JPanel paintComponent method

public class CanadaFlag extends JPanel {
 
    public CanadaFlag() {
    }
    
    public void paintComponent(Graphics g) {
    	
    	Graphics2D g2 = (Graphics2D)g;  
    	Rectangle flag = new Rectangle();
    	flag.setBounds(this.getBounds());
    	
    	int h = (int)flag.getHeight();
   	int w = (int)flag.getWidth();
    	int xCoord = (int)flag.getX();
    	int yCoord = (int)flag.getY();
    	
 
    	g2.setColor(Color.WHITE);
    	g2.fillRect(xCoord,yCoord,w,h); //this only draws it in the 
//topleft.
 
//here is where i call the panel:
 
public class FlagsFrame extends JFrame {
 
    public FlagsFrame() {
    	Toolkit toolkit = Toolkit.getDefaultToolkit();
    	Dimension dimensions = toolkit.getScreenSize();
    	int height = dimensions.height;
    	setBounds(0,0,height,height);
    	setLayout(new GridLayout(2,2));
    	add(new CanadaFlag());
    	add(new CanadaFlag());
    	add(new CanadaFlag());	
    	add(new CanadaFlag());
    	setTitle("Designed by Eric Totte: Canadian-Olympic"); 	
    }    
}