{"id":36874,"date":"2024-11-26T09:47:56","date_gmt":"2024-11-26T01:47:56","guid":{"rendered":"https:\/\/fwq.ai\/blog\/36874\/"},"modified":"2024-11-26T09:47:56","modified_gmt":"2024-11-26T01:47:56","slug":"%e5%8a%a8%e6%80%81%e6%95%b0%e7%bb%84java%e6%80%8e%e4%b9%88%e5%86%99","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/36874\/","title":{"rendered":"\u52a8\u6001\u6570\u7ec4java\u600e\u4e48\u5199"},"content":{"rendered":"

\n java \u7684\u52a8\u6001\u6570\u7ec4\uff0c\u79f0\u4e3a arraylist\uff0c\u4f7f\u7528\u5e95\u5c42\u6570\u7ec4\u5e76\u81ea\u52a8\u8c03\u6574\u5176\u5927\u5c0f\u3002\u521b\u5efa arraylist \u540e\uff0c\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u64cd\u4f5c\uff1a\u6dfb\u52a0\u5143\u7d20\uff1alist.add(element)\u83b7\u53d6\u5143\u7d20\uff1aelement = list.get(index)\u5220\u9664\u5143\u7d20\uff1alist.remove(index)\n<\/p><\/blockquote>\n

\"\u52a8\u6001\u6570\u7ec4java\u600e\u4e48\u5199\u63d2\u56fe\"<\/p>\n

\u52a8\u6001\u6570\u7ec4\u7684 Java \u5b9e\u73b0<\/strong><\/p>\n

\u52a8\u6001\u6570\u7ec4\uff0c\u53c8\u79f0\u53ef\u53d8\u5927\u5c0f\u6570\u7ec4\uff0c\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u8c03\u6574\u5176\u5927\u5c0f\u3002\u5728 Java \u4e2d\uff0c\u4f7f\u7528 ArrayList \u7c7b\u6765\u5b9e\u73b0\u52a8\u6001\u6570\u7ec4\u3002<\/p>\n

ArrayList \u7684\u57fa\u672c\u539f\u7406<\/strong><\/p>\n

ArrayList \u4f7f\u7528\u5e95\u5c42\u6570\u7ec4\u6765\u5b58\u50a8\u5143\u7d20\u3002\u5f53\u6570\u7ec4\u5df2\u6ee1\u65f6\uff0c\u5b83\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4\u5e76\u5c06\u5143\u7d20\u590d\u5236\u5230\u5176\u4e2d\uff0c\u4ece\u800c\u5b9e\u73b0\u52a8\u6001\u5927\u5c0f\u8c03\u6574\u3002<\/p>\n

