Question

I’m trying to do this in Scala, but for some reason it won’t work

abstract class Room {
 ...
}

class RoomA1 extends Room { //"not found: type Room" 
//but they're in the same package!!!
//and if I import it as Eclipse suggests the import declaration will give 
//"Room is not a member of rooms(rooms.type)"
 ...
}

and also…

var room = new Array[Room](2)
room(0) = new RoomA1 //gives a type mismatch 
//how can I accomplish this?

Answer 1

There’s nothing wrong in your code. Here’s an output of REPL which proves that:

scala> abstract class Room
defined class Room

scala> class RoomA1 extends Room
defined class RoomA1

scala> val room = new Array[Room](2)
room: Array[Room] = Array(null, null)

scala> room(0) = new RoomA1

scala> room
res3: Array[Room] = Array(RoomA1@71c0ef03, null)

scala>

The problem must be in how you placed it in a package, which one, in which file under which directory. You should broaden your question with this info.