Question

I got two Graphics objects, is it possible to combine them into one?

The answer of Hovercraft Full of Eels is useful, but not what I meant. Say I have two Graphics objects, private Graphics gr1 and private Graphics gr2. Now, how should I merge them in the paintComponent(Graphics) method to draw them to my (for example JPanel)?

The question is not at all about images, but about mere Graphics objects. Sorry, the first paragraph was misleading.

Edit:
In response to Hovercraft Full of Eels:

If you draw in the paintComponent() method, I find it annoying everything is gone if you redraw your screen, and if you want to move something you have to save the coordinates and dimensions of everything, adjust those and get them someway in your Graphics object.
The question I asked myself was accely: What object is best suited or saving a Graphics object. A Graphics object, I thought. but the problem is that if you have (for example) two rectangles, and one moves to the left and one moves to the right you can’t if you have 1 Graphics object.
My solution was multiple graphics objects, which can be transformed to simulate movement and then drawn to the screen.
@Hovercraft Full of Eels I think you (and most SO’ers) think this is not a good solution, looking at your answer.
But, an answer saying You're doing it all wrong, you'd better stop programming doesn’t help me at all, so please give me an alternative.

Answer 1

• To impose images, use an appropriate layout, as shown here.

• To compose images, use an appropriate composite rule, as shown here.

Addendum: @HFOE is correct. An instance of Graphics or Graphics2D, sometimes called a graphics context, is a transitory means to apply rendering methods; the target device or off-screen image must exist independently. Classes implementing the Shape interface are good candidates for encapsulating information about what to render in a given context. AffineTest and GraphPanel are examples.