{"id":37503,"date":"2024-11-26T13:10:42","date_gmt":"2024-11-26T05:10:42","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37503\/"},"modified":"2024-11-26T13:10:42","modified_gmt":"2024-11-26T05:10:42","slug":"java%e6%95%b0%e7%bb%84%e7%b4%a2%e5%bc%95%e6%80%8e%e4%b9%88%e5%ae%9e%e7%8e%b0%e7%9a%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37503\/","title":{"rendered":"java\u6570\u7ec4\u7d22\u5f15\u600e\u4e48\u5b9e\u73b0\u7684"},"content":{"rendered":"

\n java\u6570\u7ec4\u7d22\u5f15\u5141\u8bb8\u901a\u8fc7\u4e0b\u6807\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\uff0c\u7531jre\u7ba1\u7406\uff0c\u4f5c\u4e3a\u6570\u7ec4\u5bf9\u8c61\u4e2d\u540d\u4e3alength\u7684\u5185\u90e8\u5b57\u6bb5\u5b9e\u73b0\uff0c\u8868\u793a\u5143\u7d20\u6570\u91cf\u3002jvm\u4e2d\uff0c\u6570\u7ec4\u5b58\u50a8\u4e3a\u8fde\u7eed\u5185\u5b58\u5757\uff0c\u5143\u7d20\u5730\u5740\u901a\u8fc7\u6570\u7ec4\u5bf9\u8c61\u57fa\u5730\u5740base\u4e0e\u4e0b\u6807\u76f8\u52a0\u5f97\u5230\uff0c\u7528\u4e8e\u8bbf\u95ee\u6570\u636e\u3002\n<\/p><\/blockquote>\n

\"java\u6570\u7ec4\u7d22\u5f15\u600e\u4e48\u5b9e\u73b0\u7684\u63d2\u56fe\"<\/p>\n

Java\u6570\u7ec4\u7d22\u5f15\u5b9e\u73b0<\/strong><\/p>\n

Java\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\u3002\u6570\u7ec4\u7d22\u5f15\u5141\u8bb8\u6211\u4eec\u901a\u8fc7\u6570\u7ec4\u4e0b\u6807\u6765\u8bbf\u95ee\u548c\u64cd\u4f5c\u5355\u4e2a\u5143\u7d20\u3002<\/p>\n

\u5b9e\u73b0\u673a\u5236<\/strong><\/p>\n

Java\u6570\u7ec4\u672c\u8d28\u4e0a\u662f\u5bf9\u8c61\uff0c\u7531\u8fd0\u884c\u65f6\u73af\u5883\uff08JRE\uff09\u7ba1\u7406\u3002\u6570\u7ec4\u7684\u7d22\u5f15\u5b9e\u9645\u4e0a\u662f\u6570\u7ec4\u5bf9\u8c61\u4e2d\u4e00\u4e2a\u540d\u4e3alength<\/strong>\u7684\u5185\u90e8\u5b57\u6bb5\uff0c\u8be5\u5b57\u6bb5\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002<\/p>\n

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

\u5728JVM\u4e2d\uff0c\u6570\u7ec4\u88ab\u5b58\u50a8\u4e3a\u8fde\u7eed\u7684\u5185\u5b58\u5757\uff0c\u6bcf\u4e2a\u5143\u7d20\u5360\u7528\u56fa\u5b9a\u7684\u5185\u5b58\u7a7a\u95f4\u3002\u6570\u7ec4\u5143\u7d20\u7684\u57fa\u5730\u5740\u5b58\u50a8\u5728\u6570\u7ec4\u5bf9\u8c61\u7684base<\/strong>\u5b57\u6bb5\u4e2d\u3002<\/p>\n

\u5f53\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\u65f6\uff0cJava\u7f16\u8bd1\u5668\u4f1a\u5c06\u6570\u7ec4\u4e0b\u6807\u4e0ebase<\/strong>\u5b57\u6bb5\u76f8\u52a0\uff0c\u5f97\u5230\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u7684\u5b9e\u9645\u5730\u5740\u3002\u7136\u540e\uff0c\u4f7f\u7528\u6b64\u5730\u5740\u6765\u8bbf\u95ee\u76f8\u5e94\u7684\u6570\u636e\u3002<\/p>\n

