面試題58 - II. 左旋轉字符串
- 注意考慮完全,比如n越界, 字符串長度等問題~~~
public class Solution {
public String LeftRotateString(String str,int n) {
// 考點是 n的範圍!!!!
if(n <= 0 || str.length()<=1) return str;
int n1 = n % str.length();
return str.substring(n1, str.length()) + str.substring(0,n1);
}
}