{"id":66050,"date":"2025-05-03T16:31:04","date_gmt":"2025-05-03T08:31:04","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66050\/"},"modified":"2025-05-03T16:31:04","modified_gmt":"2025-05-03T08:31:04","slug":"java%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e7%ad%89%e4%ba%8e-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66050\/","title":{"rendered":"java\u5b57\u7b26\u4e32\u6570\u7ec4\u600e\u4e48\u7b49\u4e8e"},"content":{"rendered":"<blockquote><p>\n  \u5b57\u7b26\u4e32\u6570\u7ec4\u8d4b\u503c\u65b9\u5f0f\uff1a\u4ece\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\u590d\u5236\uff1a\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\uff0c\u6307\u5b9a\u6e90\u6570\u7ec4\u3001\u76ee\u6807\u6570\u7ec4\u548c\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf\u3002\u4ece\u5355\u4e2a\u5b57\u7b26\u4e32\u521d\u59cb\u5316\uff1a\u4f7f\u7528 arrays.fill() \u65b9\u6cd5\uff0c\u6307\u5b9a\u5b57\u7b26\u4e32\u6570\u7ec4\u548c\u8981\u586b\u5145\u7684\u5b57\u7b26\u4e32\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/14\/2024111412333963075.jpg\" class=\"aligncenter\" title=\"java\u5b57\u7b26\u4e32\u6570\u7ec4\u600e\u4e48\u7b49\u4e8e\u63d2\u56fe\" alt=\"java\u5b57\u7b26\u4e32\u6570\u7ec4\u600e\u4e48\u7b49\u4e8e\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u5982\u4f55\u8d4b\u503c<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u53ef\u4ee5\u4ece\u5176\u4ed6\u5b57\u7b26\u4e32\u6570\u7ec4\u6216\u5355\u4e2a\u5b57\u7b26\u4e32\u590d\u5236\u6216\u521d\u59cb\u5316\u3002<\/p>\n<p><strong>\u4ece\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\u590d\u5236<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u4ece\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\u590d\u5236\u5143\u7d20\u3002\u8be5\u65b9\u6cd5\u5177\u6709\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>public static void arraycopy(Object src, int srcPos, Object dest, int destPos, int length)<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li>src \u662f\u6e90\u6570\u7ec4<\/li>\n<li>srcPos \u662f\u6e90\u6570\u7ec4\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e<\/li>\n<li>dest \u662f\u76ee\u6807\u6570\u7ec4<\/li>\n<li>destPos \u662f\u76ee\u6807\u6570\u7ec4\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e<\/li>\n<li>length \u662f\u8981\u590d\u5236\u7684\u5143\u7d20\u6570<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>String[] arr1 = {\"Java\", \"Python\", \"C++\"};\nString[] arr2 = new String[arr1.length];\n\nSystem.arraycopy(arr1, 0, arr2, 0, arr1.length);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u73b0\u5728\uff0carr2 \u5c06\u5305\u542b\u4e0e arr1 \u76f8\u540c\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<p><strong>\u4ece\u5355\u4e2a\u5b57\u7b26\u4e32\u521d\u59cb\u5316<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 Arrays.fill() \u65b9\u6cd5\u7528\u5355\u4e2a\u5b57\u7b26\u4e32\u521d\u59cb\u5316\u5b57\u7b26\u4e32\u6570\u7ec4\u3002\u8be5\u65b9\u6cd5\u5177\u6709\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n<pre>public static void fill(Object[] arr, Object val)<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li>arr \u662f\u8981\u586b\u5145\u7684\u6570\u7ec4<\/li>\n<li>val \u662f\u586b\u5145\u503c<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>String[] arr = new String[5];\nArrays.fill(arr, \"Hello\");<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u73b0\u5728\uff0carr \u4e2d\u7684\u6240\u6709\u5143\u7d20\u90fd\u5c06\u662f\u5b57\u7b26\u4e32 &#8220;Hello&#8221;\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u7b49\u4e8e\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>\u5b57\u7b26\u4e32\u6570\u7ec4\u8d4b\u503c\u65b9\u5f0f\uff1a\u4ece\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\u590d\u5236\uff1a\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\uff0c\u6307\u5b9a\u6e90\u6570\u7ec4\u3001\u76ee\u6807\u6570\u7ec4\u548c\u8981\u590d\u5236\u7684\u5143\u7d20\u6570\u91cf\u3002\u4ece\u5355\u4e2a\u5b57\u7b26\u4e32\u521d\u59cb\u5316\uff1a\u4f7f\u7528 arrays.fill() \u65b9\u6cd5\uff0c\u6307\u5b9a\u5b57\u7b26\u4e32\u6570\u7ec4\u548c\u8981\u586b\u5145\u7684\u5b57\u7b26\u4e32\u3002 Java \u5982\u4f55\u8d4b\u503c \u5728 Java \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u53ef\u4ee5\u4ece\u5176\u4ed6\u5b57\u7b26\u4e32\u6570\u7ec4\u6216\u5355\u4e2a\u5b57\u7b26\u4e32\u590d\u5236\u6216\u521d\u59cb\u5316\u3002 \u4ece\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\u590d\u5236 \u53ef\u4ee5\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u4ece\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\u590d\u5236\u5143\u7d20\u3002\u8be5\u65b9\u6cd5\u5177\u6709\u4ee5\u4e0b\u8bed\u6cd5\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b public static void arraycopy(Object src, int srcPos, Object dest, int destPos, int length) \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a src \u662f\u6e90\u6570\u7ec4 srcPos \u662f\u6e90\u6570\u7ec4\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e dest \u662f\u76ee\u6807\u6570\u7ec4 destPos \u662f\u76ee\u6807\u6570\u7ec4\u4e2d\u7684\u8d77\u59cb\u4f4d\u7f6e length \u662f\u8981\u590d\u5236\u7684\u5143\u7d20\u6570 \u4f8b\u5982\uff1a String[] arr1 = {&#8220;Java&#8221;, &#8220;Python&#8221;, &#8220;C++&#8221;}; String[] arr2 = new String[arr1.length]; System.arraycopy(arr1, 0, arr2, [&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-66050","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66050","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=66050"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66050\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66050"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66050"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66050"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}