Exercise Set 2, question 6

protected void move()
{
  Location current = location();

  super.move();

  if (current.equals(location()))   // Have we moved?
  {
    Random randNumGen = RandNumGenerator.getInstance();

    // If this is the 0.1 chance of turning, turn left or right
    if (randNumGen.nextDouble() < probOfTurning)
    {
      turnRightOrLeft(direction());
      Debug.println(" Turned and now facing " + direction());
      return location();
    }
  }
}

/** Turns this fish right or left
 **/
protected void turnRightOrLeft(Direction dir)
{
  Random randNumGen = RandNumGenerator.getInstance();
  if (randNumGen.nextDouble() < probOfRight)
  {
    changeDirection(dir.toRight());
  }
  else
  {
    changeDirection(dir.toLeft());
  }
}