2020-11-12-简单-剑指 Offer 58 - II. 左旋转字符串

题目链接:
https://leetcode-cn.com/problems/zuo-xuan-zhuan-zi-fu-chuan-lcof/

  class Solution {
    public String reverseLeftWords(String s, int n) {
          String rightstring=s.substring(0,n);
      String leftstring=s.substring(n,s.length());
      return leftstring+rightstring;
    }
}

字符串切割，拼接