Question
Programming Project 4.12 asked you to create a PizzaOrder class that stores an order consisting of up to three pizzas. Extend this class with the following methods and constructor:
• public int getNumPizzas() — returns the number of pizzas in the order.
• public Pizza getPizza1() — returns the first pizza in the order or null if
pizza1 is not set.
• public Pizza getPizza2() — returns the second pizza in the order or null
if pizza2 is not set.
• public Pizza getPizza3() — returns the third pizza in the order or null if
pizza3 is not set.
• A copy constructor that takes another PizzaOrder object and makes an
independent copy of its pizzas. This might be useful if using an old order as a
starting point for a new order.
Write a main method to test the new methods. Changing the pizzas in the new order should not change the pizzas in the original order. For example, Pizza pizza1 = // Code to create a large pizza, 1 cheese, 1 ham
Pizza pizza2 = // Code to create a medium pizza, 2 cheese, 2 pepperoni
PizzaOrder order1 = // Code to create an order
order1.setNumPizzas(2); // 2 pizzas in the order
order1.setPizza1(pizza1); // Set first pizza
order1.setPizza2(pizza2); // Set second pizza
double total = order1.calcTotal(); // Should be 18+20 = 38
PizzaOrder order2 = new PizzaOrder(order1); // Use copy constructor
order2.getPizza1().setNumCheeseToppings(3); // Change toppings
double total = order2.calcTotal(); // Should be 22 + 20 = 42
double origTotal = order1.calcTotal(); // Should still be 38
Note that the first three lines of code are incomplete. You must complete them as part of the Programming Project.
Answer
Program:
// Pizza.java
public class Pizza
{
private String pizzaSize;
private int cheeseCount;
private int pepperoniCount;
private int hamCount;
public Pizza()
{
this.pizzaSize = "";
this.cheeseCount = 0;
this.pepperoniCount = 0;
this.hamCount = 0;
}
public Pizza(String pizzaSize, int cheeseCount,
int pepperoniCount, int hamCount)
{
this.pizzaSize = pizzaSize;
this.cheeseCount = cheeseCount;
this.pepperoniCount = pepperoniCount;
this.hamCount = hamCount;
}
public Pizza(Pizza piz)
{
if(piz == null)
return;
this.pizzaSize = piz.pizzaSize;
this.cheeseCount = piz.cheeseCount;
this.pepperoniCount = piz.pepperoniCount;
this.hamCount = piz.hamCount;
}
public String getPizzaSize()
{
return pizzaSize;
}
public void setPizzaSize(String pizzaSize)
{
this.pizzaSize = pizzaSize;
}
public int getNumCheeseToppings()
{
return cheeseCount;
}
public void setNumCheeseToppings(int cheeseCount)
{
this.cheeseCount = cheeseCount;
}
public int getNumPepperoniToppings()
{
return pepperoniCount;
}
public void setNumPepperoniToppings(int pepperoniCount)
{
this.pepperoniCount = pepperoniCount;
}
public int getNumHmaToppings()
{
return hamCount;
}
public void setNumHmaToppings(int hamCount)
{
this.hamCount = hamCount;
}
public double calcCost()
{
if(pizzaSize.equalsIgnoreCase("small"))
{
return 10 + (cheeseCount + pepperoniCount + hamCount) * 2;
}
else if(pizzaSize.equalsIgnoreCase("medium"))
{
return 12 + (cheeseCount + pepperoniCount + hamCount) * 2;
}
else if(pizzaSize.equalsIgnoreCase("large"))
{
return 14 + (cheeseCount + pepperoniCount + hamCount) * 2;
}