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

\u521b\u5efa ArrayList<\/strong><\/p>\n

import java.util.ArrayList;\n\npublic class Main {\n    public static void main(String[] args) {\n        ArrayList<Integer> list = new ArrayList<>();\n    }\n}<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n
list.add(element);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u83b7\u53d6\u5143\u7d20<\/strong><\/p>\n
element = list.get(index);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5220\u9664\u5143\u7d20<\/strong><\/p>\n
list.remove(index);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4ed6\u65b9\u6cd5<\/strong><\/p>\n
ArrayList \u8fd8\u63d0\u4f9b\u4e86\u5176\u4ed6\u6709\u7528\u7684\u65b9\u6cd5\uff0c\u5982\uff1a<\/p>\n
    \n
  • size()\uff1a\u8fd4\u56de\u5217\u8868\u4e2d\u7684\u5143\u7d20\u6570\u91cf<\/li>\n
  • isEmpty()\uff1a\u68c0\u67e5\u5217\u8868\u662f\u5426\u4e3a\u7a7a<\/li>\n
  • clear()\uff1a\u5220\u9664\u5217\u8868\u4e2d\u7684\u6240\u6709\u5143\u7d20<\/li>\n
  • contns()\uff1a\u68c0\u67e5\u5217\u8868\u4e2d\u662f\u5426\u5305\u542b\u7279\u5b9a\u5143\u7d20<\/li>\n<\/ul>\n
    \u4f18\u52bf<\/strong><\/p>\n
    \u4f7f\u7528 ArrayList \u7684\u4e3b\u8981\u4f18\u52bf\u5305\u62ec\uff1a<\/p>\n
      \n
    • \u52a8\u6001\u5927\u5c0f\u8c03\u6574\uff0c\u65e0\u9700\u624b\u52a8\u7ba1\u7406\u5185\u5b58\u5206\u914d<\/li>\n
    • \u63d0\u4f9b\u4e30\u5bcc\u7684\u64cd\u4f5c\u65b9\u6cd5<\/li>\n
    • \u9002\u7528\u4e8e\u5b58\u50a8\u9700\u8981\u4e0d\u65ad\u589e\u957f\u7684\u96c6\u5408\u7684\u6570\u636e<\/li>\n<\/ul>\n
      \u793a\u4f8b\u4f7f\u7528<\/strong><\/p>\n
      ArrayList<String> names = new ArrayList<>();\nnames.add(\"John\");\nnames.add(\"Jane\");\nnames.add(\"David\");\n\nfor (String name : names) {\n    System.out.println(name);\n}<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4e0a\u8ff0\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u5b58\u50a8\u5b57\u7b26\u4e32\u7684 ArrayList\uff0c\u5e76\u5411\u5176\u4e2d\u6dfb\u52a0\u4e86\u4e09\u4e2a\u5143\u7d20\u3002\u7136\u540e\u904d\u5386\u5217\u8868\u5e76\u6253\u5370\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n
      \u4ee5\u4e0a\u5c31\u662f\u52a8\u6001\u6570\u7ec4java\u600e\u4e48\u5199\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 \u7684\u52a8\u6001\u6570\u7ec4\uff0c\u79f0\u4e3a arraylist\uff0c\u4f7f\u7528\u5e95\u5c42\u6570\u7ec4\u5e76\u81ea\u52a8\u8c03\u6574\u5176\u5927\u5c0f\u3002\u521b\u5efa arraylist \u540e\uff0c\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u64cd\u4f5c\uff1a\u6dfb\u52a0\u5143\u7d20\uff1alist.add(element)\u83b7\u53d6\u5143\u7d20\uff1aelement = list.get(index)\u5220\u9664\u5143\u7d20\uff1alist.remove(index) \u52a8\u6001\u6570\u7ec4\u7684 Java \u5b9e\u73b0 \u52a8\u6001\u6570\u7ec4\uff0c\u53c8\u79f0\u53ef\u53d8\u5927\u5c0f\u6570\u7ec4\uff0c\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u8c03\u6574\u5176\u5927\u5c0f\u3002\u5728 Java \u4e2d\uff0c\u4f7f\u7528 ArrayList \u7c7b\u6765\u5b9e\u73b0\u52a8\u6001\u6570\u7ec4\u3002 ArrayList \u7684\u57fa\u672c\u539f\u7406 ArrayList \u4f7f\u7528\u5e95\u5c42\u6570\u7ec4\u6765\u5b58\u50a8\u5143\u7d20\u3002\u5f53\u6570\u7ec4\u5df2\u6ee1\u65f6\uff0c\u5b83\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u7684\u6570\u7ec4\u5e76\u5c06\u5143\u7d20\u590d\u5236\u5230\u5176\u4e2d\uff0c\u4ece\u800c\u5b9e\u73b0\u52a8\u6001\u5927\u5c0f\u8c03\u6574\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u521b\u5efa ArrayList import java.util.ArrayList; public class Main { public static void main(String[] args) { ArrayList<Integer> list = new ArrayList<>(); } } \u767b\u5f55\u540e\u590d\u5236 \u6dfb\u52a0\u5143\u7d20 list.add(element); \u767b\u5f55\u540e\u590d\u5236 \u83b7\u53d6\u5143\u7d20 element = list.get(index); \u767b\u5f55\u540e\u590d\u5236 \u5220\u9664\u5143\u7d20 list.remove(index); \u767b\u5f55\u540e\u590d\u5236 \u5176\u4ed6\u65b9\u6cd5 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-36874","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36874","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=36874"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/36874\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=36874"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=36874"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=36874"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}