切割字符串拼接
左旋转字符串
http://www.nowcoder.com/questionTerminal/12d959b108cb42b1ab72cef4d36af5ec
public class Solution {
public String LeftRotateString(String str,int n) {
if (str == null || str.length() < 1) {
return "";
}
String pre = str.substring(0, n);
String post = str.substring(n);
return post + pre;
}
}
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