//Task-4:Abstraction
 
abstract class Payment {
 
    abstract void makePayment(double amount);
}
class CreditCardPayment extends Payment {
 
    @Override
    void makePayment(double amount) {
        System.out.println("Payment of " + amount + " made using Credit Card.");
    }
}
 
class UPIPayment extends Payment {
 
    @Override
    void makePayment(double amount) {
        System.out.println("Payment of " + amount + " made using UPI.");
    }
}
 
public class Main
{
	public static void main(String[] args) {
	    Payment p;
 
        p = new CreditCardPayment();
        p.makePayment(5000);
 
        p = new UPIPayment();
        p.makePayment(2000);
	}
}

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