{"id":37172,"date":"2024-11-26T14:56:44","date_gmt":"2024-11-26T06:56:44","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37172\/"},"modified":"2024-11-26T14:56:44","modified_gmt":"2024-11-26T06:56:44","slug":"java%e6%80%8e%e4%b9%88%e6%8a%8a%e6%95%b0%e7%bb%84%e5%85%83%e7%b4%a0%e5%88%a0%e9%99%a4","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37172\/","title":{"rendered":"java\u600e\u4e48\u628a\u6570\u7ec4\u5143\u7d20\u5220\u9664"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff1a\u5bf9\u4e8e\u53ef\u53d8\u5927\u5c0f\u7684 arraylist\uff0c\u4f7f\u7528 remove(index) \u65b9\u6cd5\u5220\u9664\u7279\u5b9a\u7d22\u5f15\u5904\u7684\u5143\u7d20\u3002\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u4e0d\u5305\u542b\u8981\u5220\u9664\u7684\u5143\u7d20\u3002\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u5c06\u539f\u59cb\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\uff0c\u8df3\u8fc7\u8981\u5220\u9664\u7684\u5143\u7d20\u3002\u4f7f\u7528 java 8 stream \u7684 filter() \u65b9\u6cd5\u6839\u636e\u6761\u4ef6\u8fc7\u6ee4\u6389\u8981\u5220\u9664\u7684\u5143\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111302155376729.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u628a\u6570\u7ec4\u5143\u7d20\u5220\u9664\u63d2\u56fe\" alt=\"java\u600e\u4e48\u628a\u6570\u7ec4\u5143\u7d20\u5220\u9664\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 Java \u5220\u9664\u6570\u7ec4\u5143\u7d20<\/strong><\/p>\n<p>\u5220\u9664 Java \u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u7c7b\u578b\u548c\u6240\u4f7f\u7528\u7684 Java \u7248\u672c\u3002<\/p>\n<p><strong>\u4f7f\u7528 ArrayList<\/strong><\/p>\n<p>ArrayList \u662f Java \u4e2d\u4e00\u4e2a\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u7ec4\u3002\u4e0e\u539f\u59cb\u6570\u7ec4\u4e0d\u540c\uff0cArrayList \u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5220\u9664\u5143\u7d20\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>ArrayList&lt;Integer&gt; list = new ArrayList&lt;&gt;();\nlist.add(1);\nlist.add(2);\nlist.add(3);\n\n\/\/ \u5220\u9664\u7d22\u5f15\u4e3a 1 \u7684\u5143\u7d20\nlist.remove(1);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Arrays.copyOf()<\/strong><\/p>\n<p>Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u539f\u59cb\u6570\u7ec4\u7684\u5143\u7d20\u5b50\u96c6\u3002\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u8981\u5220\u9664\u7684\u5143\u7d20\u7d22\u5f15\u6765\u521b\u5efa\u4e00\u4e2a\u4e0d\u5305\u542b\u8be5\u5143\u7d20\u7684\u65b0\u6570\u7ec4\uff1a<\/p>\n<pre>int[] originalArray = {1, 2, 3, 4, 5};\n\n\/\/ \u521b\u5efa\u4e00\u4e2a\u4e0d\u5305\u542b\u7d22\u5f15\u4e3a 2 \u7684\u5143\u7d20\u7684\u65b0\u6570\u7ec4\nint[] newArray = Arrays.copyOf(originalArray, originalArray.length - 1);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 System.arraycopy()<\/strong><\/p>\n<p>System.arraycopy() \u65b9\u6cd5\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u3002\u53ef\u4ee5\u901a\u8fc7\u5c06\u6e90\u6570\u7ec4\u5143\u7d20\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u4e2d\u6765\u5b9e\u73b0\u5143\u7d20\u5220\u9664\uff1a<\/p>\n<pre>int[] originalArray = {1, 2, 3, 4, 5};\nint[] newArray = new