{"id":39600,"date":"2024-11-26T08:57:35","date_gmt":"2024-11-26T00:57:35","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39600\/"},"modified":"2024-11-26T08:57:35","modified_gmt":"2024-11-26T00:57:35","slug":"java%e6%80%8e%e4%b9%88%e6%88%aa%e5%8f%96%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39600\/","title":{"rendered":"java\u600e\u4e48\u622a\u53d6\u5b57\u7b26\u4e32\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u622a\u53d6\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\uff0c\u4ece\u6307\u5b9a\u7d22\u5f15\u5f00\u59cb\u622a\u53d6\u5230\u53e6\u4e00\u4e2a\u7d22\u5f15\u7ed3\u675f\u3002\u4f7f\u7528 arrays.copyofrange() \u65b9\u6cd5\uff08java 9 \u53ca\u66f4\u9ad8\u7248\u672c\uff09\uff0c\u4ece\u6307\u5b9a\u7d22\u5f15\u5f00\u59cb\u622a\u53d6\u5230\u53e6\u4e00\u4e2a\u7d22\u5f15\u7ed3\u675f\uff0c\u81ea\u52a8\u521b\u5efa\u76ee\u6807\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/16\/2024111618251545000.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u622a\u53d6\u5b57\u7b26\u4e32\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u600e\u4e48\u622a\u53d6\u5b57\u7b26\u4e32\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u622a\u53d6 Java \u4e2d\u7684<\/strong><\/p>\n<p>\u5728 Java \u4e2d\u622a\u53d6\u5b57\u7b26\u4e32\u6570\u7ec4\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5<\/strong><\/p>\n<pre>\/\/ \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\nString[] arr = {\"a\", \"b\", \"c\", \"d\", \"e\"};\n\n\/\/ \u4ece\u7d22\u5f15 1 \u5f00\u59cb\u622a\u53d6\u5230\u7d22\u5f15 3 \u7ed3\u675f\nString[] subArray1 = new String[3];\nSystem.arraycopy(arr, 1, subArray1, 0, 3); \/\/ [b, c, d]\n\n\/\/ \u4ece\u7d22\u5f15 0 \u5f00\u59cb\u622a\u53d6\u5230\u7d22\u5f15 3 \u7ed3\u675f\nString[] subArray2 = new String[3];\nSystem.arraycopy(arr, 0, subArray2, 0, 3); \/\/ [a, b, c]<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528 Arrays.copyOfRange() \u65b9\u6cd5\uff08Java 9 \u53ca\u66f4\u9ad8\u7248\u672c\uff09<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>\/\/ \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\nString[] arr = {\"a\", \"b\", \"c\", \"d\", \"e\"};\n\n\/\/ \u4ece\u7d22\u5f15 1 \u5f00\u59cb\u622a\u53d6\u5230\u7d22\u5f15 3 \u7ed3\u675f\nString[] subArray1 = Arrays.copyOfRange(arr, 1, 3); \/\/ [b, c]\n\n\/\/ \u4ece\u7d22\u5f15 0 \u5f00\u59cb\u622a\u53d6\u5230\u7d22\u5f15 3 \u7ed3\u675f\nString[] subArray2 = Arrays.copyOfRange(arr, 0, 3); \/\/ [a, b, c]<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u4e24\u79cd\u65b9\u6cd5\u90fd\u53ef\u4ee5\u6709\u6548\u5730\u622a\u53d6\u5b57\u7b26\u4e32\u6570\u7ec4\uff0c\u4f46 <strong>System.arraycopy()<\/strong> \u65b9\u6cd5\u8981\u6c42\u60a8\u521b\u5efa\u76ee\u6807\u6570\u7ec4\uff0c\u800c <strong>Arrays.copyOfRange()<\/strong> \u65b9\u6cd5\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u3002\u5728 Java 9 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c<strong>Arrays.copyOfRange()<\/strong> \u65b9\u6cd5\u662f\u66f4\u7b80\u6d01\u3001\u66f4\u6613\u8bfb\u7684\u9009\u62e9\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u622a\u53d6\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\u622a\u53d6\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\uff0c\u4ece\u6307\u5b9a\u7d22\u5f15\u5f00\u59cb\u622a\u53d6\u5230\u53e6\u4e00\u4e2a\u7d22\u5f15\u7ed3\u675f\u3002\u4f7f\u7528 arrays.copyofrange() \u65b9\u6cd5\uff08java 9 \u53ca\u66f4\u9ad8\u7248\u672c\uff09\uff0c\u4ece\u6307\u5b9a\u7d22\u5f15\u5f00\u59cb\u622a\u53d6\u5230\u53e6\u4e00\u4e2a\u7d22\u5f15\u7ed3\u675f\uff0c\u81ea\u52a8\u521b\u5efa\u76ee\u6807\u6570\u7ec4\u3002 \u5982\u4f55\u622a\u53d6 Java \u4e2d\u7684 \u5728 Java \u4e2d\u622a\u53d6\u5b57\u7b26\u4e32\u6570\u7ec4\u6709\u4e24\u79cd\u4e3b\u8981\u65b9\u6cd5\uff1a 1. \u4f7f\u7528 System.arraycopy() \u65b9\u6cd5 \/\/ \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4 String[] arr = {&#8220;a&#8221;, &#8220;b&#8221;, &#8220;c&#8221;, &#8220;d&#8221;, &#8220;e&#8221;}; \/\/ \u4ece\u7d22\u5f15 1 \u5f00\u59cb\u622a\u53d6\u5230\u7d22\u5f15 3 \u7ed3\u675f String[] subArray1 = new String[3]; System.arraycopy(arr, 1, subArray1, 0, 3); \/\/ [b, c, d] \/\/ \u4ece\u7d22\u5f15 0 \u5f00\u59cb\u622a\u53d6\u5230\u7d22\u5f15 3 \u7ed3\u675f String[] [&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-39600","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39600","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=39600"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39600\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39600"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39600"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39600"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}