Java Reference
In-Depth Information
2.
The UML diagram below shows the relationship between a class called
PizzaOrder
and a class called
Pizza
:
PizzaOrder
-Pizza[MAXPIZZAS]
-numPizzas:
int
+addPizzaToOrder(in
char
size, in
boolean
pepperoni, in
boolean
sausage, in
boolean
mushrooms)
+calcCost( ):
double
1
Pizza
-pepperoni:
boolean
-sausage:
boolean
-mushrooms:
boolean
-size:
boolean
+Pizza(in
char
size, in
boolean
pepperoni, in
boolean
sausage, in
boolean
mushrooms)
+getSize( ):
char
+getNumToppings( ):
int
The word “in” means the parameter is used to deliver data to the method.
The
Pizza
class contains information about a specific pizza. The variables of
pepperoni, sausage, and mushrooms are booleans that indicate whether or not
these toppings are present on the pizza. The size variable is a character of value
's'
,
'm'
, or
'l'
to indicate small, medium, or large. There is also a
Pizza
constructor that initializes all of these values. The
getSize()
method returns the
size of the pizza and the
getNumToppings()
method returns a number from 0-3
depending on what toppings are present (e.g., if the pizza has pepperoni and
mushrooms, it would be 2).
The
PizzaOrder
class contains an array of
Pizza
's. There is a method to add a
new pizza to the array (which increments
numPizzas
) and also a method to
calculate the cost of the entire order. A small pizza costs $8, a medium pizza is
$10, and a large pizza costs $12. Each topping adds $1 to the pizza.
The arrow connecting
PizzaOrder
to
Pizza
indicates that the
PizzaOrder
class
has a reference to the
Pizza
class, but not vice versa. The solid diamond on the
PizzaOrder
class is a UML construct that indicates that the
PizzaOrder
class has
a collection of the
Pizza
class. There may be many (*)
Pizza
's for a single (1)
PizzaOrder
.
Given this information, write Java code that implements the
Pizza
and
PizzaOrder
classes. Also, write a test main function that creates a pizza order,
adds several pizzas to it, and outputs the cost of the order.
