剑指Offer LeetCode 面试题58 - II. 左旋转字符串

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

class Solution {
    public String reverseLeftWords(String s, int n) {
        StringBuilder stringBuilder=new StringBuilder();

        for (int i = n; i < s.length() ; i++) {
            stringBuilder.append(s.charAt(i));
        }

        for (int i = 0; i < n ; i++) {
            stringBuilder.append(s.charAt(i));
        }

        return stringBuilder.toString();
    }
}