Q1_8.java

public class Q1_8{
	public static void main(String args[]){
		String test1 = "test";
		String test2 = "estt";
		System.out.println(isRotation(test1, test2));
	}
	private static boolean isRotation(String s1, String s2){
		if(s1.length() != s2.length())
		    return false;
		String s= s2+s2;
		if(isSubstring(s1,s))
		    return true;
		else return false;
	}
	
	private static boolean isSubstring(String s1, String s2){
		if(s1.length()> s2.length())
		     return false;
		for(int i = 0; i<=s2.length()-s1.length(); i++){
			if(s2.substring(i,i+s1.length()).equals(s1))
			     return true;
		}
		
		return false;
	}
	
	
}