{"id":66014,"date":"2025-05-03T13:38:58","date_gmt":"2025-05-03T05:38:58","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66014\/"},"modified":"2025-05-03T13:38:58","modified_gmt":"2025-05-03T05:38:58","slug":"java%e6%80%8e%e4%b9%88%e7%bb%99%e6%95%b0%e7%bb%84%e5%8a%a0%e5%85%a5%e6%96%b0%e5%80%bc-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66014\/","title":{"rendered":"java\u600e\u4e48\u7ed9\u6570\u7ec4\u52a0\u5165\u65b0\u503c"},"content":{"rendered":"<blockquote><p>\n  \u65e0\u6cd5\u76f4\u63a5\u5411 java \u6570\u7ec4\u6dfb\u52a0\u65b0\u503c\uff0c\u56e0\u4e3a\u5176\u957f\u5ea6\u4e0d\u53ef\u53d8\u3002\u53d6\u800c\u4ee3\u4e4b\u7684\u662f\uff0c\u6709\u4ee5\u4e0b\u65b9\u6cd5\uff1a1. \u4f7f\u7528 arraylist\uff1b2. \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\uff1b3. \u590d\u5236\u6570\u7ec4\u5230\u65b0\u6570\u7ec4\uff1b4. \u4f7f\u7528 guava \u5e93\uff08\u53ef\u9009\uff09\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/14\/2024111411125989107.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u7ed9\u6570\u7ec4\u52a0\u5165\u65b0\u503c\u63d2\u56fe\" alt=\"java\u600e\u4e48\u7ed9\u6570\u7ec4\u52a0\u5165\u65b0\u503c\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5411 Java \u6570\u7ec4\u6dfb\u52a0\u65b0\u503c<\/strong><\/p>\n<p>Java \u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u65e0\u6cd5\u6539\u53d8\u5176\u957f\u5ea6\u3002\u56e0\u6b64\uff0c\u65e0\u6cd5\u76f4\u63a5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u65b0\u503c\u3002\u4f46\u662f\uff0c\u6709\u4ee5\u4e0b\u65b9\u6cd5\u53ef\u4ee5\u89e3\u51b3\u6b64\u95ee\u9898\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 ArrayList<\/strong><\/p>\n<p>ArrayList \u662f Java \u4e2d\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5b83\u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5176\u5927\u5c0f\u4ee5\u5bb9\u7eb3\u65b0\u5143\u7d20\u3002\u8981\u5411 ArrayList \u6dfb\u52a0\u65b0\u503c\uff0c\u8bf7\u4f7f\u7528 add() \u65b9\u6cd5\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>import java.util.ArrayList;\n\npublic class Main {\n    public static void main(String[] args) {\n        ArrayList&lt;Integer&gt; numbers = new ArrayList&lt;&gt;();\n        numbers.add(1);\n        numbers.add(2);\n        numbers.add(3);\n    }\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\u518d\u6dfb\u52a0\u503c<\/strong><\/p>\n<p>\u60a8\u53ef\u4ee5\u5c06\u73b0\u6709\u7684\u6570\u7ec4\u8f6c\u6362\u4e3a ArrayList\uff0c\u7136\u540e\u4f7f\u7528 add() \u65b9\u6cd5\u5411\u5176\u6dfb\u52a0\u65b0\u503c\uff1a<\/p>\n<pre>int[] arr = {1, 2, 3};\nList&lt;Integer&gt; list = Arrays.asList(arr);\nlist.add(4);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u590d\u5236\u6570\u7ec4\u5230\u65b0\u6570\u7ec4<\/strong><\/p>\n<p>\u60a8\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u957f\u5ea6\u6bd4\u73b0\u6709\u6570\u7ec4\u957f\uff0c\u5e76\u4f7f\u7528 arraycopy() \u65b9\u6cd5\u5c06\u73b0\u6709\u6570\u7ec4\u7684\u5185\u5bb9\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\uff1a<\/p>\n<pre>int[] arr = {1, 2, 3};\nint[] newArr = new int[arr.length + 1];\nSystem.arraycopy(arr, 0, newArr, 0, arr.length);\nnewArr[newArr.length - 1] = 4;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>4. \u4f7f\u7528 Guava \u5e93\uff08\u53ef\u9009\uff09<\/strong><\/p>\n<p>Guava \u5e93\u63d0\u4f9b\u4e86\u4e00\u4e2a Lists \u7c7b\uff0c\u5b83\u5305\u542b\u4e00\u4e2a newArrayList() \u65b9\u6cd5\uff0c\u53ef\u4ee5\u521b\u5efa\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u7ec4\u3002<\/p>\n<pre>import com.google.common.collect.Lists;\n\nint[] arr = {1, 2, 3};\nList&lt;Integer&gt; list = Lists.newArrayList(arr);\nlist.add(4);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u7ed9\u6570\u7ec4\u52a0\u5165\u65b0\u503c\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>\u65e0\u6cd5\u76f4\u63a5\u5411 java \u6570\u7ec4\u6dfb\u52a0\u65b0\u503c\uff0c\u56e0\u4e3a\u5176\u957f\u5ea6\u4e0d\u53ef\u53d8\u3002\u53d6\u800c\u4ee3\u4e4b\u7684\u662f\uff0c\u6709\u4ee5\u4e0b\u65b9\u6cd5\uff1a1. \u4f7f\u7528 arraylist\uff1b2. \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\uff1b3. \u590d\u5236\u6570\u7ec4\u5230\u65b0\u6570\u7ec4\uff1b4. \u4f7f\u7528 guava \u5e93\uff08\u53ef\u9009\uff09\u3002 \u5982\u4f55\u5411 Java \u6570\u7ec4\u6dfb\u52a0\u65b0\u503c Java \u4e2d\u7684\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u65e0\u6cd5\u6539\u53d8\u5176\u957f\u5ea6\u3002\u56e0\u6b64\uff0c\u65e0\u6cd5\u76f4\u63a5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u65b0\u503c\u3002\u4f46\u662f\uff0c\u6709\u4ee5\u4e0b\u65b9\u6cd5\u53ef\u4ee5\u89e3\u51b3\u6b64\u95ee\u9898\uff1a 1. \u4f7f\u7528 ArrayList ArrayList \u662f Java \u4e2d\u4e00\u4e2a\u52a8\u6001\u6570\u7ec4\uff0c\u5b83\u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5176\u5927\u5c0f\u4ee5\u5bb9\u7eb3\u65b0\u5143\u7d20\u3002\u8981\u5411 ArrayList \u6dfb\u52a0\u65b0\u503c\uff0c\u8bf7\u4f7f\u7528 add() \u65b9\u6cd5\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b import java.util.ArrayList; public class Main { public static void main(String[] args) { ArrayList&lt;Integer&gt; numbers = new ArrayList&lt;&gt;(); numbers.add(1); numbers.add(2); numbers.add(3); } } \u767b\u5f55\u540e\u590d\u5236 2. \u5c06\u6570\u7ec4\u8f6c\u6362\u4e3a\u5217\u8868\u518d\u6dfb\u52a0\u503c \u60a8\u53ef\u4ee5\u5c06\u73b0\u6709\u7684\u6570\u7ec4\u8f6c\u6362\u4e3a ArrayList\uff0c\u7136\u540e\u4f7f\u7528 add() [&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-66014","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66014","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=66014"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66014\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66014"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66014"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66014"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}