{"id":66518,"date":"2025-05-03T16:45:11","date_gmt":"2025-05-03T08:45:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66518\/"},"modified":"2025-05-03T16:45:11","modified_gmt":"2025-05-03T08:45:11","slug":"java%e6%80%8e%e4%b9%88%e5%88%9b%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\/66518\/","title":{"rendered":"java\u600e\u4e48\u521b\u5efa\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4"},"content":{"rendered":"

\n \u5982\u4f55\u4f7f\u7528 java \u521b\u5efa\u52a8\u6001\u6570\u7ec4\uff1f\u4f7f\u7528 arraylist \u7c7b\u521b\u5efa\u52a8\u6001\u6570\u7ec4\uff1aarraylist myarraylist = new arraylist()\uff1b\u4f7f\u7528 add() \u65b9\u6cd5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1amyarraylist.add(\u5143\u7d20)\uff1b\u4f7f\u7528 get() \u65b9\u6cd5\u83b7\u53d6\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff1a\u5143\u7d20 myelement = myarraylist.get(\u7d22\u5f15)\uff1b\u4f7f\u7528 remove() \u65b9\u6cd5\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\uff1amyarraylist.remove(\u7d22\u5f15)\uff1b\u4f7f\u7528 size() \u65b9\u6cd5\u83b7\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u521b\u5efa\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u4f7f\u7528 Java \u521b\u5efa\u52a8\u6001\u6570\u7ec4<\/strong><\/p>\n

\u52a8\u6001\u6570\u7ec4\uff0c\u4e5f\u79f0\u4e3a ArrayList\uff0c\u662f\u4e00\u79cd\u53ef\u6839\u636e\u9700\u8981\u8c03\u6574\u5927\u5c0f\u7684\u6570\u7ec4\u3002\u4e0e\u4f20\u7edf\u6570\u7ec4\u4e0d\u540c\uff0c\u52a8\u6001\u6570\u7ec4\u7684\u5927\u5c0f\u4e0d\u662f\u56fa\u5b9a\u7684\uff0c\u5e76\u4e14\u53ef\u4ee5\u6839\u636e\u7a0b\u5e8f\u9700\u6c42\u5b58\u50a8\u4efb\u610f\u6570\u91cf\u7684\u5143\u7d20\u3002<\/p>\n

\u521b\u5efa\u52a8\u6001\u6570\u7ec4<\/strong><\/p>\n

\u8981\u521b\u5efa\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 ArrayList \u7c7b\uff1a<\/p>\n

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

ArrayList<\u7c7b\u578b> myArrayList = new ArrayList<>();<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  •  \u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u7c7b\u578b\uff0c\u4f8b\u5982 String\u3001int \u6216\u81ea\u5b9a\u4e49\u7c7b\u578b\u3002<\/li>\n
  • new ArrayList() \u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7a7a\u52a8\u6001\u6570\u7ec4\u3002<\/li>\n<\/ul>\n
    \u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n
    \u8981\u5411\u52a8\u6001\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 add() \u65b9\u6cd5\uff1a<\/p>\n
    myArrayList.add(\u5143\u7d20);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u83b7\u53d6\u5143\u7d20<\/strong><\/p>\n
    \u8981\u83b7\u53d6\u52a8\u6001\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 get() \u65b9\u6cd5\uff1a<\/p>\n
    \u5143\u7d20 myElement = myArrayList.get(\u7d22\u5f15);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u5176\u4e2d\uff1a<\/p>\n
      \n
    • \u7d22\u5f15 \u8868\u793a\u8981\u83b7\u53d6\u5143\u7d20\u7684\u7d22\u5f15\u3002\u7d22\u5f15\u4ece 0 \u5f00\u59cb\u3002<\/li>\n<\/ul>\n
      \u5220\u9664\u5143\u7d20<\/strong><\/p>\n
      \u8981\u4ece\u52a8\u6001\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 remove() \u65b9\u6cd5\uff1a<\/p>\n
      myArrayList.remove(\u7d22\u5f15);<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u83b7\u53d6\u6570\u7ec4\u5927\u5c0f<\/strong><\/p>\n
      \u8981\u83b7\u53d6\u52a8\u6001\u6570\u7ec4\u7684\u5927\u5c0f\uff0c\u53ef\u4ee5\u4f7f\u7528 size() \u65b9\u6cd5\uff1a<\/p>\n
      int size = myArrayList.size();<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u793a\u4f8b<\/strong><\/p>\n
      \u4ee5\u4e0b\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\u4e86\u5982\u4f55\u521b\u5efa\u548c\u4f7f\u7528\u52a8\u6001\u6570\u7ec4\uff1a<\/p>\n
      ArrayList<String> names = new ArrayList<>();\n\nnames.add(\"Alice\");\nnames.add(\"Bob\");\nnames.add(\"Charlie\");\n\nfor (String name : names) {\n    System.out.println(name);\n}<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u8f93\u51fa\uff1a<\/p>\n
      Alice\nBob\nCharlie<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u521b\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":"
      \u5982\u4f55\u4f7f\u7528 java \u521b\u5efa\u52a8\u6001\u6570\u7ec4\uff1f\u4f7f\u7528 arraylist \u7c7b\u521b\u5efa\u52a8\u6001\u6570\u7ec4\uff1aarraylist myarraylist = new arraylist()\uff1b\u4f7f\u7528 add() \u65b9\u6cd5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1amyarraylist.add(\u5143\u7d20)\uff1b\u4f7f\u7528 get() \u65b9\u6cd5\u83b7\u53d6\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff1a\u5143\u7d20 myelement = myarraylist.get(\u7d22\u5f15)\uff1b\u4f7f\u7528 remove() \u65b9\u6cd5\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\uff1amyarraylist.remove(\u7d22\u5f15)\uff1b\u4f7f\u7528 size() \u65b9\u6cd5\u83b7 \u5982\u4f55\u4f7f\u7528 Java \u521b\u5efa\u52a8\u6001\u6570\u7ec4 \u52a8\u6001\u6570\u7ec4\uff0c\u4e5f\u79f0\u4e3a ArrayList\uff0c\u662f\u4e00\u79cd\u53ef\u6839\u636e\u9700\u8981\u8c03\u6574\u5927\u5c0f\u7684\u6570\u7ec4\u3002\u4e0e\u4f20\u7edf\u6570\u7ec4\u4e0d\u540c\uff0c\u52a8\u6001\u6570\u7ec4\u7684\u5927\u5c0f\u4e0d\u662f\u56fa\u5b9a\u7684\uff0c\u5e76\u4e14\u53ef\u4ee5\u6839\u636e\u7a0b\u5e8f\u9700\u6c42\u5b58\u50a8\u4efb\u610f\u6570\u91cf\u7684\u5143\u7d20\u3002 \u521b\u5efa\u52a8\u6001\u6570\u7ec4 \u8981\u521b\u5efa\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 ArrayList \u7c7b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b ArrayList<\u7c7b\u578b> myArrayList = new ArrayList<>(); \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a \u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u7c7b\u578b\uff0c\u4f8b\u5982 String\u3001int \u6216\u81ea\u5b9a\u4e49\u7c7b\u578b\u3002 new ArrayList() \u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u7a7a\u52a8\u6001\u6570\u7ec4\u3002 \u6dfb\u52a0\u5143\u7d20 \u8981\u5411\u52a8\u6001\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 add() \u65b9\u6cd5\uff1a myArrayList.add(\u5143\u7d20); \u767b\u5f55\u540e\u590d\u5236 \u83b7\u53d6\u5143\u7d20 \u8981\u83b7\u53d6\u52a8\u6001\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 get() \u65b9\u6cd5\uff1a \u5143\u7d20 myElement […]<\/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-66518","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66518","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=66518"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66518\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66518"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66518"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}