Write a code to check whether one string is a rotation of another?

File: RotationString .java

public class RotationString {
	public static boolean checkRotation(String st1, String st2) {
		if (st1.length() != st2.length()) {
			return false;
		}
		String st3 = st1 + st1;
		if (st3.contains(st2))
			return true;
		else
			return false;
	}
 
	public static void main(String[] args) {
		String str1 = "avajava";
		String str2 = "javaava";
		System.out.println("Checking if a string is rotation of another");
		if (checkRotation(str1, str2)) {
			System.out.println("Yes " + str2 + " is rotation of " + str1);
		} else {
			System.out.println("No " + str2 + " is not rotation of " + str1);
		}
	}
}

Output:

Checking if a string is rotation of another
Yes javaava is rotation of avajavaw

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