{"id":66127,"date":"2025-05-03T08:05:21","date_gmt":"2025-05-03T00:05:21","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66127\/"},"modified":"2025-05-03T08:05:21","modified_gmt":"2025-05-03T00:05:21","slug":"java%e6%80%8e%e4%b9%88%e5%88%a0%e9%99%a4%e6%95%b0%e7%bb%84%e9%87%8c%e7%9a%84%e5%85%83%e7%b4%a0-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66127\/","title":{"rendered":"java\u600e\u4e48\u5220\u9664\u6570\u7ec4\u91cc\u7684\u5143\u7d20"},"content":{"rendered":"<blockquote><p>\n  \u8981\u4ece java \u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a1. \u4f7f\u7528 arrays.copyof() \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u6392\u9664\u7279\u5b9a\u7d22\u5f15\u5904\u7684\u5143\u7d20\uff1b2. \u4f7f\u7528 system.arraycopy() \u590d\u5236\u6570\u7ec4\uff0c\u6392\u9664\u7279\u5b9a\u5143\u7d20\uff1b3. \u5c06\u6570\u7ec4\u8f6c\u6362\u6210 arraylist\uff0c\u63d0\u4f9b\u66f4\u7075\u6d3b\u7684\u64cd\u4f5c\uff0c\u4f8b\u5982\u5220\u9664\u591a\u4e2a\u5143\u7d20\u6216\u63d2\u5165\u65b0\u5143\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/15\/2024111502011958965.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5220\u9664\u6570\u7ec4\u91cc\u7684\u5143\u7d20\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5220\u9664\u6570\u7ec4\u91cc\u7684\u5143\u7d20\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 Java \u5220\u9664\u6570\u7ec4\u4e2d\u7684\u5143\u7d20<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u6570\u636e\u7684\u96c6\u5408\u3002\u8981\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 Arrays.copyOf()<\/strong><\/p>\n<ul>\n<li>\u5982\u679c\u8981\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u7279\u5b9a\u7d22\u5f15\u5904\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u6392\u9664\u4e86\u8981\u5220\u9664\u7684\u7d22\u5f15\uff1a<\/li>\n<\/ul>\n<pre>int[] myArray = {1, 2, 3, 4, 5};\nint[] newArray = Arrays.copyOf(myArray, myArray.length - 1);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cnewArray \u5c06\u5305\u542b myArray \u4e2d\u7684\u6240\u6709\u5143\u7d20\uff0c\u9664\u4e86\u7d22\u5f15\u4e3a 3 \u7684\u5143\u7d20\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>2. \u4f7f\u7528 System.arraycopy()<\/strong><\/p>\n<ul>\n<li>\u4e5f\u53ef\u4ee5\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u73b0\u6709\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\uff0c\u540c\u65f6\u6392\u9664\u8981\u5220\u9664\u7684\u5143\u7d20\uff1a<\/li>\n<\/ul>\n<pre>int[] myArray = {1, 2, 3, 4, 5};\nint[] newArray = new int[myArray.length - 1];\nSystem.arraycopy(myArray, 0, newArray, 0, 2);\nSystem.arraycopy(myArray, 3, newArray, 2, 2);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6b64\u793a\u4f8b\u7c7b\u4f3c\u4e8e\u4e0a\u9762\u7684 Arrays.copyOf() \u65b9\u6cd5\uff0c\u4f46\u5141\u8bb8\u66f4\u590d\u6742\u7684\u5143\u7d20\u590d\u5236\u3002<\/p>\n<p><strong>3. \u4f7f\u7528 ArrayList<\/strong><\/p>\n<ul>\n<li>\u5982\u679c\u9700\u8981\u66f4\u7075\u6d3b\u5730\u5904\u7406\u6570\u7ec4\uff0c\u53ef\u4ee5\u5c06\u6570\u7ec4\u8f6c\u6362\u6210 ArrayList\uff0c\u5b83\u662f\u4e00\u4e2a\u52a8\u6001\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff1a<\/li>\n<\/ul>\n<pre>int[] myArray = {1, 2, 3, 4, 5};\nArrayList&lt;Integer&gt; myList = new ArrayList&lt;&gt;(Arrays.asList(myArray));\nmyList.remove(2); \/\/ \u5220\u9664\u7d22\u5f15\u4e3a 2 \u7684\u5143\u7d20\n\nint[] myNewArray = new int[myList.size()];\nfor (int i = 0; i &lt; myList.size(); i++) {\n    myNewArray[i] = myList.get(i);\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u63d0\u4f9b\u4e86\u66f4\u591a\u7684\u7075\u6d3b\u6027\uff0c\u4f8b\u5982\u53ef\u4ee5\u5220\u9664\u591a\u4e2a\u5143\u7d20\u6216\u63d2\u5165\u65b0\u5143\u7d20\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5220\u9664\u6570\u7ec4\u91cc\u7684\u5143\u7d20\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>\u8981\u4ece java \u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a1. \u4f7f\u7528 arrays.copyof() \u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u6392\u9664\u7279\u5b9a\u7d22\u5f15\u5904\u7684\u5143\u7d20\uff1b2. \u4f7f\u7528 system.arraycopy() \u590d\u5236\u6570\u7ec4\uff0c\u6392\u9664\u7279\u5b9a\u5143\u7d20\uff1b3. \u5c06\u6570\u7ec4\u8f6c\u6362\u6210 arraylist\uff0c\u63d0\u4f9b\u66f4\u7075\u6d3b\u7684\u64cd\u4f5c\uff0c\u4f8b\u5982\u5220\u9664\u591a\u4e2a\u5143\u7d20\u6216\u63d2\u5165\u65b0\u5143\u7d20\u3002 \u5982\u4f55\u4f7f\u7528 Java \u5220\u9664\u6570\u7ec4\u4e2d\u7684\u5143\u7d20 \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u79cd\u56fa\u5b9a\u5927\u5c0f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u6570\u636e\u7684\u96c6\u5408\u3002\u8981\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a 1. \u4f7f\u7528 Arrays.copyOf() \u5982\u679c\u8981\u4ece\u6570\u7ec4\u4e2d\u5220\u9664\u7279\u5b9a\u7d22\u5f15\u5904\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u6392\u9664\u4e86\u8981\u5220\u9664\u7684\u7d22\u5f15\uff1a int[] myArray = {1, 2, 3, 4, 5}; int[] newArray = Arrays.copyOf(myArray, myArray.length &#8211; 1); \u767b\u5f55\u540e\u590d\u5236 \u5728\u6b64\u793a\u4f8b\u4e2d\uff0cnewArray \u5c06\u5305\u542b myArray \u4e2d\u7684\u6240\u6709\u5143\u7d20\uff0c\u9664\u4e86\u7d22\u5f15\u4e3a 3 \u7684\u5143\u7d20\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b 2. \u4f7f\u7528 System.arraycopy() \u4e5f\u53ef\u4ee5\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u5c06\u73b0\u6709\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\u4e2d\uff0c\u540c\u65f6\u6392\u9664\u8981\u5220\u9664\u7684\u5143\u7d20\uff1a int[] myArray = [&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-66127","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66127","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=66127"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66127\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}