Java

OOP GUIDE / WORK

ROOM CLASS SOLUTIONS

TASK – PART 1 – ROOM CLASS

Here is my solution:

public class Room

{

private int roomNo;

private String roomType;

private double roomArea;

private boolean hasVentilation;

public Room (int rn, String rt, double ra, boolean hv)

{

roomNo = rn;

roomType = rt;

roomArea = ra; //assuming it is positive

hasVentilation = hv;

}

public Room(int rn, String rt, double length, double width, boolean hv)

{

this(rn, rt, length*width, hv); //calls other constructor

}

public String toString()

{

String ventilationState;

if (hasVentilation == true)

ventilationState = "ventilated";

else

ventilationState = "not ventilated";

return "Room " + roomNo + ", " + roomType + ", " +

roomArea + " sqmeters, " + ventilationState;

}

public void setRoomNo(int number)

{

roomNo = number;

}

public void setRoomType(String tRoomType)

{

roomType = tRoomType;

}

public void setHasVentilation(boolean ventilation)

{

hasVentilation = ventilation;

}

public void setRoomArea(double area)

{

if (area >= 0)

roomArea = area;

}

public int getRoomNo()

{

return roomNo;

}

public String getRoomType()

{

return roomType;

}

public double getRoomArea()

{

return roomArea;

}

public boolean getHasVentilation()

{

return hasVentilation;

}

}

TASK – PART 2 – ROOMTESTER CLASS

Here is my solution:

public class RoomTester

{

public static void main(String[] args)

{

Room r1 = new Room(101, "classroom", 80, true); //con #1

System.out.println(r1);

Room r2 = new Room(103, "office", 3, 4, false); //con #2

System.out.println(r2);

//Testing get methods

System.out.println(r1.getRoomNo());

System.out.println(r1.getRoomType());

System.out.println(r1.getRoomArea());

System.out.println(r1.getHasVentilation());

//Testing set methods

r1.setRoomNo(505);

r1.setRoomType("cool classroom");

r1.setHasVentilation(false);

System.out.println(r1);

//Testing setRoomArea

r1.setRoomArea(-10); //should not change area

System.out.println(r1.getRoomArea());

r1.setRoomArea(78);

System.out.println(r1.getRoomArea());

}

}