Arrays, Loops, and Layout Managers Using External Classes - Java Programming: Comprehensive Concepts and Techniques - page 314

After the actionPerformed() method is executed, a clearFields() method will
reset all of the input values so that the user can enter a reservation for the next
customer.
The Rooms class creates a room object. Figure 5-5 displays an object-
structure diagram that illustrates the attributes and methods of the Rooms
object.

:Button

Rooms() name

Number of nonsmoking rooms
Number of smoking rooms
Array of available rooms

data and attributes

bookRoom()
Rooms()

methods

FIGURE 5-5

As shown in Table 5-5, the Rooms class will use two methods, each of which
accepts passed parameters and returns a value. The Rooms() constructor method
allows driver classes to create instances of the Rooms object. The bookRoom()
method allows driver classes to book each room.

Table 5-5 Methods for the Rooms Class

PARAMETERS PASSED

METHOD NAME TO METHOD RETURN VALUE PURPOSE

Rooms() int non Has no return data type but A constructor method called by

int sm creates a Rooms object internally driver classes to create an instance

of an array of rooms, identifying
through passed parameters the
number of nonsmoking and
smoking rooms in the array

bookRoom() boolean smoking A method that returns an int An instance method called by driver

classes to obtain a room number
(zero for no room available)