paintComponent tekent niet

public class PongGame extends JFrame {

  // variablen hier
    
    private Gui gui;
    
    public static void main(String[] args) {
        // TODO code application logic here
        new PongGame();
        
    }
    public PongGame() {
        
         gui = new Gui();

        setSize(500, 500);

        setTitle("Pong Game -- Arne Van Cant");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setContentPane(gui);
        setVisible(true);
        setResizable(false);
        setLocationRelativeTo(null);
        
        
    }
}
class Gui extends JPanel {
    
    public Gui() {
        
        
    }
}
class gamePaneel extends JPanel {
    
    // hier komen variable van bal en peddel
    private Peddel peddelA,peddelB;
    
    public gamePaneel() {
        
        // nieuwe instanties van bal en peddel aanmaken
        
        peddelA = new Peddel(20, 120, Color.blue);
        peddelB = new Peddel(20, 120, Color.red);
               
    }
    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        
        peddelA.draw(g);
        peddelB.draw(g);
    }
    
    
}
class Peddel {
      private int x, y;
    private Color kleur;
    private int hoogte = 70;

    public Peddel(int x, int y, Color kleur) {
        this.x = x;
        this.y = y;
        this.kleur = kleur;

    }

    public void draw(Graphics g) {
        g.setColor(kleur);
        g.fillRect(x, y, 10, hoogte);
    }

    public void moveUp() {
        if (y > 0) {
            y = y - 10;
        }
    }

    public void moveDown() {
        if (y < 341) {
            y = y + 10;
        }
    }

    public int getX() {
        return x;
    }

    public int getYBoven() {
        return y;
    }

    public void setHoogte(int hoogte) {
        this.hoogte = hoogte;
    }

    public int getYOnder() {
        return y + hoogte;
    }
}

    public void paint(Graphics2D g){
        System.out.print("paint=>"+toString());
        g.setColor(Color.black);
        g.fillRect(0, 0, d.width, d.height);
        DrawMaze(g);
    }