如何在从不同类传递的帧上使用paint组件

Question

我正在制作一款名为Mastermind的游戏。为了创建游戏板，我使用paintComponent绘制到作为来自不同类的参数传递的帧。为什么除了后退按钮之外什么都不打印？

public class mastermindColor extends JPanel //running color game
{
    Rectangle rect = new Rectangle(100, 100, 150, 75);
    private JButton backButton = new JButton();
    JFrame f = new JFrame();
    public mastermindColor(final JFrame frame) //creating color game frame
    {
        String back = BorderLayout.CENTER;
        backButton.setText("back");
        frame.add(backButton, BorderLayout.NORTH);
        frame.add(this, BorderLayout.CENTER);
        backButton.setVisible(true);
        backButton.addActionListener(new ActionListener() //if back button is selected
        {
            public void actionPerformed(ActionEvent e)
            {
                frame.getContentPane().removeAll();
                mastermindRunner run = new mastermindRunner();
            }
        });
        frame.setVisible(true);
    }

    public void paintComponent(Graphics g) //printing the game set up
    {
        super.paintComponents(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.draw(rect);
    }