int[originalArray.length - 1];\n\n\/\/ \u5c06 originalArray \u7684\u5143\u7d20\u590d\u5236\u5230 newArray\uff0c\u4f46\u4e0d\u5305\u62ec\u7d22\u5f15\u4e3a 2 \u7684\u5143\u7d20\nSystem.arraycopy(originalArray, 0, newArray, 0, 2);\nSystem.arraycopy(originalArray, 3, newArray, 2, 2);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Java 8 Streams<\/strong><\/p>\n<p>Java 8 \u5f15\u5165\u4e86 Streams\uff0c\u8fd9\u662f\u4e00\u79cd\u53ef\u4ee5\u8f7b\u677e\u5904\u7406\u5143\u7d20\u96c6\u5408\u7684\u9ad8\u7ea7\u62bd\u8c61\u3002\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 filter() \u65b9\u6cd5\u6765\u5220\u9664\u7279\u5b9a\u5143\u7d20\uff1a<\/p>\n<pre>int[] originalArray = {1, 2, 3, 4, 5};\n\n\/\/ \u8fc7\u6ee4\u6389\u7b49\u4e8e 3 \u7684\u5143\u7d20\nint[] newArray = Arrays.stream(originalArray)\n    .filter(i -&gt; i != 3)\n    .toArray();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u628a\u6570\u7ec4\u5143\u7d20\u5220\u9664\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":"<p>java \u4e2d\u5220\u9664\u6570\u7ec4\u5143\u7d20\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff1a\u5bf9\u4e8e\u53ef\u53d8\u5927\u5c0f\u7684 arraylist\uff0c\u4f7f\u7528 remove(index) \u65b9\u6cd5\u5220\u9664\u7279\u5b9a\u7d22\u5f15\u5904\u7684\u5143\u7d20\u3002\u4f7f\u7528 arrays.copyof() \u65b9\u6cd5\u521b\u5efa\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u4e0d\u5305\u542b\u8981\u5220\u9664\u7684\u5143\u7d20\u3002\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u5c06\u539f\u59cb\u6570\u7ec4\u590d\u5236\u5230\u65b0\u6570\u7ec4\uff0c\u8df3\u8fc7\u8981\u5220\u9664\u7684\u5143\u7d20\u3002\u4f7f\u7528 java 8 stream \u7684 filter() \u65b9\u6cd5\u6839\u636e\u6761\u4ef6\u8fc7\u6ee4\u6389\u8981\u5220\u9664\u7684\u5143\u7d20\u3002 \u5982\u4f55\u4f7f\u7528 Java \u5220\u9664\u6570\u7ec4\u5143\u7d20 \u5220\u9664 Java \u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u6570\u7ec4\u7684\u7c7b\u578b\u548c\u6240\u4f7f\u7528\u7684 Java \u7248\u672c\u3002 \u4f7f\u7528 ArrayList ArrayList \u662f Java \u4e2d\u4e00\u4e2a\u53ef\u53d8\u5927\u5c0f\u7684\u6570\u7ec4\u3002\u4e0e\u539f\u59cb\u6570\u7ec4\u4e0d\u540c\uff0cArrayList \u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5220\u9664\u5143\u7d20\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b ArrayList&lt;Integer&gt; list = new ArrayList&lt;&gt;(); list.add(1); list.add(2); list.add(3); \/\/ \u5220\u9664\u7d22\u5f15\u4e3a 1 \u7684\u5143\u7d20 list.remove(1); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Arrays.copyOf() Arrays.copyOf() \u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u539f\u59cb\u6570\u7ec4\u7684\u5143\u7d20\u5b50\u96c6\u3002\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u8981\u5220\u9664\u7684\u5143\u7d20\u7d22\u5f15\u6765\u521b\u5efa\u4e00\u4e2a\u4e0d\u5305\u542b\u8be5\u5143\u7d20\u7684\u65b0\u6570\u7ec4\uff1a int[] originalArray = {1, 2, 3, [&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-37172","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37172","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=37172"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37172\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}