else
{
return 0.0;
}
}
public String getDescription()
{
return "Pizza size: " + pizzaSize + "\n Cheese toppings: "
+ cheeseCount + "\n Pepperoni toppings: "
+ pepperoniCount + "\n Ham toppings: "
+ hamCount + "\n Pizza cost: $" + calcCost() + "\n";
}
}
// PizzaOrder.java
public class PizzaOrder
{
private int numPizzas;
private Pizza pizza1;
private Pizza pizza2;
private Pizza pizza3;
public PizzaOrder()
{
this.numPizzas = 0;
this.pizza1 = null;
this.pizza2 = null;
this.pizza3 = null;
}
public PizzaOrder(int numPizzas, Pizza pizza1,
Pizza pizza2, Pizza pizza3)
{
setNumPizzas(numPizzas);
setPizza1(pizza1);
setPizza2(pizza2);
setPizza3(pizza3);
}
public PizzaOrder(PizzaOrder order)
{
if(order == null)
return;
numPizzas = order.numPizzas;
if(order.pizza1 == null)
pizza1 = null;
else
pizza1 = new Pizza(order.pizza1);
if(order.pizza2 == null)
pizza2 = null;
else
pizza2 = new Pizza(order.pizza2);
if(order.pizza3 == null)
pizza3 = null;
else
pizza3 = new Pizza(order.pizza3);
}
public void setNumPizzas(int numPizzas)
{
if(numPizzas < 1)
this.numPizzas = 1;
else if(numPizzas > 3)
this.numPizzas = 3;
else
this.numPizzas = numPizzas;
}
public void setPizza1(Pizza pizza1)
{
if(numPizzas >= 1)
this.pizza1 = pizza1;
else
this.pizza1 = null;
}
public void setPizza2(Pizza pizza2)
{
if(numPizzas >= 2)
this.pizza2 = pizza2;
else
this.pizza2 = null;
}
public void setPizza3(Pizza pizza3)
{
if(numPizzas >= 3)
this.pizza3 = pizza3;
else
this.pizza3 = null;
}
public int getNumPizzas()
{
return numPizzas;
}
public Pizza getPizza1()
{
return pizza1;
}
public Pizza getPizza2()
{
return pizza2;
}
public Pizza getPizza3()
{
return pizza3;
}
public double calcTotal()
{
double total = 0.0;
if(pizza1 != null)
total += pizza1.calcCost();
if(pizza2 != null)
total += pizza2.calcCost();
if(pizza3 != null)
total += pizza3.calcCost();
return total;
}
}
// PizzaOrderTest.java
public class PizzaOrderTest
{
public static void main(String[] args)
{
Pizza pizza1 = new Pizza("large", 1, 0, 1);
Pizza pizza2 = new Pizza("medium", 2, 2, 0);
PizzaOrder order1 = new PizzaOrder();
order1.setNumPizzas(2);
order1.setPizza1(pizza1);
order1.setPizza2(pizza2);
double total1 = order1.calcTotal();
System.out.println(order1.getPizza1().getDescription());
System.out.println(order1.getPizza2().getDescription());
System.out.println("Total cost1: $" + total1);
System.out.println();
PizzaOrder order2 = new PizzaOrder(order1);
order2.getPizza1().setNumCheeseToppings(3);
double total2 = order2.calcTotal();
System.out.println(order2.getPizza1().getDescription());
System.out.println(order2.getPizza2().getDescription());
System.out.println("Total cost2: $" + total2);
System.out.println();
double origTotal = order1.calcTotal();
System.out.println("Total cost1: $" + origTotal);
}
}
Output:
Pizza size: large
Cheese toppings: 1
Pepperoni toppings: 0
Ham toppings: 1
Pizza cost: $18.0
Pizza size: medium
Cheese toppings: 2
Pepperoni toppings: 2
Ham toppings: 0
Pizza cost: $20.0
Total cost1: $38.0
Pizza size: large
Cheese toppings: 3
Pepperoni toppings: 0
Ham toppings: 1
Pizza cost: $22.0
Pizza size: medium
Cheese toppings: 2
Pepperoni toppings: 2
Ham toppings: 0
Pizza cost: $20.0
Total cost2: $42.0
Total cost1: $38.0