Sum of the digit and Reverse of Sum

Code:

import java.util.*;
class reverse
{
    public static void main(String []args)
    {
        int a,b,c,reverse=0;
        Scanner in=new Scanner (System.in);
        System.out.print("enter any integer number: ");
        a=in.nextInt();
        int sum=0;
        int n=a;
        while (n!=0)
        {
            int lastdigit=n%10;
            sum +=lastdigit;
            n /=10;   
        }
         System.out.println("sum of the digits is "+sum);
         while(sum!=0)
         {
             reverse=reverse*10;
             reverse=reverse+(sum%10);
             sum=sum/10;
         }
          System.out.println("Reverse of the sum is "+reverse);
    }
}

Output: