JAVA Help

import java.util.*;
class AdamNo
{
    int reverse(int n)      //indentifier(int) should be there even in parameter 
    {
        int a,rev=0,dup=n;
        while (dup>0)
        {
            a=dup%10;
            rev=rev*10+a;
            dup=dup/10;
        }
        return rev;
    }
    public static void main()
    {
        AdamNo obj=new AdamNo();
        Scanner s=new Scanner(System.in);
        System.out.println("Enter a no.");
        int n=s.nextInt();
        int r=obj.reverse(n);
        if ((n*n)==obj.reverse(r*r))
        System.out.println(n+" is Adam No.");
        else
        System.out.println(n+" is not Adam No.");
    }
}