{"id":65242,"date":"2025-05-03T15:08:49","date_gmt":"2025-05-03T07:08:49","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65242\/"},"modified":"2025-05-03T15:08:49","modified_gmt":"2025-05-03T07:08:49","slug":"java%e6%80%8e%e4%b9%88%e5%88%87%e5%89%b2%e6%95%b0%e7%bb%84-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65242\/","title":{"rendered":"java\u600e\u4e48\u5207\u5272\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  \u53ef\u4ee5\u4f7f\u7528 arrays.copyofrange() \u65b9\u6cd5\u3001system.arraycopy() \u65b9\u6cd5\u6216\u6d41 api \u6765\u5207\u5272 java \u6570\u7ec4\uff1aarrays.copyofrange()\uff1a\u8fd4\u56de\u6307\u5b9a\u8303\u56f4\u5185\u6570\u7ec4\u5143\u7d20\u7684\u526f\u672c\u3002system.arraycopy()\uff1a\u5c06\u6570\u636e\u4ece\u4e00\u4e2a\u6570\u7ec4\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\uff0c\u53ef\u7528\u4e8e\u5207\u5272\u6570\u7ec4\u3002\u6d41\uff1a\u4f7f\u7528 intstream.range() \u65b9\u6cd5\u521b\u5efa\u8303\u56f4\uff0c\u5e76\u4f7f\u7528 map() \u65b9\u6cd5\u63d0\u53d6\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/12\/2024111214071064053.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5207\u5272\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5207\u5272\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528 Java \u5207\u5272\u6570\u7ec4<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5207\u5272\u6570\u7ec4\u662f\u6307\u5c06\u5176\u5206\u6210\u8f83\u5c0f\u7684\u5b50\u6570\u7ec4\u3002\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u505a\u5230\u8fd9\u4e00\u70b9\u3002<\/p>\n<p><strong>\u4f7f\u7528 Arrays.copyOfRange() \u65b9\u6cd5<\/strong><\/p>\n<p>Arrays.copyOfRange() \u65b9\u6cd5\u662f\u5207\u5272\u6570\u7ec4\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u3002\u5b83\u8fd4\u56de\u7ed9\u5b9a\u8303\u56f4\u5185\u7684\u6570\u7ec4\u5143\u7d20\u7684\u526f\u672c\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u5b83\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] originalArray = {1, 2, 3, 4, 5};\nint startIndex = 1;\nint endIndex = 3;\nint[] subArray = Arrays.copyOfRange(originalArray, startIndex, endIndex);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5<\/strong><\/p>\n<p>System.arraycopy() \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u636e\u4ece\u4e00\u4e2a\u6570\u7ec4\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u3002\u5b83\u4e5f\u53ef\u4ee5\u7528\u4e8e\u5207\u5272\u6570\u7ec4\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u5b83\uff1a<\/p>\n<pre>int[] originalArray = {1, 2, 3, 4, 5};\nint startIndex = 1;\nint endIndex = 3;\nint subArrayLength = endIndex - startIndex;\nint[] subArray = new int[subArrayLength];\nSystem.arraycopy(originalArray, startIndex, subArray, 0, subArrayLength);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528\u6d41<\/strong><\/p>\n<p>Java 8 \u5f15\u5165\u7684\u6d41 API \u4e5f\u53ef\u4ee5\u7528\u4e8e\u5207\u5272\u6570\u7ec4\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u5b83\uff1a<\/p>\n<pre>int[] originalArray = {1, 2, 3, 4, 5};\nint startIndex = 1;\nint endIndex = 3;\nint[] subArray = IntStream.range(startIndex, endIndex).map(i -&gt; originalArray[i]).toArray();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u4e09\u79cd\u65b9\u6cd5\u4e2d\uff0cArrays.copyOfRange() \u6700\u7b80\u5355\uff0c\u800c\u6d41\u65b9\u6cd5\u6700\u7075\u6d3b\u3002\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u6700\u5408\u9002\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5207\u5272\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>\u53ef\u4ee5\u4f7f\u7528 arrays.copyofrange() \u65b9\u6cd5\u3001system.arraycopy() \u65b9\u6cd5\u6216\u6d41 api \u6765\u5207\u5272 java \u6570\u7ec4\uff1aarrays.copyofrange()\uff1a\u8fd4\u56de\u6307\u5b9a\u8303\u56f4\u5185\u6570\u7ec4\u5143\u7d20\u7684\u526f\u672c\u3002system.arraycopy()\uff1a\u5c06\u6570\u636e\u4ece\u4e00\u4e2a\u6570\u7ec4\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\uff0c\u53ef\u7528\u4e8e\u5207\u5272\u6570\u7ec4\u3002\u6d41\uff1a\u4f7f\u7528 intstream.range() \u65b9\u6cd5\u521b\u5efa\u8303\u56f4\uff0c\u5e76\u4f7f\u7528 map() \u65b9\u6cd5\u63d0\u53d6\u539f\u59cb\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002 \u5982\u4f55\u4f7f\u7528 Java \u5207\u5272\u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u5207\u5272\u6570\u7ec4\u662f\u6307\u5c06\u5176\u5206\u6210\u8f83\u5c0f\u7684\u5b50\u6570\u7ec4\u3002\u6709\u51e0\u79cd\u65b9\u6cd5\u53ef\u4ee5\u505a\u5230\u8fd9\u4e00\u70b9\u3002 \u4f7f\u7528 Arrays.copyOfRange() \u65b9\u6cd5 Arrays.copyOfRange() \u65b9\u6cd5\u662f\u5207\u5272\u6570\u7ec4\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u3002\u5b83\u8fd4\u56de\u7ed9\u5b9a\u8303\u56f4\u5185\u7684\u6570\u7ec4\u5143\u7d20\u7684\u526f\u672c\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u5b83\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] originalArray = {1, 2, 3, 4, 5}; int startIndex = 1; int endIndex = 3; int[] subArray = Arrays.copyOfRange(originalArray, startIndex, endIndex); \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5 System.arraycopy() \u65b9\u6cd5\u53ef\u4ee5\u5c06\u6570\u636e\u4ece\u4e00\u4e2a\u6570\u7ec4\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\u3002\u5b83\u4e5f\u53ef\u4ee5\u7528\u4e8e\u5207\u5272\u6570\u7ec4\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u5b83\uff1a int[] originalArray = [&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-65242","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65242","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=65242"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65242\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65242"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65242"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}