{"id":38046,"date":"2024-11-26T08:27:48","date_gmt":"2024-11-26T00:27:48","guid":{"rendered":"https:\/\/fwq.ai\/blog\/38046\/"},"modified":"2024-11-26T08:27:48","modified_gmt":"2024-11-26T00:27:48","slug":"java%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%ae%9a%e4%b9%89%e4%b8%8d%e5%ae%9a%e9%95%bf%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/38046\/","title":{"rendered":"java\u6570\u7ec4\u600e\u4e48\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6"},"content":{"rendered":"

\n java \u4e2d\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u7528\u4e8e\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff1a\u4f7f\u7528 list\u3001\u53ef\u53d8\u53c2\u6570\u3001\u6570\u7ec4\u6269\u5c55\u3002\u4f7f\u7528 list \u662f\u9996\u9009\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u53ef\u6269\u5c55\u4e14\u5141\u8bb8\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\u3002\n<\/p><\/blockquote>\n

\"java\u6570\u7ec4\u600e\u4e48\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u7684 Java \u6570\u7ec4<\/strong><\/p>\n

Java \u4e2d\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n

\u4f7f\u7528 List<\/strong><\/p>\n

List \u662f Java \u4e2d\u7684\u4e00\u4e2a\u63a5\u53e3\uff0c\u5b83\u8868\u793a\u4e00\u4e2a\u6709\u5e8f\u7684\u5143\u7d20\u96c6\u5408\u3002List \u5141\u8bb8\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\uff0c\u5e76\u4e14\u53ef\u4ee5\u52a8\u6001\u8c03\u6574\u5176\u5927\u5c0f\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n

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

List<Integer> numbers = new ArrayList<>();<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4f7f\u7528\u53ef\u53d8\u53c2\u6570<\/strong><\/p>\n
\u53ef\u53d8\u53c2\u6570\u662f Java \u4e2d\u4e00\u79cd\u5141\u8bb8\u51fd\u6570\u63a5\u53d7\u53ef\u53d8\u6570\u91cf\u7684\u53c2\u6570\u7684\u7279\u6b8a\u8bed\u6cd5\u3002\u8981\u4f7f\u7528\u53ef\u53d8\u53c2\u6570\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
int[] numbers = {1, 2, 3, 4, 5};<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cnumbers \u53d8\u91cf\u662f\u4e00\u4e2a\u7c7b\u578b\u4e3a int[] \u7684\u6570\u7ec4\uff0c\u5b83\u7684\u5927\u5c0f\u6839\u636e\u63d0\u4f9b\u7684\u5143\u7d20\u6570\u91cf\u786e\u5b9a\u3002<\/p>\n
\u6570\u7ec4\u6269\u5c55<\/strong><\/p>\n
Java \u4e2d\u7684\u6570\u7ec4\u662f\u56fa\u5b9a\u957f\u5ea6\u7684\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u6765\u6269\u5c55\u6570\u7ec4\u7684\u5927\u5c0f\u3002\u6b64\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u539f\u59cb\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u4ee5\u53ca\u4efb\u4f55\u9644\u52a0\u5143\u7d20\u3002\u8981\u6269\u5c55\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
int[] numbers = {1, 2, 3, 4, 5};\nnumbers = Arrays.copyOf(numbers, numbers.length + 2);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u6b64\u4ee3\u7801\u5c06 numbers \u6570\u7ec4\u7684\u957f\u5ea6\u589e\u52a0\u5230 7\uff0c\u5e76\u5c06\u539f\u59cb\u503c\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\u3002<\/p>\n
\u6ce8\u610f\uff1a<\/strong><\/p>\n
    \n
  • \u4f7f\u7528 List \u662f\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u6570\u7ec4\u7684\u9996\u9009\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u662f\u53ef\u6269\u5c55\u7684\u5e76\u4e14\u5141\u8bb8\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\u3002<\/li>\n
  • \u53ef\u53d8\u53c2\u6570\u5bf9\u4e8e\u5b9a\u4e49\u5e38\u91cf\u6570\u7ec4\uff08\u5373\u4e0d\u4f1a\u66f4\u6539\u5927\u5c0f\u7684\u6570\u7ec4\uff09\u975e\u5e38\u6709\u7528\u3002<\/li>\n
  • \u6570\u7ec4\u6269\u5c55\u662f\u4e00\u79cd\u4e0d\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u9700\u8981\u590d\u5236\u6574\u4e2a\u6570\u7ec4\u3002<\/li>\n<\/ul>\n
    \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u600e\u4e48\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\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 \u4e2d\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u7528\u4e8e\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff1a\u4f7f\u7528 list\u3001\u53ef\u53d8\u53c2\u6570\u3001\u6570\u7ec4\u6269\u5c55\u3002\u4f7f\u7528 list \u662f\u9996\u9009\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u53ef\u6269\u5c55\u4e14\u5141\u8bb8\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\u3002 \u5982\u4f55\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u7684 Java \u6570\u7ec4 Java \u4e2d\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\uff1a \u4f7f\u7528 List List \u662f Java \u4e2d\u7684\u4e00\u4e2a\u63a5\u53e3\uff0c\u5b83\u8868\u793a\u4e00\u4e2a\u6709\u5e8f\u7684\u5143\u7d20\u96c6\u5408\u3002List \u5141\u8bb8\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\uff0c\u5e76\u4e14\u53ef\u4ee5\u52a8\u6001\u8c03\u6574\u5176\u5927\u5c0f\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b List<Integer> numbers = new ArrayList<>(); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528\u53ef\u53d8\u53c2\u6570 \u53ef\u53d8\u53c2\u6570\u662f Java \u4e2d\u4e00\u79cd\u5141\u8bb8\u51fd\u6570\u63a5\u53d7\u53ef\u53d8\u6570\u91cf\u7684\u53c2\u6570\u7684\u7279\u6b8a\u8bed\u6cd5\u3002\u8981\u4f7f\u7528\u53ef\u53d8\u53c2\u6570\u5b9a\u4e49\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a int[] numbers = {1, 2, 3, 4, 5}; \u767b\u5f55\u540e\u590d\u5236 \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cnumbers \u53d8\u91cf\u662f\u4e00\u4e2a\u7c7b\u578b\u4e3a int[] \u7684\u6570\u7ec4\uff0c\u5b83\u7684\u5927\u5c0f\u6839\u636e\u63d0\u4f9b\u7684\u5143\u7d20\u6570\u91cf\u786e\u5b9a\u3002 \u6570\u7ec4\u6269\u5c55 Java \u4e2d\u7684\u6570\u7ec4\u662f\u56fa\u5b9a\u957f\u5ea6\u7684\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u6765\u6269\u5c55\u6570\u7ec4\u7684\u5927\u5c0f\u3002\u6b64\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u539f\u59cb\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u4ee5\u53ca\u4efb\u4f55\u9644\u52a0\u5143\u7d20\u3002\u8981\u6269\u5c55\u4e0d\u5b9a\u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a int[] numbers = {1, 2, 3, 4, 5}; numbers […]<\/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-38046","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38046","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=38046"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38046\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=38046"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=38046"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=38046"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}