Out of simple curiosity who implements the actual methods that draw? Since the draw(Shape S) from the java.awt.Graphics2D is an abstract method and I heven't been able to find something that implements logic to it.
I got curious!
All the interesting methods of concrete implementations of Graphics/2D are in native code, and the concrete classes themselves are (possibly platform-dependent) proprietary com.sun... classes. Do a sysout of getClass() in a painting method override and you can get the class name. No, you won't find the source of that class in src.zip.
If you're interested in the sequence of painting activities, look at RepaintManager.
The repaint() method merely queues a paint event in the EventQueue.
There are no new questions, but there may be new answers.