{"id":37980,"date":"2024-11-26T08:05:24","date_gmt":"2024-11-26T00:05:24","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37980\/"},"modified":"2024-11-26T08:05:24","modified_gmt":"2024-11-26T00:05:24","slug":"java%e6%95%b0%e7%bb%84%e5%88%97%e8%a1%a8%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e5%af%b9%e8%b1%a1","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37980\/","title":{"rendered":"java\u6570\u7ec4\u5217\u8868\u600e\u4e48\u6dfb\u52a0\u5bf9\u8c61"},"content":{"rendered":"

\n java \u6570\u7ec4\u5217\u8868\u63d0\u4f9b\u4e86\u4e94\u79cd\u6dfb\u52a0\u5bf9\u8c61\u7684\u65b9\u6cd5\uff1a1. add(object o) \u6dfb\u52a0\u5230\u672b\u5c3e\uff1b2. add(int index, object o) \u63d2\u5165\u5230\u6307\u5b9a\u7d22\u5f15\uff1b3. addall(collection\n<\/p><\/blockquote>\n

\"java\u6570\u7ec4\u5217\u8868\u600e\u4e48\u6dfb\u52a0\u5bf9\u8c61\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u5728 Java \u6570\u7ec4\u5217\u8868\u4e2d\u6dfb\u52a0\u5bf9\u8c61<\/strong><\/p>\n

\u65b9\u6cd5\uff1a<\/strong><\/p>\n

Java \u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u5728\u6570\u7ec4\u5217\u8868\u4e2d\u6dfb\u52a0\u5bf9\u8c61\uff1a<\/p>\n

1. add(Object o)<\/strong><\/p>\n

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

\u6b64\u65b9\u6cd5\u5728\u5217\u8868\u672b\u5c3e\u6dfb\u52a0\u6307\u5b9a\u5bf9\u8c61\u3002<\/p>\n

\u793a\u4f8b\uff1a<\/p>\n

List<String> names = new ArrayList<>();\nnames.add(\"Alice\");<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
2. add(int index, Object o)<\/strong><\/p>\n
\u6b64\u65b9\u6cd5\u5c06\u6307\u5b9a\u5bf9\u8c61\u63d2\u5165\u5230\u6307\u5b9a\u7d22\u5f15\u4f4d\u7f6e\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n
List<Integer> numbers = new ArrayList<>();\nnumbers.add(0, 10); \/\/ \u5728\u7d22\u5f15 0 \u5904\u6dfb\u52a0\u503c 10<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
3. addAll(Collection extends E> c)<\/strong><\/p>\n
\u6b64\u65b9\u6cd5\u5c06\u6307\u5b9a\u96c6\u5408\u7684\u6240\u6709\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u672b\u5c3e\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n
List<String> fruits = new ArrayList<>();\nfruits.addAll(Arrays.asList(\"Apple\", \"Banana\", \"Orange\"));<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
4. Collections.addAll(List list, T… elements) <\/strong><\/p>\n
\u6b64\u65b9\u6cd5\u4f7f\u7528\u9759\u6001 Collections \u5b9e\u7528\u7a0b\u5e8f\u7c7b\uff0c\u5c06\u6307\u5b9a\u53ef\u53d8\u6570\u91cf\u7684\u5bf9\u8c61\u6dfb\u52a0\u5230\u5217\u8868\u672b\u5c3e\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n
List<String> colors = new ArrayList<>();\nCollections.addAll(colors, \"Red\", \"Green\", \"Blue\");<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
5. stream().forEach(list::add)<\/strong><\/p>\n
\u6b64\u65b9\u6cd5\u4f7f\u7528 Stream API\uff0c\u5c06\u6307\u5b9a Stream \u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u4e2d\u3002<\/p>\n
\u793a\u4f8b\uff1a<\/p>\n
List<Integer> evenNumbers = new ArrayList<>();\nIntStream.range(0, 10).filter(n -> n % 2 == 0).forEach(evenNumbers::add);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u5217\u8868\u600e\u4e48\u6dfb\u52a0\u5bf9\u8c61\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 \u6570\u7ec4\u5217\u8868\u63d0\u4f9b\u4e86\u4e94\u79cd\u6dfb\u52a0\u5bf9\u8c61\u7684\u65b9\u6cd5\uff1a1. add(object o) \u6dfb\u52a0\u5230\u672b\u5c3e\uff1b2. add(int index, object o) \u63d2\u5165\u5230\u6307\u5b9a\u7d22\u5f15\uff1b3. addall(collection \u5982\u4f55\u5728 Java \u6570\u7ec4\u5217\u8868\u4e2d\u6dfb\u52a0\u5bf9\u8c61 \u65b9\u6cd5\uff1a Java \u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u5728\u6570\u7ec4\u5217\u8868\u4e2d\u6dfb\u52a0\u5bf9\u8c61\uff1a 1. add(Object o) \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u6b64\u65b9\u6cd5\u5728\u5217\u8868\u672b\u5c3e\u6dfb\u52a0\u6307\u5b9a\u5bf9\u8c61\u3002 \u793a\u4f8b\uff1a List<String> names = new ArrayList<>(); names.add(“Alice”); \u767b\u5f55\u540e\u590d\u5236 2. add(int index, Object o) \u6b64\u65b9\u6cd5\u5c06\u6307\u5b9a\u5bf9\u8c61\u63d2\u5165\u5230\u6307\u5b9a\u7d22\u5f15\u4f4d\u7f6e\u3002 \u793a\u4f8b\uff1a List<Integer> numbers = new ArrayList<>(); numbers.add(0, 10); \/\/ \u5728\u7d22\u5f15 0 \u5904\u6dfb\u52a0\u503c 10 \u767b\u5f55\u540e\u590d\u5236 3. addAll(Collection extends E> c) […]<\/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-37980","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37980","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=37980"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37980\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}