{"id":39813,"date":"2024-11-26T14:47:28","date_gmt":"2024-11-26T06:47:28","guid":{"rendered":"https:\/\/fwq.ai\/blog\/39813\/"},"modified":"2024-11-26T14:47:28","modified_gmt":"2024-11-26T06:47:28","slug":"java8%e6%80%8e%e4%b9%88%e6%8a%8a%e9%9b%86%e5%90%88%e8%bd%ac%e4%b8%ba%e6%96%b0%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/39813\/","title":{"rendered":"java8\u600e\u4e48\u628a\u96c6\u5408\u8f6c\u4e3a\u65b0\u6570\u7ec4"},"content":{"rendered":"

\n \u53ef\u4ee5\u901a\u8fc7 toarray() \u65b9\u6cd5\u5c06\u96c6\u5408\u8f6c\u6362\u4e3a\u6570\u7ec4\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u96c6\u5408\u4e2d\u6240\u6709\u5143\u7d20\u7684\u65b0\u6570\u7ec4\uff0c\u6570\u7ec4\u7c7b\u578b\u4e0e\u96c6\u5408\u5143\u7d20\u7c7b\u578b\u76f8\u540c\u3002\u65b9\u6cd5\u8bed\u6cd5\uff1at[] toarray()\uff0c\u5176\u4e2d t \u662f\u96c6\u5408\u5143\u7d20\u7c7b\u578b\u3002\n<\/p><\/blockquote>\n

\"java8\u600e\u4e48\u628a\u96c6\u5408\u8f6c\u4e3a\u65b0\u6570\u7ec4\u63d2\u56fe\"<\/p>\n

Java 8 \u4e2d\u5c06\u96c6\u5408\u8f6c\u6362\u4e3a\u6570\u7ec4<\/strong><\/p>\n

\u5728 Java 8 \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7 toArray() \u65b9\u6cd5\u5c06\u96c6\u5408\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u96c6\u5408\u4e2d\u6240\u6709\u5143\u7d20\u7684\u65b0\u6570\u7ec4\uff0c\u6570\u7ec4\u7684\u7c7b\u578b\u4e0e\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u7c7b\u578b\u76f8\u540c\u3002<\/p>\n

\u65b9\u6cd5\u8bed\u6cd5\uff1a<\/strong><\/p>\n

T[] toArray()<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5176\u4e2d\uff1a<\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
    \n
  • T \u662f\u96c6\u5408\u4e2d\u5143\u7d20\u7684\u7c7b\u578b\u3002<\/li>\n
  • toArray() \u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u96c6\u5408\u4e2d\u6240\u6709\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u3002<\/li>\n<\/ul>\n
    \u793a\u4f8b\uff1a<\/strong><\/p>\n
    \u4ee5\u4e0b\u793a\u4f8b\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u5b57\u7b26\u4e32\u7684\u96c6\u5408\uff0c\u5e76\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u7ec4\uff1a<\/p>\n
    List<String> languages = Arrays.asList(\"Java\", \"Python\", \"C++\");\nString[] languagesArray = languages.toArray();<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u6ce8\u610f\uff1a<\/strong><\/p>\n
      \n
    • toArray() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\uff0c\u800c\u4e0d\u662f\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u3002\u8fd9\u610f\u5473\u7740\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u5bf9\u8c61\u7684\u5b9e\u9645\u503c\u3002<\/li>\n
    • \u5982\u679c\u96c6\u5408\u5305\u542b\u4e0d\u540c\u7c7b\u578b\u7684\u5143\u7d20\uff0ctoArray() \u65b9\u6cd5\u5c06\u629b\u51fa ArrayStoreException\u3002<\/li>\n
    • \u5982\u679c\u5e0c\u671b\u8fd4\u56de\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff0c\u53ef\u4ee5\u6307\u5b9a\u76ee\u6807\u6570\u7ec4\u7c7b\u578b\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9 toArray() \u65b9\u6cd5\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/li>\n<\/ul>\n
      int[] numbersArray = languages.toArray(new int[languages.size()]);<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u4ee5\u4e0a\u5c31\u662fjava8\u600e\u4e48\u628a\u96c6\u5408\u8f6c\u4e3a\u65b0\u6570\u7ec4\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":"
      \u53ef\u4ee5\u901a\u8fc7 toarray() \u65b9\u6cd5\u5c06\u96c6\u5408\u8f6c\u6362\u4e3a\u6570\u7ec4\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u96c6\u5408\u4e2d\u6240\u6709\u5143\u7d20\u7684\u65b0\u6570\u7ec4\uff0c\u6570\u7ec4\u7c7b\u578b\u4e0e\u96c6\u5408\u5143\u7d20\u7c7b\u578b\u76f8\u540c\u3002\u65b9\u6cd5\u8bed\u6cd5\uff1at[] toarray()\uff0c\u5176\u4e2d t \u662f\u96c6\u5408\u5143\u7d20\u7c7b\u578b\u3002 Java 8 \u4e2d\u5c06\u96c6\u5408\u8f6c\u6362\u4e3a\u6570\u7ec4 \u5728 Java 8 \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7 toArray() \u65b9\u6cd5\u5c06\u96c6\u5408\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u96c6\u5408\u4e2d\u6240\u6709\u5143\u7d20\u7684\u65b0\u6570\u7ec4\uff0c\u6570\u7ec4\u7684\u7c7b\u578b\u4e0e\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u7c7b\u578b\u76f8\u540c\u3002 \u65b9\u6cd5\u8bed\u6cd5\uff1a T[] toArray() \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b T \u662f\u96c6\u5408\u4e2d\u5143\u7d20\u7684\u7c7b\u578b\u3002 toArray() \u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u96c6\u5408\u4e2d\u6240\u6709\u5143\u7d20\u7684\u65b0\u6570\u7ec4\u3002 \u793a\u4f8b\uff1a \u4ee5\u4e0b\u793a\u4f8b\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u5b57\u7b26\u4e32\u7684\u96c6\u5408\uff0c\u5e76\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u7ec4\uff1a List<String> languages = Arrays.asList(“Java”, “Python”, “C++”); String[] languagesArray = languages.toArray(); \u767b\u5f55\u540e\u590d\u5236 \u6ce8\u610f\uff1a toArray() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5f15\u7528\u7c7b\u578b\u6570\u7ec4\uff0c\u800c\u4e0d\u662f\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\u3002\u8fd9\u610f\u5473\u7740\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u5bf9\u8c61\u7684\u5b9e\u9645\u503c\u3002 \u5982\u679c\u96c6\u5408\u5305\u542b\u4e0d\u540c\u7c7b\u578b\u7684\u5143\u7d20\uff0ctoArray() \u65b9\u6cd5\u5c06\u629b\u51fa ArrayStoreException\u3002 \u5982\u679c\u5e0c\u671b\u8fd4\u56de\u57fa\u672c\u7c7b\u578b\u6570\u7ec4\uff0c\u53ef\u4ee5\u6307\u5b9a\u76ee\u6807\u6570\u7ec4\u7c7b\u578b\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9 toArray() \u65b9\u6cd5\uff0c\u5982\u4e0b\u6240\u793a\uff1a int[] numbersArray = languages.toArray(new int[languages.size()]); \u767b\u5f55\u540e\u590d\u5236 \u4ee5\u4e0a\u5c31\u662fjava8\u600e\u4e48\u628a\u96c6\u5408\u8f6c\u4e3a\u65b0\u6570\u7ec4\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-39813","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39813","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=39813"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/39813\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=39813"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=39813"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=39813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}