Question

Well I do not understand how it comes that Image class has a constructor of Bitmap type? I mean, I can do:

Image sprite=new Bitmap(...)

Why? Its because Bitmap is derived from Image?

Answer 1

Yes, because Image is abstract, but Bitmap, which extends Image is not. You could just as easily have your code do this instead:

Bitmap sprite = new Bitmap();

The reason why Image is abstract is because it can also represent non-pixel-based images.