{"id":64243,"date":"2025-05-03T12:40:25","date_gmt":"2025-05-03T04:40:25","guid":{"rendered":"https:\/\/fwq.ai\/blog\/64243\/"},"modified":"2025-05-03T12:40:25","modified_gmt":"2025-05-03T04:40:25","slug":"java%e6%95%b0%e7%bb%84%e6%9c%80%e5%90%8e%e4%b8%80%e4%bd%8d%e6%80%8e%e4%b9%88%e8%a1%a8%e7%a4%ba-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/64243\/","title":{"rendered":"Java\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u600e\u4e48\u8868\u793a"},"content":{"rendered":"<blockquote><p>\n  \u5728java\u4e2d\uff0c\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u7b49\u4e8e\u6570\u7ec4\u957f\u5ea6\u51cf\u4e00\u3002\u56e0\u6b64\uff0c\u5bf9\u4e8e\u957f\u5ea6\u4e3an\u7684\u6570\u7ec4\uff0c\u5176\u6700\u540e\u4e00\u4f4d\u7684\u7d22\u5f15\u4e3an-1\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/03\/2024110301341645757.jpg\" class=\"aligncenter\" title=\"Java\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u600e\u4e48\u8868\u793a\u63d2\u56fe\" alt=\"Java\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u600e\u4e48\u8868\u793a\u63d2\u56fe\" \/><\/p>\n<p><strong>Java\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u5982\u4f55\u8868\u793a\uff1f<\/strong><\/p>\n<p>\u5728Java\u4e2d\uff0c\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u7b49\u4e8e\u6570\u7ec4\u7684\u957f\u5ea6\u51cf\u4e00\u3002\u56e0\u6b64\uff0c\u5bf9\u4e8e\u7ed9\u5b9a\u957f\u5ea6\u4e3an\u7684\u6570\u7ec4arr\uff0c\u5176\u6700\u540e\u4e00\u4f4d\u7684\u7d22\u5f15\u4e3an-1\u3002<\/p>\n<p><strong>\u8be6\u7ec6\u89e3\u91ca\uff1a<\/strong><\/p>\n<p>\u6570\u7ec4\u5728\u8ba1\u7b97\u673a\u5185\u5b58\u4e2d\u5b58\u50a8\u4e3a\u8fde\u7eed\u5185\u5b58\u5757\uff0c\u6bcf\u4e2a\u5143\u7d20\u5360\u7528\u56fa\u5b9a\u5927\u5c0f\u7684\u7a7a\u95f4\u3002\u6570\u7ec4\u7684\u7d22\u5f15\u4ece0\u5f00\u59cb\uff0c\u5e76\u8fde\u7eed\u9012\u589e\u3002\u56e0\u6b64\uff0c\u6570\u7ec4\u4e2d\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u4e3a0\uff0c\u800c\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u4e3a\u6570\u7ec4\u957f\u5ea6\u51cf\u4e00\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u4f8b\u5982\uff0c\u5bf9\u4e8e\u957f\u5ea6\u4e3a5\u7684\u6570\u7ec4arr\uff0c\u5176\u5143\u7d20\u7d22\u5f15\u5206\u522b\u4e3a0\u30011\u30012\u30013\u548c4\u3002\u56e0\u6b64\uff0c\u6700\u540e\u4e00\u4f4d\u5143\u7d20\u7684\u7d22\u5f15\u4e3a4\u3002<\/p>\n<p><strong>\u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>int[] arr = {1, 2, 3, 4, 5};\nint lastIndex = arr.length - 1;\nSystem.out.println(\"\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u7684\u7d22\u5f15\uff1a\" + lastIndex);\nSystem.out.println(\"\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u7684\u503c\uff1a\" + arr[lastIndex]);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8f93\u51fa\uff1a<\/p>\n<pre>\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u7684\u7d22\u5f15\uff1a4\n\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u7684\u503c\uff1a5<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fJava\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u600e\u4e48\u8868\u793a\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>\u5728java\u4e2d\uff0c\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u7b49\u4e8e\u6570\u7ec4\u957f\u5ea6\u51cf\u4e00\u3002\u56e0\u6b64\uff0c\u5bf9\u4e8e\u957f\u5ea6\u4e3an\u7684\u6570\u7ec4\uff0c\u5176\u6700\u540e\u4e00\u4f4d\u7684\u7d22\u5f15\u4e3an-1\u3002 Java\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u5982\u4f55\u8868\u793a\uff1f \u5728Java\u4e2d\uff0c\u6570\u7ec4\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u7b49\u4e8e\u6570\u7ec4\u7684\u957f\u5ea6\u51cf\u4e00\u3002\u56e0\u6b64\uff0c\u5bf9\u4e8e\u7ed9\u5b9a\u957f\u5ea6\u4e3an\u7684\u6570\u7ec4arr\uff0c\u5176\u6700\u540e\u4e00\u4f4d\u7684\u7d22\u5f15\u4e3an-1\u3002 \u8be6\u7ec6\u89e3\u91ca\uff1a \u6570\u7ec4\u5728\u8ba1\u7b97\u673a\u5185\u5b58\u4e2d\u5b58\u50a8\u4e3a\u8fde\u7eed\u5185\u5b58\u5757\uff0c\u6bcf\u4e2a\u5143\u7d20\u5360\u7528\u56fa\u5b9a\u5927\u5c0f\u7684\u7a7a\u95f4\u3002\u6570\u7ec4\u7684\u7d22\u5f15\u4ece0\u5f00\u59cb\uff0c\u5e76\u8fde\u7eed\u9012\u589e\u3002\u56e0\u6b64\uff0c\u6570\u7ec4\u4e2d\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u4e3a0\uff0c\u800c\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u4e3a\u6570\u7ec4\u957f\u5ea6\u51cf\u4e00\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4f8b\u5982\uff0c\u5bf9\u4e8e\u957f\u5ea6\u4e3a5\u7684\u6570\u7ec4arr\uff0c\u5176\u5143\u7d20\u7d22\u5f15\u5206\u522b\u4e3a0\u30011\u30012\u30013\u548c4\u3002\u56e0\u6b64\uff0c\u6700\u540e\u4e00\u4f4d\u5143\u7d20\u7684\u7d22\u5f15\u4e3a4\u3002 \u793a\u4f8b\u4ee3\u7801\uff1a int[] arr = {1, 2, 3, 4, 5}; int lastIndex = arr.length &#8211; 1; System.out.println(&#8220;\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u7684\u7d22\u5f15\uff1a&#8221; + lastIndex); System.out.println(&#8220;\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u7684\u503c\uff1a&#8221; + arr[lastIndex]); \u767b\u5f55\u540e\u590d\u5236 \u8f93\u51fa\uff1a \u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u7684\u7d22\u5f15\uff1a4 \u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u7684\u503c\uff1a5 \u767b\u5f55\u540e\u590d\u5236 \u4ee5\u4e0a\u5c31\u662fJava\u6570\u7ec4\u6700\u540e\u4e00\u4f4d\u600e\u4e48\u8868\u793a\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-64243","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64243","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=64243"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/64243\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=64243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=64243"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=64243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}