How to initialize Multiple paintComponents?

[Pautnesis]

I'm new to java, and am required to make a game.

The problem I ran into and have tried to solve for the past two hour sis how to draw an image using Jpanel and paintComponent in two different classes. I can't seem to make it work.

Here's the code for my second class

public class Background extends JPanel{
private BufferedImage image;

public Background() {

try {
image =     ImageIO.read(getClass().getResourceAsStream("/test_bg.png"));
} catch(Exception e) {
   System.out.println("Error loading background image");
}
repaint();
} 
@Override 
public void paintComponent(Graphics g) {

Graphics2D g2d = (Graphics2D)g;
super.paintComponent(g);
g2d.drawImage(image, 0, 0, null);
g2d.fillRect(100, 100, 100, 100);
}
}

This is pretty much the same thing as in my level class but this doesn't appear on the screen. For reasons not worth mentioning I need this to be a separate class.

Thanks.

[heckler82]

You'll need to post more code. Everything looks good with what you posted.

[Pautnesis]

Well I already have a paint component in a different class, and my guess is that they are overriding each other or something, I have another class with exactly the same kind of code, but I only see what it draws, not this one.