Render methods

Newbie & Debugging Questions
#1

I’m trying to create my first game in Java and I’ve seen most tutorials using a render method along the following lines:

public void render () {
	BufferStrategy bs = getBufferStrategy();
	if (bs == null) {
		createBufferStrategy(3);
		return;
	}
	Graphics g = bs.getDrawGraphics();
	g.drawImage(image,0,0,getWidth(),getHeight(),null);
	// render stuff
	g.dispose();
	bs.show();
}

I stumbled upon another guide recently using, in my eyes, a more understandable method:

public void paint (Graphics g) {
	super.paint(g);
	Graphics2d g2d = (Graphics2D) g;
	// render stuff
	// repaint() is then used to repaint the window
}

I’m leaning toward this being a case of performance. I too noticed the first paragraph of code, the one I currently use, is with JFrame and the latter one with JPanel. Which one would you recommend?

Thanks for the help!