{"id":66913,"date":"2025-05-03T11:08:54","date_gmt":"2025-05-03T03:08:54","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66913\/"},"modified":"2025-05-03T11:08:54","modified_gmt":"2025-05-03T03:08:54","slug":"java%e6%80%8e%e4%b9%88%e5%88%9d%e5%a7%8b%e5%8c%96%e4%b8%80%e4%b8%aalist%e6%95%b0%e7%bb%84-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66913\/","title":{"rendered":"java\u600e\u4e48\u521d\u59cb\u5316\u4e00\u4e2alist\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u521d\u59cb\u5316 list \u6570\u7ec4\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u76f4\u63a5\u521d\u59cb\u5316\uff08aslist() \u65b9\u6cd5\u6216 of() \u65b9\u6cd5\uff09\u4f7f\u7528\u6cdb\u578b\uff08\u5e26\u6709\u6cdb\u578b\u7c7b\u578b\u53c2\u6570\u7684 arraylist \u6784\u9020\u51fd\u6570\uff09\u4f7f\u7528\u94bb\u77f3\u8fd0\u7b97\u7b26\uff08\u5e26\u6709\u7c7b\u578b\u63a8\u65ad\u7684 arraylist \u6784\u9020\u51fd\u6570\uff09\u4ece\u73b0\u6709\u96c6\u5408\u521d\u59cb\u5316\uff08arraylist \u6784\u9020\u51fd\u6570\u6216 copy() \u65b9\u6cd5\uff09\u5176\u4ed6\u9009\u9879\uff08\u4f7f\u7528 linkedhashset \u6216 guava \u5e93\uff09\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111718485196209.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u521d\u59cb\u5316\u4e00\u4e2alist\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u600e\u4e48\u521d\u59cb\u5316\u4e00\u4e2alist\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u7528 Java \u521d\u59cb\u5316\u4e00\u4e2a List \u6570\u7ec4<\/strong><\/p>\n<p><strong>\u76f4\u63a5\u521d\u59cb\u5316<\/strong><\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528 java.util.Arrays \u7c7b\u4e2d\u7684 asList() \u65b9\u6cd5\uff1a<\/p>\n<pre>List&lt;String&gt; myList = Arrays.asList(\"a\", \"b\", \"c\");<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<li>\n<p>\u4f7f\u7528 List \u63a5\u53e3\u7684 of() \u65b9\u6cd5\uff08Java 9 \u53ca\u66f4\u9ad8\u7248\u672c\uff09\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>List&lt;String&gt; myList = List.of(\"a\", \"b\", \"c\");<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ul>\n<p><strong>\u4f7f\u7528\u6cdb\u578b<\/strong><\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528\u5e26\u6709\u6cdb\u578b\u7c7b\u578b\u53c2\u6570\u7684 ArrayList \u6784\u9020\u51fd\u6570\uff1a<\/p>\n<pre>ArrayList&lt;String&gt; myList = new ArrayList&lt;&gt;();\nmyList.add(\"a\");\nmyList.add(\"b\");\nmyList.add(\"c\");<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<li>\n<p>\u4f7f\u7528\u5e26\u6709\u7c7b\u578b\u63a8\u65ad\u7684\u94bb\u77f3\u8fd0\u7b97\u7b26\uff08Java 7 \u53ca\u66f4\u9ad8\u7248\u672c\uff09\uff1a<\/p>\n<pre>ArrayList&lt;String&gt; myList = new ArrayList&lt;&gt;() {{\n  add(\"a\");\n  add(\"b\");\n  add(\"c\");\n}};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ul>\n<p><strong>\u4ece\u73b0\u6709\u96c6\u5408\u521d\u59cb\u5316<\/strong><\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528 ArrayList \u6784\u9020\u51fd\u6570\u5e76\u4f20\u9012\u73b0\u6709\u96c6\u5408\uff1a<\/p>\n<pre>List&lt;String&gt; existingList = Arrays.asList(\"a\", \"b\", \"c\");\nArrayList&lt;String&gt; myList = new ArrayList&lt;&gt;(existingList);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<li>\n<p>\u4f7f\u7528 Collections \u7c7b\u7684 copy() \u65b9\u6cd5\uff08Java 10 \u53ca\u66f4\u9ad8\u7248\u672c\uff09\uff1a<\/p>\n<pre>List&lt;String&gt; myList = Collections.copy(existingList);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ul>\n<p><strong>\u5176\u4ed6\u9009\u9879<\/strong><\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528 LinkedHashSet \u521d\u59cb\u5316\u4e00\u4e2a\u6709\u5e8f\u4e14\u4e0d\u542b\u91cd\u590d\u5143\u7d20\u7684\u5217\u8868\uff1a<\/p>\n<pre>List&lt;String&gt; myList = new ArrayList&lt;&gt;(new LinkedHashSet&lt;&gt;(Arrays.asList(\"a\", \"b\", \"c\", \"a\")));<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<li>\n<p>\u4f7f\u7528 Guava \u5e93\u7684 Lists \u7c7b\uff1a<\/p>\n<pre>import com.google.common.collect.Lists;\n\nList&lt;String&gt; myList = Lists.newArrayList(\"a\", \"b\", \"c\");<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u521d\u59cb\u5316\u4e00\u4e2alist\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":"<p>java \u4e2d\u521d\u59cb\u5316 list \u6570\u7ec4\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u76f4\u63a5\u521d\u59cb\u5316\uff08aslist() \u65b9\u6cd5\u6216 of() \u65b9\u6cd5\uff09\u4f7f\u7528\u6cdb\u578b\uff08\u5e26\u6709\u6cdb\u578b\u7c7b\u578b\u53c2\u6570\u7684 arraylist \u6784\u9020\u51fd\u6570\uff09\u4f7f\u7528\u94bb\u77f3\u8fd0\u7b97\u7b26\uff08\u5e26\u6709\u7c7b\u578b\u63a8\u65ad\u7684 arraylist \u6784\u9020\u51fd\u6570\uff09\u4ece\u73b0\u6709\u96c6\u5408\u521d\u59cb\u5316\uff08arraylist \u6784\u9020\u51fd\u6570\u6216 copy() \u65b9\u6cd5\uff09\u5176\u4ed6\u9009\u9879\uff08\u4f7f\u7528 linkedhashset \u6216 guava \u5e93\uff09 \u5982\u4f55\u7528 Java \u521d\u59cb\u5316\u4e00\u4e2a List \u6570\u7ec4 \u76f4\u63a5\u521d\u59cb\u5316 \u4f7f\u7528 java.util.Arrays \u7c7b\u4e2d\u7684 asList() \u65b9\u6cd5\uff1a List&lt;String&gt; myList = Arrays.asList(&#8220;a&#8221;, &#8220;b&#8221;, &#8220;c&#8221;); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 List \u63a5\u53e3\u7684 of() \u65b9\u6cd5\uff08Java 9 \u53ca\u66f4\u9ad8\u7248\u672c\uff09\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b List&lt;String&gt; myList = List.of(&#8220;a&#8221;, &#8220;b&#8221;, &#8220;c&#8221;); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528\u6cdb\u578b \u4f7f\u7528\u5e26\u6709\u6cdb\u578b\u7c7b\u578b\u53c2\u6570\u7684 ArrayList \u6784\u9020\u51fd\u6570\uff1a [&hellip;]<\/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-66913","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66913","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=66913"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66913\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}