Design Patterns, Behavioural Design, Java, Software Development.
String cvv) { this.cardNumber = cardNumber; this.expiryDate = expiryDate; this.cvv = cvv; } public void pay(double amount) { // Implement credit card payment logic System.out.println("Paid " + amount + " via credit card."); } } class PayPalPaymentStrategy implements PaymentStrategy { private String