Basic Interface Problem(BKash) in Java.

Main Class:

 

package bkash;

public class BKash

{

    public static void main(String[] args)

    {

        PaymentEngine PE = new PaymentEngine();

        BKashPayment BKP = new BKashPayment();

        CashPayment CP = new CashPayment();

             

        PE.accept(BKP);

        PE.accept(CP);            

    }  

}

 

Interface Class:

 

package bkash;

 

public interface Payment 

{

    long getAmount();

}

 

BKashPayment Class:

 

package bkash;

 

public class BKashPayment implements Payment 

{

    @Override

    public long getAmount()

    {

        System.out.println("Taking BKash Payment");

        return 100;

    }

    

}

 

CashPayment Class:

 

package bkash;

 

public class CashPayment implements Payment

{

    @Override

    public long getAmount()

    {

        System.out.println("Taking Cash Payment");

        return 500;

    }

}

 

PaymentEngine Class:

 

package bkash;

 

public class PaymentEngine 

{

    public void accept(Payment p)

    {

        System.out.println("Acceppting Payment: "+p.getAmount());

    }

    

}