Render swing with graphics class

Question

Can you render components swing through a Graphics object?

I have a structure like this in my class:

public void render(Graphics g) {
    //Render stuff
}

Is it possible to create an object swing, and for that object to render i using the Graphics object?

Answer 1

sure, absolutely possible.

public class MyClass extends JComponent {
  //...
  @Override
  protected void paintComponent(Graphics g) {
    super.paintComponent(g);
    render(g);
  }
}

Answer 2

I take it, you want to draw, but not to the screen. One can create a BufferedImage (or read a background image) and create a Graphics2D object with which to draw.

File imgFile = new File("scenery.png");
BufferedImage img = ImageIO.read(imgFile);
Graphics2D g = img.createGraphics();

render(g);

g.dispose();
ImageIO.write(img, "png", imgFile);

Not to forget the g.dispose() to releast native drawing state.