{"id":65467,"date":"2025-05-03T17:22:59","date_gmt":"2025-05-03T09:22:59","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65467\/"},"modified":"2025-05-03T17:22:59","modified_gmt":"2025-05-03T09:22:59","slug":"java%e6%80%8e%e4%b9%88%e5%88%a4%e6%96%ad%e6%95%b0%e7%bb%84%e7%9a%84%e4%b8%8b%e6%a0%87-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65467\/","title":{"rendered":"java\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u7684\u4e0b\u6807"},"content":{"rendered":"<blockquote><p>\n  \u5224\u65ad java \u6570\u7ec4\u4e0b\u6807\u662f\u5426\u6709\u6548\u7684\u65b9\u6cd5\u6709\u4e24\u79cd\uff1a\u4f7f\u7528\u6570\u7ec4\u5bf9\u8c61 length \u5c5e\u6027\uff0c\u5224\u65ad\u4e0b\u6807\u662f\u5426\u5c0f\u4e8e length \u5c5e\u6027\u3002\u4f7f\u7528\u5f02\u5e38\u5904\u7406\uff0c\u6355\u83b7 indexoutofboundsexception \u5f02\u5e38\uff0c\u5224\u65ad\u4e0b\u6807\u662f\u5426\u65e0\u6548\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111301395064481.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u7684\u4e0b\u6807\u63d2\u56fe\" alt=\"java\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u7684\u4e0b\u6807\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5224\u65ad Java \u6570\u7ec4\u7684\u4e0b\u6807<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u6570\u7ec4\u5bf9\u8c61\u548c\u4e0b\u6807\u6765\u8bbf\u95ee\u548c\u64cd\u4f5c\u6570\u7ec4\u5143\u7d20\u3002\u5224\u65ad\u6570\u7ec4\u4e0b\u6807\u7684\u65b9\u6cd5\u975e\u5e38\u7b80\u5355\uff1a<\/p>\n<p><strong>\u4f7f\u7528\u6570\u7ec4\u5bf9\u8c61<\/strong><\/p>\n<ul>\n<li> <strong>length<\/strong> \u5c5e\u6027\uff1a\u6570\u7ec4\u5bf9\u8c61\u63d0\u4f9b\u4e86\u4e00\u4e2a length \u5c5e\u6027\uff0c\u5b83\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u60a8\u53ef\u4ee5\u901a\u8fc7\u6bd4\u8f83\u4e0b\u6807\u503c\u662f\u5426\u5c0f\u4e8e length \u5c5e\u6027\u6765\u5224\u65ad\u4e0b\u6807\u662f\u5426\u6709\u6548\u3002<\/li>\n<\/ul>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint index = 3;\n\nif (index &lt; arr.length) {\n    \/\/ \u4e0b\u6807\u6709\u6548\n} else {\n    \/\/ \u4e0b\u6807\u65e0\u6548\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u4f7f\u7528\u5f02\u5e38\u5904\u7406<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li> <strong>IndexOutOfBoundsException<\/strong> \u5f02\u5e38\uff1a\u5982\u679c\u60a8\u5c1d\u8bd5\u8bbf\u95ee\u6570\u7ec4\u4e2d\u4e0d\u5b58\u5728\u7684\u4e0b\u6807\u5143\u7d20\uff0c\u5c06\u4f1a\u629b\u51fa IndexOutOfBoundsException \u5f02\u5e38\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 try-catch \u8bed\u53e5\u6765\u6355\u83b7\u6b64\u5f02\u5e38\u5e76\u5224\u65ad\u4e0b\u6807\u662f\u5426\u65e0\u6548\u3002<\/li>\n<\/ul>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint index = 5;\n\ntry {\n    \/\/ \u8bbf\u95ee\u4e0d\u5b58\u5728\u7684\u4e0b\u6807\u5143\u7d20\n    int element = arr[index];\n} catch (IndexOutOfBoundsException e) {\n    \/\/ \u4e0b\u6807\u65e0\u6548\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u5176\u4ed6\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n<ul>\n<li>\u6570\u7ec4\u4e0b\u6807\u4ece 0 \u5f00\u59cb\uff0c\u56e0\u6b64\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u4e0b\u6807\u662f 0\uff0c\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u4e0b\u6807\u662f length &#8211; 1\u3002<\/li>\n<li>\u8bbf\u95ee\u8d1f\u4e0b\u6807\u6216\u5927\u4e8e\u6216\u7b49\u4e8e length \u7684\u4e0b\u6807\u4f1a\u5bfc\u81f4 IndexOutOfBoundsException \u5f02\u5e38\u3002<\/li>\n<li>\u60a8\u53ef\u4ee5\u4f7f\u7528 for-each \u5faa\u73af\u6765\u904d\u5386\u6570\u7ec4\uff0c\u8be5\u5faa\u73af\u4f1a\u81ea\u52a8\u8fed\u4ee3\u6240\u6709\u6709\u6548\u4e0b\u6807\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u7684\u4e0b\u6807\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\u4e0b\u6807\u662f\u5426\u6709\u6548\u7684\u65b9\u6cd5\u6709\u4e24\u79cd\uff1a\u4f7f\u7528\u6570\u7ec4\u5bf9\u8c61 length \u5c5e\u6027\uff0c\u5224\u65ad\u4e0b\u6807\u662f\u5426\u5c0f\u4e8e length \u5c5e\u6027\u3002\u4f7f\u7528\u5f02\u5e38\u5904\u7406\uff0c\u6355\u83b7 indexoutofboundsexception \u5f02\u5e38\uff0c\u5224\u65ad\u4e0b\u6807\u662f\u5426\u65e0\u6548\u3002 \u5982\u4f55\u5224\u65ad Java \u6570\u7ec4\u7684\u4e0b\u6807 \u5728 Java \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u6570\u7ec4\u5bf9\u8c61\u548c\u4e0b\u6807\u6765\u8bbf\u95ee\u548c\u64cd\u4f5c\u6570\u7ec4\u5143\u7d20\u3002\u5224\u65ad\u6570\u7ec4\u4e0b\u6807\u7684\u65b9\u6cd5\u975e\u5e38\u7b80\u5355\uff1a \u4f7f\u7528\u6570\u7ec4\u5bf9\u8c61 length \u5c5e\u6027\uff1a\u6570\u7ec4\u5bf9\u8c61\u63d0\u4f9b\u4e86\u4e00\u4e2a length \u5c5e\u6027\uff0c\u5b83\u8fd4\u56de\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002\u60a8\u53ef\u4ee5\u901a\u8fc7\u6bd4\u8f83\u4e0b\u6807\u503c\u662f\u5426\u5c0f\u4e8e length \u5c5e\u6027\u6765\u5224\u65ad\u4e0b\u6807\u662f\u5426\u6709\u6548\u3002 int[] arr = {1, 2, 3, 4, 5}; int index = 3; if (index &lt; arr.length) { \/\/ \u4e0b\u6807\u6709\u6548 } else { \/\/ \u4e0b\u6807\u65e0\u6548 } \u767b\u5f55\u540e\u590d\u5236 \u4f7f\u7528\u5f02\u5e38\u5904\u7406 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b IndexOutOfBoundsException \u5f02\u5e38\uff1a\u5982\u679c\u60a8\u5c1d\u8bd5\u8bbf\u95ee\u6570\u7ec4\u4e2d\u4e0d\u5b58\u5728\u7684\u4e0b\u6807\u5143\u7d20\uff0c\u5c06\u4f1a\u629b\u51fa IndexOutOfBoundsException \u5f02\u5e38\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 try-catch [&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-65467","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65467","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=65467"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65467\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65467"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65467"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65467"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}