面试题58 - II. 左旋转字符串
- 注意考虑完全,比如n越界, 字符串长度等问题~~~
public class Solution {
public String LeftRotateString(String str,int n) {
// 考点是 n的范围!!!!
if(n <= 0 || str.length()<=1) return str;
int n1 = n % str.length();
return str.substring(n1, str.length()) + str.substring(0,n1);
}
}