String Rotation in Java

1import java.util.Scanner;
2
3public class Main {
4    public static void main(String[] args) {
5        Scanner sc = new Scanner(System.in);
6        System.out.print("Enter first string: ");
7        String s1 = sc.nextLine();
8        System.out.print("Enter second string: ");
9        String s2 = sc.nextLine();
10
11        if (s1.length() == s2.length() && (s1 + s1).contains(s2)) {
12            System.out.println("Rotation");
13        } else {
14            System.out.println("Not Rotation");
15        }
16        sc.close();
17    }
18}