Main.scala

// Main.scala
class C {
  var x = 0
}

object Main extends App {
  val c = new C()
  println("c = " + c.x)
}

// Disassembled C.class
$ javap C
Compiled from "Main.scala"
public class C extends java.lang.Object{
    public int x();
    public void x_$eq(int);
    public C();
}