Answer to Question #255973 in Java | JSP | JSF for Rasel Sheikh

Question

4. A Java interface can only contain method signatures and fields. The interface can be used 

to achieve polymorphism. In this problem, you will practice your knowledge on interfaces.

You are given an interface AdvancedArithmetic which contains a method signature int 

divisor_sum(int n). You need to write a class called MyCalculator which implements the 

interface.

divisorSum method just takes an integer as input and return the sum of all its divisors. For 

example divisors of 6 are 1, 2, 3 and 6, so divisor_sum should return 12. The value of n will be 

at most 1000.

Answer 1

import java.util.Scanner;
interface AdvancedArithmetic {
  int divisor_sum(int n);
}


public class Main
{
	public static void main(String[] args) {
	    System.out.println("Enter n: ");
	    Scanner in = new Scanner(System.in);
        int n = in.nextInt();
		MyCalculator c = new MyCalculator();
		System.out.println(c.divisor_sum(n) + "\n");
	}
}


class MyCalculator implements AdvancedArithmetic{
    
    public int divisor_sum(int n){
        int sum1 = 1;
        for (int i=2;i<=n;i++){
            if (n%i == 0){
                sum1 = sum1 + i;
            }
        }
        return sum1;
    }
}