Nsryjdtyk

I have two classes, the first is this:

public class Room {



public String typeOfRoom;

public double area;

public int floor;

public int windowsCount;



public String getTypeOfRoom() {

    return typeOfRoom;

}



public double getArea() {

    return area;

}



public int getFloor() {

    return floor;

}



public int getWindowsCount() {

    return windowsCount;

}



public void setTypeOfRoom(String typeOfRoom) {

    this.typeOfRoom = typeOfRoom;

}



public void setArea(double area) {

    this.area = area;

}



public void setFloor(int floor) {

    this.floor = floor;

}



public void setWindowsCount(int windowsCount) {

    this.windowsCount = windowsCount;

}



}

And the second is this:

public class House {



public Address addressOfHouse;

public Room bedroom;

public Room childrenroom;

public Room kitchen;

public Room livingroom;

public Room lobby;

public Room workroom;



public House (){

    addressOfHouse=new Address();

    bedroom=new Room();

    childrenroom=new Room();

    kitchen=new Room();

    livingroom=new Room();

    lobby=new Room();

    workroom=new Room();

}



public double totalArea (int floor){

    double totalArea=1;

    return totalArea;

}



public double totalArea (){

    //Here I do not know how to keep on...

}



}

My problem is that I have to complete the method "public double totalArea(){...}" and I am not sure about how to do it. This method should add all the areas of the rooms that are on the first floor of a house. I do not know exactly how to express it in the method, I do not know what kind of command I should use, I have thought of "if" or "for", but my biggest trouble is about how to express that the total area is the sum of the areas of the rooms on the first floor, if the area has to be set in the Main class and I do not know how to declare the "sum of the areas" in the method... Could you help me with that? If you could just give me some direction, just tell what steps I should follow, send links or something, I would be very glad. I have already looked for the solution of it for two weeks... I hope you have comprehended me. Thank you very much!

Use an ArrayList to save all the Room objects in the House class and iterate through the list and sum the areas:

public class House {



    public Address addressOfHouse;

    public Room bedroom;

    public Room childrenroom;

    public Room kitchen;

    public Room livingroom;

    public Room lobby;

    public Room workroom;

    private ArrayList<Room> rooms;



    public House (){

        addressOfHouse=new Address();



        rooms = new ArrayList<>();



        bedroom=new Room();

        rooms.add(bedroom);

        childrenroom=new Room();

        rooms.add(childrenroom);

        kitchen=new Room();

        rooms.add(kitchen);

        livingroom=new Room();

        rooms.add(livingroom);

        lobby=new Room();

        rooms.add(lobby);

        workroom=new Room();

        rooms.add(workroom);

    }



    public double totalArea (int floor){

        double totalArea=0.0;



        for (Room room : rooms) {

            if (room.getFloor() == floor)

                totalArea += room.getArea();

        }



        return totalArea;

    }



    public double totalArea (){

        return totalArea(1);

    }



}

The totalArea(int floor) method returns the area of i floor.

So if you want the totalArea() method to return the 1st floor's area, you must return totalArea(1).

Maybe you should change the name of totalArea() to totalAreaofFirstFloor()?
All the Room objects in House class need initialization with valid values for their properties.

First of all, you need a Room constructor that accepts parameters (right now you are using the default constructor, so every variable is set to 0/null)

public Room(String typeOfRoom /* ... other params */){ 

   this.typeOfRoom = typeOfRoom;

   //assign other params

}

Then you will need to write the method:

 public double totalArea (int floor){

    double totalArea=0.0;



    //check if bedroom is on this floor:

    if(bedroom.getFloor() == floor) {

       totalArea += bedroom.getArea();

    }

    //now do this for all other rooms



    return totalArea;

}

May be more elegant to colect the rooms in something and iterate through that, but this will do as well.

For computing the overall area for all the floors of all rooms, you can write a method like this,

public double totalArea() {

    double totalArea = 0;

    totalArea += bedroom.getArea();

    totalArea += childrenroom.getArea();

    totalArea += kitchen.getArea();

    totalArea += livingroom.getArea();

    totalArea += lobby.getArea();

    totalArea += workroom.getArea();



    return totalArea;

}

But you should create a proper constructor of Room class, so one can properly create Room object and can specify the parameters into it. Room constructor can be something like this,

public Room(String typeOfRoom, double area, int floor, int windowsCount) {

    this.typeOfRoom = typeOfRoom;

    this.area = area;

    this.floor = floor;

    this.windowsCount = windowsCount;

}

Also, you should create a better constructor of House object, where it can take room objects of various types of room. Your house constructor can be something like this,

public House(Address addressOfHouse, Room bedroom, Room childrenroom, Room kitchen, Room livingroom, Room lobby, Room workroom) {

    this.addressOfHouse = addressOfHouse;

    this.bedroom = bedroom;

    this.childrenroom = childrenroom;

    this.kitchen = kitchen;

    this.livingroom = livingroom;

    this.lobby = lobby;

    this.workroom = workroom;

}

You also need to improve your method for calculating area for a particular floor to something like this,

public double totalArea(int floor) {

    double totalArea = 0;

    totalArea += bedroom.getFloor() == floor ? bedroom.getArea() : 0;

    totalArea += childrenroom.getFloor() == floor ? childrenroom.getArea() : 0;

    totalArea += kitchen.getFloor() == floor ? kitchen.getArea() : 0;

    totalArea += livingroom.getFloor() == floor ? livingroom.getArea() : 0;

    totalArea += lobby.getFloor() == floor ? lobby.getArea() : 0;

    totalArea += workroom.getFloor() == floor ? workroom.getArea() : 0;



    return totalArea;

}

And then finally you can write some code in main method to test how it works,

public static void main(String args) {

    Room bedroom = new Room("bedroom", 200, 1, 4);

    Room childrenroom = new Room("childrenroom", 180, 1, 2);

    Room kitchen = new Room("kitchen", 160, 2, 2);

    Room livingroom = new Room("livingroom", 220, 2, 2);

    Room lobby = new Room("lobby", 140, 2, 4);

    Room workroom = new Room("workroom", 100, 2, 2);

    Address address = new Address();



    House house = new House(address, bedroom, childrenroom, kitchen, livingroom, lobby, workroom);



    // total area of all rooms

    System.out.println("Total area: " + house.totalArea());



    // total area of all rooms on floor 1

    System.out.println("Total area on floor 1: " + house.totalArea(1));



    // total area of all rooms on floor 2

    System.out.println("Total area on floor 2: " + house.totalArea(2));

}

This prints following output like expected,

Total area: 1000.0

Total area on floor 1: 380.0

Total area on floor 2: 620.0

Hope this helps and let me know if you still have any queries further.