{"id":38781,"date":"2024-11-26T13:11:14","date_gmt":"2024-11-26T05:11:14","guid":{"rendered":"https:\/\/fwq.ai\/blog\/38781\/"},"modified":"2024-11-26T13:11:14","modified_gmt":"2024-11-26T05:11:14","slug":"java%e6%80%8e%e4%b9%88%e4%b8%ba%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%95%b0%e7%bb%84%e6%b7%bb%e5%8a%a0","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/38781\/","title":{"rendered":"java\u600e\u4e48\u4e3a\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0"},"content":{"rendered":"<blockquote><p>\n  \u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\u6709\uff1a\u76f4\u63a5\u8d4b\u503c\u3001arrays.copyof()\u3001arraylist\u3001java 8 \u6d41\u64cd\u4f5c\u3002\u76f4\u63a5\u8d4b\u503c\u662f\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\uff0carrays.copyof() \u53ef\u521b\u5efa\u65b0\u6570\u7ec4\u5e76\u5305\u542b\u539f\u6570\u7ec4\u5143\u7d20\uff0carraylist \u5141\u8bb8\u52a8\u6001\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\uff0cjava 8 \u6d41\u64cd\u4f5c\u53ef\u901a\u8fc7 collectors.tolist() \u8f6c\u6362\u4e3a\u5217\u8868\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/15\/2024111506213596964.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u4e3a\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u63d2\u56fe\" alt=\"java\u600e\u4e48\u4e3a\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4e3a Java \u6dfb\u52a0\u5143\u7d20<\/strong><\/p>\n<p><strong>\u76f4\u63a5\u8d4b\u503c<\/strong><\/p>\n<ul>\n<li>\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u901a\u8fc7\u8d4b\u503c\u8bed\u53e5\u4e3a\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre>String[] names = new String[3];\nnames[0] = \"Alice\";\nnames[1] = \"Bob\";\nnames[2] = \"Carol\";<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Arrays.copyOf()<\/strong><\/p>\n<ul>\n<li>\u5982\u679c\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u5e76\u5305\u542b\u73b0\u6709\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u6307\u5b9a\u6570\u7ec4\u7684\u4e00\u4efd\u526f\u672c\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre>String[] originalNames = {\"Alice\", \"Bob\"};\nString[] newNames = Arrays.copyOf(originalNames, 3);  \/\/ \u6dfb\u52a0\u4e00\u4e2a\u7a7a\u5143\u7d20\nnewNames[2] = \"Carol\";<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 ArrayList<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li>\u5bf9\u4e8e\u9700\u8981\u66f4\u7075\u6d3b\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 java.util.ArrayList \u7c7b\u3002ArrayList \u5141\u8bb8\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\uff0c\u800c\u65e0\u9700\u521b\u5efa\u65b0\u7684\u6570\u7ec4\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre>List&lt;String&gt; names = new ArrayList&lt;&gt;();\nnames.add(\"Alice\");\nnames.add(\"Bob\");\nnames.add(\"Carol\");<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528 Stream<\/strong><\/p>\n<ul>\n<li>Java 8 \u53ca\u66f4\u9ad8\u7248\u672c\u652f\u6301\u4f7f\u7528\u6d41\u64cd\u4f5c\u3002\u53ef\u4ee5\u4f7f\u7528 Collectors.toList() \u65b9\u6cd5\u5c06\u6d41\u8f6c\u6362\u4e3a\u5217\u8868\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre>String[] originalNames = {\"Alice\", \"Bob\"};\nList&lt;String&gt; newNames = Stream.of(originalNames)\n    .collect(Collectors.toList());\nnewNames.add(\"Carol\");<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u5f53\u4f7f\u7528\u6570\u7ec4\u65f6\uff0c\u6570\u7ec4\u7684\u5927\u5c0f\u662f\u56fa\u5b9a\u7684\uff0c\u56e0\u6b64\u5728\u6dfb\u52a0\u5143\u7d20\u4e4b\u524d\u9700\u8981\u786e\u4fdd\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u3002<\/li>\n<li>ArrayList \u53ef\u4ee5\u81ea\u52a8\u8c03\u6574\u5176\u5927\u5c0f\uff0c\u4f46\u521b\u5efa\u65b0 ArrayList \u65f6\u9700\u8981\u6307\u5b9a\u521d\u59cb\u5bb9\u91cf\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u4e3a\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>\u5b57\u7b26\u4e32\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u7684\u65b9\u6cd5\u6709\uff1a\u76f4\u63a5\u8d4b\u503c\u3001arrays.copyof()\u3001arraylist\u3001java 8 \u6d41\u64cd\u4f5c\u3002\u76f4\u63a5\u8d4b\u503c\u662f\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\uff0carrays.copyof() \u53ef\u521b\u5efa\u65b0\u6570\u7ec4\u5e76\u5305\u542b\u539f\u6570\u7ec4\u5143\u7d20\uff0carraylist \u5141\u8bb8\u52a8\u6001\u6dfb\u52a0\u548c\u5220\u9664\u5143\u7d20\uff0cjava 8 \u6d41\u64cd\u4f5c\u53ef\u901a\u8fc7 collectors.tolist() \u8f6c\u6362\u4e3a\u5217\u8868\u3002 \u5982\u4f55\u4e3a Java \u6dfb\u52a0\u5143\u7d20 \u76f4\u63a5\u8d4b\u503c \u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u901a\u8fc7\u8d4b\u503c\u8bed\u53e5\u4e3a\u6570\u7ec4\u6dfb\u52a0\u5143\u7d20\u3002\u4f8b\u5982\uff1a String[] names = new String[3]; names[0] = &#8220;Alice&#8221;; names[1] = &#8220;Bob&#8221;; names[2] = &#8220;Carol&#8221;; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 Arrays.copyOf() \u5982\u679c\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\u5e76\u5305\u542b\u73b0\u6709\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.copyOf() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5176\u4e2d\u5305\u542b\u6307\u5b9a\u6570\u7ec4\u7684\u4e00\u4efd\u526f\u672c\u3002\u4f8b\u5982\uff1a String[] originalNames = {&#8220;Alice&#8221;, &#8220;Bob&#8221;}; String[] newNames = Arrays.copyOf(originalNames, 3); \/\/ \u6dfb\u52a0\u4e00\u4e2a\u7a7a\u5143\u7d20 newNames[2] = &#8220;Carol&#8221;; \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528 ArrayList \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u5bf9\u4e8e\u9700\u8981\u66f4\u7075\u6d3b\u7684\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528 java.util.ArrayList [&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-38781","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38781","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=38781"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38781\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=38781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=38781"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=38781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}