Question

im struggling with abit of java code.

Currently i have 8 rooms

    room1 = new Room(1,1);
    room2 = new Room(2,1);
    room3 = new Room(3,1);
    room4 = new Room(4,1);
    room5 = new Room(5,2);
    room6 = new Room(6,2);
    room7 = new Room(7,3);
    room8 = new Room(8,3);

Now i need to make it so that the user inputs a number 1 to 8 regarding the room they require, then the system needs to add that number to the prefix room so that i can call methods of the desired room.

I currently have this code to receive the selection

roomselect = scan.nextInt();

and then this is where i get stuck as im unsure how to add roomselect integer onto the prefix ‘room’

thanks

Answer 1

Just use arrays:

// Create an array of Rooms
Room rooms[] = new Room[8];
// Now, you have a placeholder for 8 rooms
// Know that it are simply placeholders, the rooms are not initialized.
// Each element of the array is initialized to null

// Assigning
rooms[2] = new Room(3, 2); // Initialize the room at index 2 (which is the 3th 
                           // in spoken language)


// Retrieving
int index = 4; // Indices start at 0
Room room4 = rooms[index];

// Or...
rooms[5].doSomething();


// Getting the length
int numberOfRooms = rooms.length;

So, to solve your case:

int roomselect = scan.nextInt();
Room selectedRoom = rooms[roomselect];