剑指 Offer 58 - II. 左旋转字符串 发表于 2022-04-13 Substring12345class Solution { public String reverseLeftWords(String s, int n) { return s.substring(n) + s.substring(0, n); }} Iterate12345678910111213class Solution { public String reverseLeftWords(String s, int n) { char[] chars = new char[s.length()]; int j = 0; for (int i = n; i < s.length(); i++) { chars[j++] = s.charAt(i); } for (int i = 0; i < n; i++) { chars[j++] = s.charAt(i); } return new String(chars); }} Reference剑指 Offer 58 - II. 左旋转字符串