\u793a\u4f8b<\/strong><\/p>\n

\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3anums<\/strong>\u7684\u6574\u6570\u6570\u7ec4\uff0c\u5305\u542b5\u4e2a\u5143\u7d20\uff1a<\/p>\n

int[] nums = {1, 2, 3, 4, 5};<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5f53\u6211\u4eec\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20nums[2]<\/strong>\u65f6\uff0c\u7f16\u8bd1\u5668\u4f1a\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n
    \n
  1. \u4ecenums<\/strong>\u6570\u7ec4\u5bf9\u8c61\u4e2d\u83b7\u53d6length<\/strong>\u5b57\u6bb5\u7684\u503c\uff0c\u5373\u6570\u7ec4\u5143\u7d20\u7684\u6570\u91cf\u3002<\/li>\n
  2. \u5c06\u6570\u7ec4\u4e0b\u68072<\/strong>\u4e0ebase<\/strong>\u5b57\u6bb5\u76f8\u52a0\uff0c\u5f97\u5230\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u7684\u5730\u5740\u3002<\/li>\n
  3. \u4f7f\u7528\u6b64\u5730\u5740\u83b7\u53d6\u5143\u7d20\u503c3<\/strong>\u3002<\/li>\n<\/ol>\n
    \u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n
      \n
    •  \u6570\u7ec4\u4e0b\u6807\u662f\u4ece0\u5f00\u59cb\u7684<\/strong>\uff0c\u56e0\u6b64\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u4e0b\u6807\u603b\u662flength-1<\/strong>\u3002<\/li>\n
    • \u5c1d\u8bd5\u8bbf\u95ee\u8d85\u51fa\u6570\u7ec4\u8303\u56f4\u7684\u4e0b\u6807\uff08\u8d1f\u6570\u6216\u5927\u4e8e\u6216\u7b49\u4e8elength<\/strong>\uff09\u4f1a\u5bfc\u81f4ArrayIndexOutOfBoundsException<\/strong>\u3002<\/li>\n
    • \u53ef\u4ee5\u4f7f\u7528length<\/strong>\u5b57\u6bb5\u83b7\u53d6\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002<\/li>\n<\/ul>\n
      \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u7d22\u5f15\u600e\u4e48\u5b9e\u73b0\u7684\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":"
      java\u6570\u7ec4\u7d22\u5f15\u5141\u8bb8\u901a\u8fc7\u4e0b\u6807\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\uff0c\u7531jre\u7ba1\u7406\uff0c\u4f5c\u4e3a\u6570\u7ec4\u5bf9\u8c61\u4e2d\u540d\u4e3alength\u7684\u5185\u90e8\u5b57\u6bb5\u5b9e\u73b0\uff0c\u8868\u793a\u5143\u7d20\u6570\u91cf\u3002jvm\u4e2d\uff0c\u6570\u7ec4\u5b58\u50a8\u4e3a\u8fde\u7eed\u5185\u5b58\u5757\uff0c\u5143\u7d20\u5730\u5740\u901a\u8fc7\u6570\u7ec4\u5bf9\u8c61\u57fa\u5730\u5740base\u4e0e\u4e0b\u6807\u76f8\u52a0\u5f97\u5230\uff0c\u7528\u4e8e\u8bbf\u95ee\u6570\u636e\u3002 Java\u6570\u7ec4\u7d22\u5f15\u5b9e\u73b0 Java\u6570\u7ec4\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u96c6\u5408\u3002\u6570\u7ec4\u7d22\u5f15\u5141\u8bb8\u6211\u4eec\u901a\u8fc7\u6570\u7ec4\u4e0b\u6807\u6765\u8bbf\u95ee\u548c\u64cd\u4f5c\u5355\u4e2a\u5143\u7d20\u3002 \u5b9e\u73b0\u673a\u5236 