{"id":65466,"date":"2025-05-03T08:37:49","date_gmt":"2025-05-03T00:37:49","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65466\/"},"modified":"2025-05-03T08:37:49","modified_gmt":"2025-05-03T00:37:49","slug":"java%e6%80%8e%e4%b9%88%e5%88%a4%e6%96%ad%e6%95%b0%e7%bb%84%e5%88%b0%e5%a4%b4%e4%ba%86-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65466\/","title":{"rendered":"java\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u5230\u5934\u4e86"},"content":{"rendered":"<blockquote><p>\n  \u5224\u65ad java \u6570\u7ec4\u662f\u5426\u5df2\u5230\u5934\u7684\u65b9\u6cd5\u6709\uff1a\u6570\u7ec4\u957f\u5ea6\u5224\u65ad\uff1a\u901a\u8fc7\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u5e76\u6bd4\u8f83\u5f53\u524d\u7d22\u5f15\u6765\u5224\u65ad\u662f\u5426\u5df2\u8fbe\u672b\u5c3e\u3002\u5faa\u73af\u63a7\u5236\uff1a\u5728\u904d\u5386\u6570\u7ec4\u65f6\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u68c0\u67e5\u7d22\u5f15\u662f\u5426\u5df2\u8fbe\u6570\u7ec4\u957f\u5ea6\u3002\u5f02\u5e38\u5904\u7406\uff1a\u5c1d\u8bd5\u8bbf\u95ee\u4e0d\u5b58\u5728\u7684\u6570\u7ec4\u7d22\u5f15\u4f1a\u629b\u51fa indexoutofboundsexception \u5f02\u5e38\uff0c\u53ef\u901a\u8fc7\u6355\u83b7\u6b64\u5f02\u5e38\u6765\u5224\u65ad\u6570\u7ec4\u662f\u5426\u5df2\u5230\u5934\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111301392116319.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u5230\u5934\u4e86\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u5230\u5934\u4e86\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5224\u65ad Java \u6570\u7ec4\u5df2\u5230\u5934\uff1f<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5224\u65ad\u6570\u7ec4\u662f\u5426\u5df2\u5230\u5934\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u6570\u7ec4\u957f\u5ea6\u5224\u65ad<\/strong><\/p>\n<p>\u4f7f\u7528 length \u5c5e\u6027\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\uff0c\u7136\u540e\u901a\u8fc7\u6bd4\u8f83\u5f53\u524d\u7d22\u5f15\u4e0e\u957f\u5ea6\u6765\u5224\u65ad\u662f\u5426\u5df2\u8fbe\u6570\u7ec4\u672b\u5c3e\u3002\u4f8b\u5982\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] arr = {1, 2, 3};\nint index = 2;\n\nif (index &lt; arr.length) {\n    \/\/ \u6570\u7ec4\u672a\u5230\u5934\n} else {\n    \/\/ \u6570\u7ec4\u5df2\u5230\u5934\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u5faa\u73af\u63a7\u5236<\/strong><\/p>\n<p>\u5728\u5faa\u73af\u904d\u5386\u6570\u7ec4\u65f6\uff0c\u4f7f\u7528 if \u8bed\u53e5\u6761\u4ef6\u6765\u68c0\u67e5\u7d22\u5f15\u662f\u5426\u5df2\u8fbe\u6570\u7ec4\u957f\u5ea6\u3002\u5f53\u6761\u4ef6\u4e0d\u6ee1\u8db3\u65f6\uff0c\u9000\u51fa\u5faa\u73af\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[] arr = {1, 2, 3};\nint i = 0;\n\nwhile (i &lt; arr.length) {\n    \/\/ \u904d\u5386\u6570\u7ec4\u5143\u7d20\n    i++;\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u5f02\u5e38\u5904\u7406<\/strong><\/p>\n<p>\u5c1d\u8bd5\u8bbf\u95ee\u4e0d\u5b58\u5728\u7684\u6570\u7ec4\u7d22\u5f15\u4f1a\u629b\u51fa IndexOutOfBoundsException \u5f02\u5e38\u3002\u53ef\u4ee5\u901a\u8fc7\u6355\u83b7\u6b64\u5f02\u5e38\u6765\u5224\u65ad\u6570\u7ec4\u662f\u5426\u5df2\u5230\u5934\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[] arr = {1, 2, 3};\nint index = 3;\n\ntry {\n    int value = arr[index];\n} catch (IndexOutOfBoundsException e) {\n    \/\/ \u6570\u7ec4\u5df2\u5230\u5934\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u6570\u7ec4\u7d22\u5f15\u662f\u4ece 0 \u5f00\u59cb\u7684\uff0c\u56e0\u6b64\u6570\u7ec4\u957f\u5ea6 &#8211; 1 \u662f\u6700\u540e\u4e00\u4e2a\u6709\u6548\u7d22\u5f15\u3002<\/li>\n<li>\u5bf9\u4e8e\u591a\u7ef4\u6570\u7ec4\uff0c\u9700\u8981\u68c0\u67e5\u6bcf\u4e2a\u7ef4\u5ea6\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u5230\u5934\u4e86\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5224\u65ad java \u6570\u7ec4\u662f\u5426\u5df2\u5230\u5934\u7684\u65b9\u6cd5\u6709\uff1a\u6570\u7ec4\u957f\u5ea6\u5224\u65ad\uff1a\u901a\u8fc7\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\u5e76\u6bd4\u8f83\u5f53\u524d\u7d22\u5f15\u6765\u5224\u65ad\u662f\u5426\u5df2\u8fbe\u672b\u5c3e\u3002\u5faa\u73af\u63a7\u5236\uff1a\u5728\u904d\u5386\u6570\u7ec4\u65f6\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u68c0\u67e5\u7d22\u5f15\u662f\u5426\u5df2\u8fbe\u6570\u7ec4\u957f\u5ea6\u3002\u5f02\u5e38\u5904\u7406\uff1a\u5c1d\u8bd5\u8bbf\u95ee\u4e0d\u5b58\u5728\u7684\u6570\u7ec4\u7d22\u5f15\u4f1a\u629b\u51fa indexoutofboundsexception \u5f02\u5e38\uff0c\u53ef\u901a\u8fc7\u6355\u83b7\u6b64\u5f02\u5e38\u6765\u5224\u65ad\u6570\u7ec4\u662f\u5426\u5df2\u5230\u5934\u3002 \u5982\u4f55\u5224\u65ad Java \u6570\u7ec4\u5df2\u5230\u5934\uff1f \u5728 Java \u4e2d\uff0c\u5224\u65ad\u6570\u7ec4\u662f\u5426\u5df2\u5230\u5934\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\uff1a 1. \u6570\u7ec4\u957f\u5ea6\u5224\u65ad \u4f7f\u7528 length \u5c5e\u6027\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6\uff0c\u7136\u540e\u901a\u8fc7\u6bd4\u8f83\u5f53\u524d\u7d22\u5f15\u4e0e\u957f\u5ea6\u6765\u5224\u65ad\u662f\u5426\u5df2\u8fbe\u6570\u7ec4\u672b\u5c3e\u3002\u4f8b\u5982\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] arr = {1, 2, 3}; int index = 2; if (index &lt; arr.length) { \/\/ \u6570\u7ec4\u672a\u5230\u5934 } else { \/\/ \u6570\u7ec4\u5df2\u5230\u5934 } \u767b\u5f55\u540e\u590d\u5236 2. \u5faa\u73af\u63a7\u5236 \u5728\u5faa\u73af\u904d\u5386\u6570\u7ec4\u65f6\uff0c\u4f7f\u7528 if \u8bed\u53e5\u6761\u4ef6\u6765\u68c0\u67e5\u7d22\u5f15\u662f\u5426\u5df2\u8fbe\u6570\u7ec4\u957f\u5ea6\u3002\u5f53\u6761\u4ef6\u4e0d\u6ee1\u8db3\u65f6\uff0c\u9000\u51fa\u5faa\u73af\u3002\u4f8b\u5982\uff1a int[] arr = {1, 2, 3}; int i = [&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-65466","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65466","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=65466"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65466\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65466"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65466"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}