Abstract Factory Design Pattern

interface PaymentFactory {
    PaymentProcessor createPaymentProcessor();
    PaymentGateway createPaymentGateway();
}

interface PaymentProcessor {
    void processPayment(double amount);
}

class CreditCardProcessor implements PaymentProcessor {
    @Override
    public void processPayment(double amount) {
        System.out.println("Processing credit card payment of $" + amount);
    }
}

class PayPalProcessor implements PaymentProcessor {
    @Override
    public void processPayment(double amount) {
        System.out.println("Processing PayPal payment of $" + amount);
    }
}

interface PaymentGateway {
    void connect();
}

class BankPaymentGateway implements PaymentGateway {
    @Override
    public void connect() {
        System.out.println("Connecting to bank payment gateway");
    }
}

class PayPalGateway implements PaymentGateway {
    @Override
    public void connect() {
        System.out.println("Connecting to PayPal gateway");
    }
}

class CreditCardPaymentFactory implements PaymentFactory {
    @Override
    public PaymentProcessor createPaymentProcessor() {
        return new CreditCardProcessor();
    }

    @Override
    public PaymentGateway createPaymentGateway() {
        return new BankPaymentGateway();
    }
}

class PayPalPaymentFactory implements PaymentFactory {
    @Override
    public PaymentProcessor createPaymentProcessor() {
        return new PayPalProcessor();
    }

    @Override
    public PaymentGateway createPaymentGateway() {
        return new PayPalGateway();
    }
}

public class Main {
    public static void main(String[] args) {
        PaymentFactory creditCardFactory = new CreditCardPaymentFactory();
        PaymentProcessor creditCardProcessor = creditCardFactory.createPaymentProcessor();
        PaymentGateway bankGateway = creditCardFactory.createPaymentGateway();

        creditCardProcessor.processPayment(100.0);
        bankGateway.connect();

        PaymentFactory payPalFactory = new PayPalPaymentFactory();
        PaymentProcessor payPalProcessor = payPalFactory.createPaymentProcessor();
        PaymentGateway payPalGateway = payPalFactory.createPaymentGateway();

        payPalProcessor.processPayment(50.0);
        payPalGateway.connect();
    }
}