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Decorator

Theory

Pizza Decorator

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This fun task involves Pizza decorating. Imagine that the basic ingredients are used, but you want to add something more.

Sample Input 1:

Sample Output 1: 

Vegan $4.99
Vegan, Broccoli, Tomato, Spinach $5.27
MeatHeaven, Ham, Chicken, Cheese $6.70
Write a program in Java 17
import java.util.Locale;

class TestDrive {
public static void main(String[] args) {
Pizza simpleVeganPizza = new Vegan();
System.out.println(simpleVeganPizza.getDescription() + " $" + formatSum(simpleVeganPizza.cost()));

Pizza veganPizzaDecor = new Vegan();
veganPizzaDecor = new Broccoli(/* write your code here */);
veganPizzaDecor = new Tomato(/* write your code here */);
veganPizzaDecor = new Spinach(/* write your code here */);
System.out.println(veganPizzaDecor.getDescription() + " $" + formatSum(veganPizzaDecor.cost()));

Pizza meatPizzaDecor = new MeatHeaven();
meatPizzaDecor = new Ham(/* write your code here */);
meatPizzaDecor = new Chicken(/* write your code here */);
meatPizzaDecor = new Cheese(/* write your code here */);
System.out.println(meatPizzaDecor.getDescription() + " $" + formatSum(meatPizzaDecor.cost()));

}

private static String formatSum(double sum) {
return String.format(Locale.ROOT, "%.2f", sum);
}
}

abstract class Pizza {
String description;

String getDescription() {
return description;
}

abstract double cost();
}

class Vegan extends Pizza {

Vegan() {
description = "Vegan";
}

@Override
double cost() {
return 4.99;
}
}

class MeatHeaven extends Pizza {

MeatHeaven() {
description = "MeatHeaven";
}

@Override
double cost() {
return 4.0;
}
}

abstract class Decorator extends Pizza {
abstract String getDescription();
}

class Ham extends Decorator {
private Pizza pizza;

Ham(Pizza pizza) {
this.pizza = pizza;
}

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

@Override
double cost() {
return 1.0 + pizza.cost();
}
}

class Chicken extends Decorator {

private Pizza pizza;

Chicken(Pizza pizza) {
this.pizza = pizza;
}

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

@Override
double cost() {
return 1.5 + pizza.cost();
}
}

class Cheese extends Decorator {

private Pizza pizza;

Cheese(Pizza pizza) {
this.pizza = pizza;
}

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

@Override
double cost() {
return .20 + pizza.cost();
}
}

class Broccoli extends Decorator {

private Pizza pizza;

Broccoli(Pizza pizza) {
this.pizza = pizza;
}

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

@Override
double cost() {
return .10 + pizza.cost();
}
}

class Tomato extends Decorator {

private Pizza pizza;

Tomato(Pizza pizza) {
this.pizza = pizza;
}

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

@Override
double cost() {
return .09 + pizza.cost();
}
}

class Spinach extends Decorator {

private Pizza pizza;

Spinach(Pizza pizza) {
this.pizza = pizza;
}

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

@Override
double cost() {
return .09 + pizza.cost();
}
}
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