Java Program that computes the sum of the digits in an integer

Code:

import java.util.*;

public class SumDigits

{

       public static void main(String[] args)

       {

            long ln;

            System.out.print("Enter an integer: ");

            Scanner s = new Scanner(System.in);

            ln = s.nextLong();

            int sum=sumDigits(ln);

            System.out.println(" Sum of the digits in " + ln + " is " +sum);

        }

     public static int sumDigits(long n)

     { 

         int a=0;

         while (n!=0)

         {

              a+=n%10;

              n=n/10;

         }

         return a;

      }

}

Output: