// Concrete decorator class for adding pepperoni
public class PepperoniDecorator extends PizzaDecorator {
    public PepperoniDecorator(Pizza pizza) {
        super(pizza);
    }

    @Override
    public String getDescription() {
        return pizza.getDescription() + ", pepperoni";
    }

    @Override
    public double cost() {
        return pizza.cost() + 2.50;
    }
}