{"id":66222,"date":"2025-05-03T15:01:42","date_gmt":"2025-05-03T07:01:42","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66222\/"},"modified":"2025-05-03T15:01:42","modified_gmt":"2025-05-03T07:01:42","slug":"java%e4%b8%ad%e7%9a%84%e6%95%b0%e7%bb%84%e7%9a%84%e4%b8%8b%e6%a0%87%e6%80%8e%e4%b9%88%e6%b1%82-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66222\/","title":{"rendered":"java\u4e2d\u7684\u6570\u7ec4\u7684\u4e0b\u6807\u600e\u4e48\u6c42"},"content":{"rendered":"

\n java\u6570\u7ec4\u4e0b\u6807\u4ece0\u5f00\u59cb\u3002\u8981\u83b7\u53d6\u5143\u7d20\u4e0b\u6807\uff0c\u53ef\u4ee5\u4f7f\u7528indexof()\u65b9\u6cd5\uff0c\u5176\u53c2\u6570\u4e3a\u8981\u67e5\u627e\u7684\u5143\u7d20\u3002indexof()\u6bd4\u8f83\u5143\u7d20\u5f15\u7528\uff0c\u5982\u679c\u627e\u5230\uff0c\u8fd4\u56de\u7b2c\u4e00\u4e2a\u5339\u914d\u9879\u7684\u4e0b\u6807\uff0c\u5426\u5219\u8fd4\u56de-1\u3002\n<\/p><\/blockquote>\n

\"java\u4e2d\u7684\u6570\u7ec4\u7684\u4e0b\u6807\u600e\u4e48\u6c42\u63d2\u56fe\"<\/p>\n

Java\u6570\u7ec4\u4e0b\u6807\u83b7\u53d6<\/strong><\/p>\n

\u5728Java\u4e2d\uff0c\u6570\u7ec4\u7684\u4e0b\u6807\u4ece0\u5f00\u59cb\u3002\u8fd9\u610f\u5473\u7740\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u4f4d\u4e8e\u7d22\u5f150\uff0c\u7b2c\u4e8c\u4e2a\u5143\u7d20\u4f4d\u4e8e\u7d22\u5f151\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002<\/p>\n

\u8981\u83b7\u53d6\u6570\u7ec4\u4e2d\u7279\u5b9a\u5143\u7d20\u7684\u4e0b\u6807\uff0c\u53ef\u4ee5\u4f7f\u7528indexOf()\u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u6307\u5b9a\u5143\u7d20\u5728\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5339\u914d\u9879\u7684\u4e0b\u6807\uff0c\u5982\u679c\u6ca1\u6709\u5339\u914d\u9879\uff0c\u5219\u8fd4\u56de-1\u3002<\/p>\n

