Java

OOP GUIDE / WORK

ROOM CLASS

Topics

• Instance variables, constructors and instance methods
• Data encapsulation

TASK – PART 1 – ROOM CLASS

You will create a class named Room that will represent a room in a school. Here is the class specification:

INSTANCE VARIABLES

You need to determine the best type for each of the following private instance variables:

• roomNo – The number of the room.
  
  
• roomType – A one-word description of the room such as classroom, washroom or office.
  
  
• roomArea – The area of the room in square meters.
  
  
• hasVentilation – Holds whether the room as ventilation or not.
  
  
  

CONSTRUCTOR

• There is a constructor that gets a value for each instance variable.
  
  
• Optional: There is a 2^nd constructor that gets five parameters. It is similar to the first constructor but instead of getting a value for roomArea, it gets two parameters for width and length of the room. The area is then calculated.

INSTANCE METHODS

Implement the following instance methods:

• toString()
  
  Returns a string similar to
  
  "Room 101, classroom, 56 sqmeters, ventilated"
  
  or
  
  "Room 188, office, 9 sqmeters, not ventilated"
  
  
• Set methods for all four instance variables. The setArea method will only change the area if the provided value is positive. So a negative value will be ignored.
  
  
• Get methods for all four instance variables.

TASK – PART 2 – ROOMTESTER CLASS

Create a RoomTester class. Inside main, create a few Room objects. Test all of the methods in the Room class.