe\"<\/p>\n

Java \u4e2d\u5982\u4f55\u5b9a\u4e49\u52a8\u6001\u6570\u7ec4<\/strong><\/p>\n

\u52a8\u6001\u6570\u7ec4\uff0c\u4e5f\u79f0\u4e3a ArrayList\uff0c\u662f Java \u4e2d\u4e00\u79cd\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u7ec4\u3002\u5b83\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\uff0c\u65e0\u9700\u624b\u52a8\u8c03\u6574\u6570\u7ec4\u5927\u5c0f\u3002<\/p>\n

\u5728 Java \u4e2d\u5b9a\u4e49\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n

    \n
  1. \n

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

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

    import java.util.ArrayList;<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/li>\n
  2. \n
    \u521b\u5efa ArrayList \u5bf9\u8c61\uff1a<\/strong><\/p>\n
    ArrayList<\u6570\u636e\u7c7b\u578b> arrayListName = new ArrayList<>();<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u5176\u4e2d \u6570\u636e\u7c7b\u578b \u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<\/li>\n<\/ol>\n
    \u4f8b\u5982\uff0c\u521b\u5efa\u4e00\u4e2a\u5b58\u50a8\u5b57\u7b26\u4e32\u7684\u52a8\u6001\u6570\u7ec4\uff1a<\/strong><\/p>\n
    ArrayList<String> names = new ArrayList<>();<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u5e38\u89c1\u65b9\u6cd5\uff1a<\/strong><\/p>\n
      \n
    •  add(E element)\uff1a<\/strong>\u6dfb\u52a0\u5143\u7d20\u5230\u6570\u7ec4\u672b\u5c3e\u3002<\/li>\n
    •  remove(int index)\uff1a<\/strong>\u6839\u636e\u7d22\u5f15\u5220\u9664\u5143\u7d20\u3002<\/li>\n
    •  set(int index, E element)\uff1a<\/strong>\u6839\u636e\u7d22\u5f15\u4fee\u6539\u5143\u7d20\u3002<\/li>\n
    •  clear()\uff1a<\/strong>\u6e05\u7a7a\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002<\/li>\n
    •  size()\uff1a<\/strong>\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002<\/li>\n<\/ul>\n
      \u4f18\u70b9\uff1a<\/strong><\/p>\n
        \n
      • \u53ef\u53d8\u5927\u5c0f\uff0c\u65e0\u9700\u624b\u52a8\u8c03\u6574\u6570\u7ec4\u5927\u5c0f\u3002<\/li>\n
      • \u6613\u4e8e\u4f7f\u7528\uff0c\u652f\u6301\u5e38\u89c1\u7684\u96c6\u5408\u64cd\u4f5c\u3002<\/li>\n
      • \u5b58\u50a8\u5404\u79cd\u6570\u636e\u7c7b\u578b\u7684\u6570\u636e\u3002<\/li>\n<\/ul>\n
        \u793a\u4f8b\uff1a<\/strong><\/p>\n
        \/\/ \u521b\u5efa\u4e00\u4e2a\u5b57\u7b26\u4e32\u52a8\u6001\u6570\u7ec4\nArrayList<String> names = new ArrayList<>();\n\n\/\/ \u6dfb\u52a0\u4e00\u4e9b\u540d\u79f0\nnames.add(\"Alice\");\nnames.add(\"Bob\");\nnames.add(\"Charlie\");\n\n\/\/ \u6253\u5370\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u540d\u79f0\nfor (String name : names) {\n    System.out.println(name);\n}\n\n\/\/ \u5220\u9664\u7d22\u5f15\u4e3a 1 \u7684\u5143\u7d20\nnames.remove(1);\n\n\/\/ \u4fee\u6539\u7d22\u5f15\u4e3a 0 \u7684\u5143\u7d20\nnames.set(0, \"Alice Smith\");\n\n\/\/ \u6253\u5370\u66f4\u65b0\u540e\u7684\u6570\u7ec4\nSystem.out.println(names);<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \u8f93\u51fa\uff1a<\/p>\n
        Alice\nBob\nCharlie\n[Alice Smith, Charlie]<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5b9a\u4e49\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\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":"
        \u5728 java \u4e2d\u5b9a\u4e49\u52a8\u6001\u6570\u7ec4\uff08arraylist\uff09\uff1a\u5bfc\u5165 java.util.arraylist\u3002\u521b\u5efa arraylist \u5bf9\u8c61\uff1aarraylist arraylistname = new arraylist()\u3002\u4f7f\u7528 add() \u6dfb\u52a0\u5143\u7d20\uff0cremove() \u5220\u9664\u5143\u7d20\uff0cset() \u4fee\u6539\u5143\u7d20\uff0cclear() \u6e05\u7a7a\u6570\u7ec4\uff0csize() \u83b7\u53d6\u5927\u5c0f\u3002 Java \u4e2d\u5982\u4f55\u5b9a\u4e49\u52a8\u6001\u6570\u7ec4 \u52a8\u6001\u6570\u7ec4\uff0c\u4e5f\u79f0\u4e3a ArrayList\uff0c\u662f Java \u4e2d\u4e00\u79cd\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u7ec4\u3002\u5b83\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\uff0c\u65e0\u9700\u624b\u52a8\u8c03\u6574\u6570\u7ec4\u5927\u5c0f\u3002 \u5728 Java \u4e2d\u5b9a\u4e49\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a \u5bfc\u5165 ArrayList \u7c7b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b import java.util.ArrayList; \u767b\u5f55\u540e\u590d\u5236 \u521b\u5efa ArrayList \u5bf9\u8c61\uff1a ArrayList<\u6570\u636e\u7c7b\u578b> arrayListName = new ArrayList<>(); \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d \u6570\u636e\u7c7b\u578b \u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\u3002 \u4f8b\u5982\uff0c\u521b\u5efa\u4e00\u4e2a\u5b58\u50a8\u5b57\u7b26\u4e32\u7684\u52a8\u6001\u6570\u7ec4\uff1a ArrayList<String> names = new ArrayList<>(); \u767b\u5f55\u540e\u590d\u5236 \u5e38\u89c1\u65b9\u6cd5\uff1a add(E element)\uff1a\u6dfb\u52a0\u5143\u7d20\u5230\u6570\u7ec4\u672b\u5c3e\u3002 remove(int […]<\/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-39338","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39338","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=39338"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39338\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}