{"id":38072,"date":"2024-11-26T12:01:36","date_gmt":"2024-11-26T04:01:36","guid":{"rendered":"https:\/\/fwq.ai\/blog\/38072\/"},"modified":"2024-11-26T12:01:36","modified_gmt":"2024-11-26T04:01:36","slug":"java%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/38072\/","title":{"rendered":"java\u600e\u4e48\u6dfb\u52a0\u5b57\u7b26\u4e32\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u5411\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\uff1a\u6570\u7ec4\u521d\u59cb\u5316\u8bed\u6cd5\uff1a\u521b\u5efa\u6570\u7ec4\u65f6\u4e00\u6b21\u6027\u586b\u5145\u5143\u7d20\u3002arrays.copyof() \u65b9\u6cd5\uff1a\u6269\u5c55\u73b0\u6709\u6570\u7ec4\uff0c\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u6ce8\u610f\uff0c\u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff0c\u8d85\u51fa\u8fb9\u754c\u4f1a\u5f15\u53d1\u5f02\u5e38\uff0c\u4e14\u539f\u59cb\u6570\u7ec4\u4e0d\u4f1a\u88ab\u4fee\u6539\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111316303166972.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u6dfb\u52a0\u5b57\u7b26\u4e32\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u600e\u4e48\u6dfb\u52a0\u5b57\u7b26\u4e32\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u6dfb\u52a0<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u5411\u5b57\u7b26\u4e32\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a<\/p>\n<p><strong>\u65b9\u6cd5 1\uff1a\u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u8bed\u6cd5<\/strong><\/p>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u5728\u521b\u5efa\u6570\u7ec4\u65f6\u4f7f\u7528\uff0c\u53ef\u4ee5\u4e00\u6b21\u6027\u5411\u6570\u7ec4\u4e2d\u586b\u5145\u591a\u4e2a\u5143\u7d20\u3002\u4f8b\u5982\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>String[] names = {\"Alice\", \"Bob\", \"Carol\"};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u65b9\u6cd5 2\uff1a\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5<\/strong><\/p>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u7528\u4e8e\u5c06\u73b0\u6709\u6570\u7ec4\u6269\u5c55\u4e3a\u5305\u542b\u65b0\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>String[] newNames = Arrays.copyOf(names, names.length + 1);\nnewNames[names.length] = \"Dave\";<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4 newNames\uff0c\u5b83\u5305\u542b names \u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\uff0c\u5e76\u6dfb\u52a0\u4e86\u4e00\u4e2a\u65b0\u5143\u7d20 &#8220;Dave&#8221;\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li> <strong>\u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff1a<\/strong>Java \u4e2d\u7684\u6570\u7ec4\u5927\u5c0f\u662f\u56fa\u5b9a\u7684\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u66f4\u6539\u3002<\/li>\n<li> <strong>\u6dfb\u52a0\u5143\u7d20\u8d85\u51fa\u8fb9\u754c\uff1a<\/strong>\u5982\u679c\u5c1d\u8bd5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u8d85\u8fc7\u5176\u5bb9\u91cf\u7684\u5143\u7d20\uff0c\u5c06\u4f1a\u629b\u51fa ArrayIndexOutOfBoundsException \u5f02\u5e38\u3002<\/li>\n<li> <strong>\u539f\u59cb\u6570\u7ec4\u4e0d\u53d8\uff1a<\/strong>\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u4e0d\u4f1a\u4fee\u6539\u539f\u59cb\u6570\u7ec4\uff0c\u5b83\u5c06\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u6dfb\u52a0\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>\u5728 java \u4e2d\uff0c\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u5411\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\uff1a\u6570\u7ec4\u521d\u59cb\u5316\u8bed\u6cd5\uff1a\u521b\u5efa\u6570\u7ec4\u65f6\u4e00\u6b21\u6027\u586b\u5145\u5143\u7d20\u3002arrays.copyof() \u65b9\u6cd5\uff1a\u6269\u5c55\u73b0\u6709\u6570\u7ec4\uff0c\u6dfb\u52a0\u65b0\u5143\u7d20\u3002\u6ce8\u610f\uff0c\u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff0c\u8d85\u51fa\u8fb9\u754c\u4f1a\u5f15\u53d1\u5f02\u5e38\uff0c\u4e14\u539f\u59cb\u6570\u7ec4\u4e0d\u4f1a\u88ab\u4fee\u6539\u3002 \u5982\u4f55\u5728 Java \u4e2d\u6dfb\u52a0 \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u5411\u5b57\u7b26\u4e32\u6570\u7ec4\u4e2d\u6dfb\u52a0\u5143\u7d20\uff1a \u65b9\u6cd5 1\uff1a\u4f7f\u7528\u6570\u7ec4\u521d\u59cb\u5316\u8bed\u6cd5 \u8fd9\u79cd\u65b9\u6cd5\u5728\u521b\u5efa\u6570\u7ec4\u65f6\u4f7f\u7528\uff0c\u53ef\u4ee5\u4e00\u6b21\u6027\u5411\u6570\u7ec4\u4e2d\u586b\u5145\u591a\u4e2a\u5143\u7d20\u3002\u4f8b\u5982\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b String[] names = {&#8220;Alice&#8221;, &#8220;Bob&#8221;, &#8220;Carol&#8221;}; \u767b\u5f55\u540e\u590d\u5236 \u65b9\u6cd5 2\uff1a\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5 \u8fd9\u79cd\u65b9\u6cd5\u7528\u4e8e\u5c06\u73b0\u6709\u6570\u7ec4\u6269\u5c55\u4e3a\u5305\u542b\u65b0\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a String[] newNames = Arrays.copyOf(names, names.length + 1); newNames[names.length] = &#8220;Dave&#8221;; \u767b\u5f55\u540e\u590d\u5236 \u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4 newNames\uff0c\u5b83\u5305\u542b names \u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\uff0c\u5e76\u6dfb\u52a0\u4e86\u4e00\u4e2a\u65b0\u5143\u7d20 &#8220;Dave&#8221;\u3002 \u6ce8\u610f\uff1a \u6570\u7ec4\u5927\u5c0f\u56fa\u5b9a\uff1aJava \u4e2d\u7684\u6570\u7ec4\u5927\u5c0f\u662f\u56fa\u5b9a\u7684\uff0c\u4e00\u65e6\u521b\u5efa\u5c31\u4e0d\u80fd\u66f4\u6539\u3002 \u6dfb\u52a0\u5143\u7d20\u8d85\u51fa\u8fb9\u754c\uff1a\u5982\u679c\u5c1d\u8bd5\u5411\u6570\u7ec4\u4e2d\u6dfb\u52a0\u8d85\u8fc7\u5176\u5bb9\u91cf\u7684\u5143\u7d20\uff0c\u5c06\u4f1a\u629b\u51fa ArrayIndexOutOfBoundsException \u5f02\u5e38\u3002 \u539f\u59cb\u6570\u7ec4\u4e0d\u53d8\uff1a\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u4e0d\u4f1a\u4fee\u6539\u539f\u59cb\u6570\u7ec4\uff0c\u5b83\u5c06\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\u3002 \u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u6dfb\u52a0\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/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-38072","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38072","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=38072"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38072\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=38072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=38072"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=38072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}