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

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

int indexOf(Object element)<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u53c2\u6570\uff1a<\/strong><\/p>\n
    \n
  • element – \u8981\u67e5\u627e\u7684\u5143\u7d20<\/li>\n<\/ul>\n
    \u793a\u4f8b\uff1a<\/strong><\/p>\n
    \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3anumbers\u7684\u6570\u7ec4\uff0c\u5305\u542b\u4ee5\u4e0b\u5143\u7d20\uff1a<\/p>\n
    int[] numbers = {1, 2, 3, 4, 5};<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8981\u67e5\u627e\u5143\u7d203\u7684\u4e0b\u6807\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
    int index = Arrays.indexOf(numbers, 3);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u53d8\u91cfindex\u5c06\u5b58\u50a8\u5143\u7d203\u5728\u6570\u7ec4\u4e2d\u7684\u4e0b\u6807\uff0c\u53732\u3002<\/p>\n
    \u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n
      \n
    • \u6570\u7ec4\u7684\u4e0b\u6807\u662f\u57fa\u4e8e0\u7684\uff0c\u8fd9\u610f\u5473\u7740\u7d22\u5f150\u662f\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n
    • \u5982\u679c\u627e\u4e0d\u5230\u6307\u5b9a\u7684\u5143\u7d20\uff0cindexOf()\u65b9\u6cd5\u5c06\u8fd4\u56de-1\u3002<\/li>\n
    • indexOf()\u65b9\u6cd5\u4f1a\u6bd4\u8f83\u5143\u7d20\u7684\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u5143\u7d20\u7684\u503c\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u7684\u6570\u7ec4\u7684\u4e0b\u6807\u600e\u4e48\u6c42\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      java\u6570\u7ec4\u4e0b\u6807\u4ece0\u5f00\u59cb\u3002\u8981\u83b7\u53d6\u5143\u7d20\u4e0b\u6807\uff0c\u53ef\u4ee5\u4f7f\u7528indexof()\u65b9\u6cd5\uff0c\u5176\u53c2\u6570\u4e3a\u8981\u67e5\u627e\u7684\u5143\u7d20\u3002indexof()\u6bd4\u8f83\u5143\u7d20\u5f15\u7528\uff0c\u5982\u679c\u627e\u5230\uff0c\u8fd4\u56de\u7b2c\u4e00\u4e2a\u5339\u914d\u9879\u7684\u4e0b\u6807\uff0c\u5426\u5219\u8fd4\u56de-1\u3002 Java\u6570\u7ec4\u4e0b\u6807\u83b7\u53d6 \u5728Java\u4e2d\uff0c\u6570\u7ec4\u7684\u4e0b\u6807\u4ece0\u5f00\u59cb\u3002\u8fd9\u610f\u5473\u7740\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u4f4d\u4e8e\u7d22\u5f150\uff0c\u7b2c\u4e8c\u4e2a\u5143\u7d20\u4f4d\u4e8e\u7d22\u5f151\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002 \u8981\u83b7\u53d6\u6570\u7ec4\u4e2d\u7279\u5b9a\u5143\u7d20\u7684\u4e0b\u6807\uff0c\u53ef\u4ee5\u4f7f\u7528indexOf()\u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u6307\u5b9a\u5143\u7d20\u5728\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5339\u914d\u9879\u7684\u4e0b\u6807\uff0c\u5982\u679c\u6ca1\u6709\u5339\u914d\u9879\uff0c\u5219\u8fd4\u56de-1\u3002 \u8bed\u6cd5\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int indexOf(Object element) \u767b\u5f55\u540e\u590d\u5236 \u53c2\u6570\uff1a element – \u8981\u67e5\u627e\u7684\u5143\u7d20 \u793a\u4f8b\uff1a \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3anumbers\u7684\u6570\u7ec4\uff0c\u5305\u542b\u4ee5\u4e0b\u5143\u7d20\uff1a int[] numbers = {1, 2, 3, 4, 5}; \u767b\u5f55\u540e\u590d\u5236 \u8981\u67e5\u627e\u5143\u7d203\u7684\u4e0b\u6807\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a int index = Arrays.indexOf(numbers, 3); \u767b\u5f55\u540e\u590d\u5236 \u53d8\u91cfindex\u5c06\u5b58\u50a8\u5143\u7d203\u5728\u6570\u7ec4\u4e2d\u7684\u4e0b\u6807\uff0c\u53732\u3002 \u6ce8\u610f\u4e8b\u9879\uff1a \u6570\u7ec4\u7684\u4e0b\u6807\u662f\u57fa\u4e8e0\u7684\uff0c\u8fd9\u610f\u5473\u7740\u7d22\u5f150\u662f\u7b2c\u4e00\u4e2a\u5143\u7d20\u3002 \u5982\u679c\u627e\u4e0d\u5230\u6307\u5b9a\u7684\u5143\u7d20\uff0cindexOf()\u65b9\u6cd5\u5c06\u8fd4\u56de-1\u3002 indexOf()\u65b9\u6cd5\u4f1a\u6bd4\u8f83\u5143\u7d20\u7684\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u5143\u7d20\u7684\u503c\u3002 \u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u7684\u6570\u7ec4\u7684\u4e0b\u6807\u600e\u4e48\u6c42\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\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-66222","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66222","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=66222"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66222\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}