{"id":65237,"date":"2025-05-03T09:04:08","date_gmt":"2025-05-03T01:04:08","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65237\/"},"modified":"2025-05-03T09:04:08","modified_gmt":"2025-05-03T01:04:08","slug":"java%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e6%89%a9%e5%ae%b9-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65237\/","title":{"rendered":"java\u6570\u7ec4\u600e\u4e48\u6269\u5bb9"},"content":{"rendered":"

\n java\u6570\u7ec4\u6269\u5bb9\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\u548c\u4f7f\u7528arraylist\u3002\u521b\u5efa\u65b0\u6570\u7ec4\u66f4\u6709\u6548\u7387\uff0c\u4f46\u7f3a\u4e4f\u7075\u6d3b\u6027\uff1barraylist\u66f4\u7075\u6d3b\uff0c\u4f46\u6548\u7387\u8f83\u4f4e\u3002\u6700\u4f73\u5b9e\u8df5\u662f\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u65b9\u6cd5\uff1a\u9700\u8981\u786e\u5207\u5bb9\u91cf\u4e14\u66f4\u65b0\u9891\u7387\u8f83\u4f4e\u65f6\uff0c\u4f7f\u7528\u521b\u5efa\u65b0\u6570\u7ec4\uff1b\u9700\u8981\u52a8\u6001\u5bb9\u91cf\u4e14\u66f4\u65b0\u9891\u7387\u8f83\u9ad8\u65f6\uff0c\u4f7f\u7528arraylist\u3002\n<\/p><\/blockquote>\n

\"java\u6570\u7ec4\u600e\u4e48\u6269\u5bb9\u63d2\u56fe\"<\/p>\n

Java\u6570\u7ec4\u6269\u5bb9\u65b9\u6cd5<\/strong><\/p>\n

Java\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u6539\u53d8\u5176\u957f\u5ea6\u3002\u4f46\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u6765\u6269\u5c55Java\u6570\u7ec4\uff1a<\/p>\n

1. \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4<\/strong>
\u8fd9\u662f\u6269\u5bb9Java\u6570\u7ec4\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u3002\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u5bb9\u91cf\u7684\u65b0\u6570\u7ec4\uff0c\u5e76\u5c06\u65e7\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002\u4f8b\u5982\uff1a<\/p>\n

