{"id":34649,"date":"2024-11-26T15:32:29","date_gmt":"2024-11-26T07:32:29","guid":{"rendered":"https:\/\/fwq.ai\/blog\/34649\/"},"modified":"2024-11-26T15:32:29","modified_gmt":"2024-11-26T07:32:29","slug":"java%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%95%b0%e7%bb%84%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/34649\/","title":{"rendered":"java\u600e\u4e48\u6dfb\u52a0\u5b57\u7b26\u4e32\u6570\u7ec4\u5143\u7d20"},"content":{"rendered":"

\n java \u4e2d\u6709\u56db\u79cd\u5411\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\uff1a\u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u5668\u3002\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u3002\u4f7f\u7528 arraylist\u3002\u5728 java 9 \u6216\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u4f7f\u7528 list.of() \u65b9\u6cd5\u3002\n<\/p><\/blockquote>\n

\"java\u600e\u4e48\u6dfb\u52a0\u5b57\u7b26\u4e32\u6570\u7ec4\u5143\u7d20\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5411 Java \u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u5b57\u7b26\u4e32\u5143\u7d20\u3002\u8981\u5411\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n

1. \u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u5668<\/strong><\/p>\n

String[] names = {\"John\", \"Mary\", \"Bob\"};<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
2. \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5<\/strong><\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
String[] names = {\"John\", \"Mary\"};\nnames = Arrays.copyOf(names, names.length + 1);\nnames[names.length - 1] = \"Bob\";<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
3. \u4f7f\u7528 ArrayList<\/strong><\/p>\n
\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u66ff\u4ee3\u65b9\u6cd5\u662f\u4f7f\u7528 ArrayList\u3002ArrayList \u662f\u4e00\u79cd\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5927\u5c0f\u4ee5\u9002\u5e94\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002<\/p>\n
ArrayList<String> names = new ArrayList<>();\nnames.add(\"John\");\nnames.add(\"Mary\");\nnames.add(\"Bob\");<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
4. \u4f7f\u7528 List.of() \u65b9\u6cd5\uff08Java 9 \u6216\u66f4\u9ad8\u7248\u672c\uff09<\/strong><\/p>\n
List<String> names = List.of(\"John\", \"Mary\", \"Bob\");<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n
    \n
  • \u5f53\u4f7f\u7528\u5b57\u7b26\u4e32\u6570\u7ec4\u65f6\uff0c\u786e\u4fdd\u7559\u51fa\u8db3\u591f\u7684\u989d\u5916\u7a7a\u95f4\u4ee5\u5bb9\u7eb3\u65b0\u5143\u7d20\u3002<\/li>\n
  • \u5982\u679c\u8fbe\u5230\u6570\u7ec4\u7684\u5bb9\u91cf\uff0c\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u5e76\u590d\u5236\u73b0\u6709\u5143\u7d20\uff0c\u8fd9\u53ef\u80fd\u4f1a\u964d\u4f4e\u6027\u80fd\u3002<\/li>\n
  • \u4f7f\u7528 ArrayList \u65f6\uff0c\u4e0d\u9700\u8981\u62c5\u5fc3\u6570\u7ec4\u5bb9\u91cf\uff0c\u56e0\u4e3a\u5b83\u4f1a\u81ea\u52a8\u7ba1\u7406\u3002<\/li>\n<\/ul>\n
    \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u6dfb\u52a0\u5143\u7d20\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\u56db\u79cd\u5411\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\uff1a\u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u5668\u3002\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u3002\u4f7f\u7528 arraylist\u3002\u5728 java 9 \u6216\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u4f7f\u7528 list.of() \u65b9\u6cd5\u3002 \u5982\u4f55\u5411 Java \u6dfb\u52a0\u5143\u7d20 \u5728 Java \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u5b57\u7b26\u4e32\u5143\u7d20\u3002\u8981\u5411\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a 1. \u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u5668 String[] names = {“John”, “Mary”, “Bob”}; \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b String[] names = {“John”, “Mary”}; names = Arrays.copyOf(names, names.length + 1); names[names.length – 1] = “Bob”; \u767b\u5f55\u540e\u590d\u5236 3. \u4f7f\u7528 ArrayList \u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u66ff\u4ee3\u65b9\u6cd5\u662f\u4f7f\u7528 ArrayList\u3002ArrayList \u662f\u4e00\u79cd\u52a8\u6001\u6570\u7ec4\uff0c\u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5927\u5c0f\u4ee5\u9002\u5e94\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\u3002 ArrayList<String> names […]<\/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-34649","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34649","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=34649"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34649\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=34649"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=34649"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=34649"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}