Hacker Rank - Day 19 : Interfaces

                   Day 19 : Interfaces

Solution In Java 8:

import java.io.*;
import java.util.*;

interface AdvancedArithmetic{
   int divisorSum(int n);
}
class Calculator implements AdvancedArithmetic
{
    public int divisorSum(int n)
        {
            int sum=0;
             for(int i=1;i<=n/2;i++)
             {
                 if(n%i==0)
                 {
                     sum=sum+i;
                 }
             }
                return (sum+n);
        }
}
class Solution {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        scan.close();
       
          AdvancedArithmetic myCalculator = new Calculator();
        int sum = myCalculator.divisorSum(n);
        System.out.println("I implemented: " + myCalculator.getClass().getInterfaces()[0].getName() );
        System.out.println(sum);
    }
}