int[] oldArray = {1, 2, 3, 4, 5};\nint[] newArray = new int[oldArray.length + 10];\nSystem.arraycopy(oldArray, 0, newArray, 0, oldArray.length);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
2. \u4f7f\u7528ArrayList<\/strong>
ArrayList\u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5141\u8bb8\u6211\u4eec\u7075\u6d3b\u5730\u589e\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002\u8981\u5c06Java\u6570\u7ec4\u8f6c\u6362\u4e3aArrayList\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
ArrayList<Integer> arrayList = new ArrayList<>(Arrays.asList(oldArray));<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528add()\u65b9\u6cd5\u5411ArrayList\u4e2d\u6dfb\u52a0\u5143\u7d20\uff0c\u6216\u4f7f\u7528remove()\u65b9\u6cd5\u5220\u9664\u5143\u7d20\u3002\u4f8b\u5982\uff1a<\/p>\n
arrayList.add(6);\narrayList.remove(0);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u6bd4\u8f83\u4e24\u79cd\u65b9\u6cd5<\/strong><\/p>\n
    \n
  •  \u6548\u7387\uff1a<\/strong>\u521b\u5efa\u65b0\u6570\u7ec4\u6bd4\u4f7f\u7528ArrayList\u66f4\u6709\u6548\u7387\uff0c\u56e0\u4e3aArrayList\u9700\u8981\u989d\u5916\u7684\u5f00\u9500\u6765\u7ba1\u7406\u5176\u5185\u90e8\u6570\u636e\u7ed3\u6784\u3002<\/li>\n
  •  \u7075\u6d3b\u6027\uff1a<\/strong>ArrayList\u6bd4\u521b\u5efa\u65b0\u6570\u7ec4\u66f4\u7075\u6d3b\uff0c\u56e0\u4e3a\u5b83\u5141\u8bb8\u6211\u4eec\u52a8\u6001\u5730\u589e\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002<\/li>\n
  •  \u5bb9\u91cf\uff1a<\/strong>\u521b\u5efa\u65b0\u6570\u7ec4\u53ef\u4ee5\u4e3a\u6570\u7ec4\u521b\u5efa\u4e00\u4e2a\u786e\u5207\u7684\u5bb9\u91cf\uff0c\u800cArrayList\u7684\u5bb9\u91cf\u4f1a\u6839\u636e\u9700\u8981\u800c\u81ea\u52a8\u589e\u957f\u3002<\/li>\n<\/ul>\n
    \u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n
    \u5728\u9009\u62e9\u6269\u5bb9Java\u6570\u7ec4\u7684\u65b9\u6cd5\u65f6\uff0c\u5e94\u8003\u8651\u4ee5\u4e0b\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n
      \n
    • \u5982\u679c\u9700\u8981\u786e\u5207\u7684\u5bb9\u91cf\uff0c\u5e76\u4e14\u4e0d\u4f1a\u9891\u7e41\u5730\u66f4\u65b0\u6570\u7ec4\uff0c\u5219\u4f7f\u7528\u521b\u5efa\u65b0\u6570\u7ec4\u7684\u65b9\u6cd5\u3002<\/li>\n
    • \u5982\u679c\u9700\u8981\u52a8\u6001\u5bb9\u91cf\u5e76\u4e14\u53ef\u80fd\u7ecf\u5e38\u66f4\u65b0\u6570\u7ec4\uff0c\u5219\u4f7f\u7528ArrayList\u3002<\/li>\n
    • \u907f\u514d\u9891\u7e41\u5730\u4f7f\u7528\u6269\u5bb9\u64cd\u4f5c\uff0c\u56e0\u4e3a\u5b83\u4f1a\u5f71\u54cd\u6027\u80fd\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u6269\u5bb9\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\u6269\u5bb9\u6709\u4e24\u79cd\u65b9\u6cd5\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\u548c\u4f7f\u7528arraylist\u3002\u521b\u5efa\u65b0\u6570\u7ec4\u66f4\u6709\u6548\u7387\uff0c\u4f46\u7f3a\u4e4f\u7075\u6d3b\u6027\uff1barraylist\u66f4\u7075\u6d3b\uff0c\u4f46\u6548\u7387\u8f83\u4f4e\u3002\u6700\u4f73\u5b9e\u8df5\u662f\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u65b9\u6cd5\uff1a\u9700\u8981\u786e\u5207\u5bb9\u91cf\u4e14\u66f4\u65b0\u9891\u7387\u8f83\u4f4e\u65f6\uff0c\u4f7f\u7528\u521b\u5efa\u65b0\u6570\u7ec4\uff1b\u9700\u8981\u52a8\u6001\u5bb9\u91cf\u4e14\u66f4\u65b0\u9891\u7387\u8f83\u9ad8\u65f6\uff0c\u4f7f\u7528arraylist\u3002 Java\u6570\u7ec4\u6269\u5bb9\u65b9\u6cd5 Java\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u6539\u53d8\u5176\u957f\u5ea6\u3002\u4f46\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u6765\u6269\u5c55Java\u6570\u7ec4\uff1a 1. \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u8fd9\u662f\u6269\u5bb9Java\u6570\u7ec4\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u3002\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u66f4\u5927\u5bb9\u91cf\u7684\u65b0\u6570\u7ec4\uff0c\u5e76\u5c06\u65e7\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002\u4f8b\u5982\uff1a int[] oldArray = {1, 2, 3, 4, 5}; int[] newArray = new int[oldArray.length + 10]; System.arraycopy(oldArray, 0, newArray, 0, oldArray.length); \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528ArrayListArrayList\u662f\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5141\u8bb8\u6211\u4eec\u7075\u6d3b\u5730\u589e\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002\u8981\u5c06Java\u6570\u7ec4\u8f6c\u6362\u4e3aArrayList\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b ArrayList<Integer> arrayList = new ArrayList<>(Arrays.asList(oldArray)); \u767b\u5f55\u540e\u590d\u5236 \u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528add()\u65b9\u6cd5\u5411ArrayList\u4e2d\u6dfb\u52a0\u5143\u7d20\uff0c\u6216\u4f7f\u7528remove()\u65b9\u6cd5\u5220\u9664\u5143\u7d20\u3002\u4f8b\u5982\uff1a arrayList.add(6); arrayList.remove(0); \u767b\u5f55\u540e\u590d\u5236 \u6bd4\u8f83\u4e24\u79cd\u65b9\u6cd5 \u6548\u7387\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\u6bd4\u4f7f\u7528ArrayList\u66f4\u6709\u6548\u7387\uff0c\u56e0\u4e3aArrayList\u9700\u8981\u989d\u5916\u7684\u5f00\u9500\u6765\u7ba1\u7406\u5176\u5185\u90e8\u6570\u636e\u7ed3\u6784\u3002 \u7075\u6d3b\u6027\uff1aArrayList\u6bd4\u521b\u5efa\u65b0\u6570\u7ec4\u66f4\u7075\u6d3b\uff0c\u56e0\u4e3a\u5b83\u5141\u8bb8\u6211\u4eec\u52a8\u6001\u5730\u589e\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002 \u5bb9\u91cf\uff1a\u521b\u5efa\u65b0\u6570\u7ec4\u53ef\u4ee5\u4e3a\u6570\u7ec4\u521b\u5efa\u4e00\u4e2a\u786e\u5207\u7684\u5bb9\u91cf\uff0c\u800cArrayList\u7684\u5bb9\u91cf\u4f1a\u6839\u636e\u9700\u8981\u800c\u81ea\u52a8\u589e\u957f\u3002 \u6700\u4f73\u5b9e\u8df5 \u5728\u9009\u62e9\u6269\u5bb9Java\u6570\u7ec4\u7684\u65b9\u6cd5\u65f6\uff0c\u5e94\u8003\u8651\u4ee5\u4e0b\u6700\u4f73\u5b9e\u8df5\uff1a \u5982\u679c\u9700\u8981\u786e\u5207\u7684\u5bb9\u91cf\uff0c\u5e76\u4e14\u4e0d\u4f1a\u9891\u7e41\u5730\u66f4\u65b0\u6570\u7ec4\uff0c\u5219\u4f7f\u7528\u521b\u5efa\u65b0\u6570\u7ec4\u7684\u65b9\u6cd5\u3002 \u5982\u679c\u9700\u8981\u52a8\u6001\u5bb9\u91cf\u5e76\u4e14\u53ef\u80fd\u7ecf\u5e38\u66f4\u65b0\u6570\u7ec4\uff0c\u5219\u4f7f\u7528ArrayList\u3002 \u907f\u514d\u9891\u7e41\u5730\u4f7f\u7528\u6269\u5bb9\u64cd\u4f5c\uff0c\u56e0\u4e3a\u5b83\u4f1a\u5f71\u54cd\u6027\u80fd\u3002 \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u6269\u5bb9\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/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-65237","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65237","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=65237"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65237\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}