Java\u6570\u7ec4\u672c\u8d28\u4e0a\u662f\u5bf9\u8c61\uff0c\u7531\u8fd0\u884c\u65f6\u73af\u5883\uff08JRE\uff09\u7ba1\u7406\u3002\u6570\u7ec4\u7684\u7d22\u5f15\u5b9e\u9645\u4e0a\u662f\u6570\u7ec4\u5bf9\u8c61\u4e2d\u4e00\u4e2a\u540d\u4e3alength\u7684\u5185\u90e8\u5b57\u6bb5\uff0c\u8be5\u5b57\u6bb5\u8868\u793a\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u5728JVM\u4e2d\uff0c\u6570\u7ec4\u88ab\u5b58\u50a8\u4e3a\u8fde\u7eed\u7684\u5185\u5b58\u5757\uff0c\u6bcf\u4e2a\u5143\u7d20\u5360\u7528\u56fa\u5b9a\u7684\u5185\u5b58\u7a7a\u95f4\u3002\u6570\u7ec4\u5143\u7d20\u7684\u57fa\u5730\u5740\u5b58\u50a8\u5728\u6570\u7ec4\u5bf9\u8c61\u7684base\u5b57\u6bb5\u4e2d\u3002 \u5f53\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20\u65f6\uff0cJava\u7f16\u8bd1\u5668\u4f1a\u5c06\u6570\u7ec4\u4e0b\u6807\u4e0ebase\u5b57\u6bb5\u76f8\u52a0\uff0c\u5f97\u5230\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u7684\u5b9e\u9645\u5730\u5740\u3002\u7136\u540e\uff0c\u4f7f\u7528\u6b64\u5730\u5740\u6765\u8bbf\u95ee\u76f8\u5e94\u7684\u6570\u636e\u3002 \u793a\u4f8b \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3anums\u7684\u6574\u6570\u6570\u7ec4\uff0c\u5305\u542b5\u4e2a\u5143\u7d20\uff1a int[] nums = {1, 2, 3, 4, 5}; \u767b\u5f55\u540e\u590d\u5236 \u5f53\u6211\u4eec\u8bbf\u95ee\u6570\u7ec4\u5143\u7d20nums[2]\u65f6\uff0c\u7f16\u8bd1\u5668\u4f1a\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a \u4ecenums\u6570\u7ec4\u5bf9\u8c61\u4e2d\u83b7\u53d6length\u5b57\u6bb5\u7684\u503c\uff0c\u5373\u6570\u7ec4\u5143\u7d20\u7684\u6570\u91cf\u3002 \u5c06\u6570\u7ec4\u4e0b\u68072\u4e0ebase\u5b57\u6bb5\u76f8\u52a0\uff0c\u5f97\u5230\u5143\u7d20\u5728\u5185\u5b58\u4e2d\u7684\u5730\u5740\u3002 \u4f7f\u7528\u6b64\u5730\u5740\u83b7\u53d6\u5143\u7d20\u503c3\u3002 \u6ce8\u610f\u4e8b\u9879 \u6570\u7ec4\u4e0b\u6807\u662f\u4ece0\u5f00\u59cb\u7684\uff0c\u56e0\u6b64\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u4e0b\u6807\u603b\u662flength-1\u3002 \u5c1d\u8bd5\u8bbf\u95ee\u8d85\u51fa\u6570\u7ec4\u8303\u56f4\u7684\u4e0b\u6807\uff08\u8d1f\u6570\u6216\u5927\u4e8e\u6216\u7b49\u4e8elength\uff09\u4f1a\u5bfc\u81f4ArrayIndexOutOfBoundsException\u3002 \u53ef\u4ee5\u4f7f\u7528length\u5b57\u6bb5\u83b7\u53d6\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002 \u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u7d22\u5f15\u600e\u4e48\u5b9e\u73b0\u7684\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-37503","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37503","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=37503"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37503\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}