题解 | #左旋转字符串#
左旋转字符串
http://www.nowcoder.com/practice/12d959b108cb42b1ab72cef4d36af5ec
import java.lang.*;
public class Solution {
public String LeftRotateString(String str,int n) {
if(str==null||str.length()==0) return "";
if(n==0) return str;
String tmp =str.substring(0,n);
str =str.replace(tmp," ");
str=str+tmp;
String s=str.substring(1,str.length());
return s;
}
} 
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