1.8 Is Rotation

标签：style   blog   io   color   sp   on   div   log   bs   

Assume you have a method isSubstring which checks if one word is a
substring of another. Given two strings, s1 and s2, write code to check if s2 is
a rotation of s1 using only one call to isSubstring (e.g.,"waterbottle"is a rotation
of "erbottlewat").

1 public static boolean isRotation(String s1, String s2) {
2     if(s1 == null || s2 == null)    return false;
3     if(s1.length() != s2.length())    return false;
4 
5     String s3 = s1 + s1;
6     return isSubstring(s3, s2);
7 }

1.8 Is Rotation

标签：style   blog   io   color   sp   on   div   log   bs   

原文地址：http://www.cnblogs.com/superbo/p/4112790.html