问如何使用JRadioButtons在Java中制作多选游戏并将其显示在屏幕上？

EN

public class myWork extends JPanel implements MouseListener{
int screen;
Image homeScreen, question1;
ButtonGroup group1 = new ButtonGroup();
private JRadioButton q1a1;
private JRadioButton q1a2;
private JRadioButton q1a3;
private JRadioButton q1a4;


public myWork() {
    screen = 1;
    JFrame frame = new JFrame ("Quiz UP!");
    frame.setSize(600, 600);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setLayout(null);
    setVisible(true);
    frame.add(this);

    //Below are all of the pictures which will be used for this game
    homeScreen = Toolkit.getDefaultToolkit().getImage("homeScreen.PNG");
    question1 = Toolkit.getDefaultToolkit().getImage("question1.PNG");      


    frame.setVisible(true);
    addMouseListener(this);
}

public void G1 () {
    q1a1 = new JRadioButton ("Doe Doe Bird", false);
    q1a2 = new JRadioButton ("Dove", false);
    q1a3 = new JRadioButton ("Female Deer", true);
    q1a4 = new JRadioButton ("Deer", false);
    //Add the radiobuttons on the screen
    JFrame frame = new JFrame ();
    frame.add(q1a1);
    frame.add(q1a2);
    frame.add(q1a3);
    frame.add(q1a4);
    //Group for buttons
    //The group makes it so when one button is checked, the other ones are turn off
    group1 = new ButtonGroup();
    group1.add(q1a1);
    group1.add(q1a2);
    group1.add(q1a3);
    group1.add(q1a4);
    JPanel panel = new JPanel();
    panel.add(q1a1);
    panel.add(q1a2);
    panel.add(q1a3);
    panel.add(q1a4);
    setVisible(true);
}

public void paintComponent(Graphics g)
{ 
    if (screen == 1) {
        g.drawImage (homeScreen, 0,0,600,600,this);

    }else if (screen == 2) {
        g.drawImage(question1, 0, 0, 600, 600, this);
        G1();

    }
}
public void mouseClicked (MouseEvent e)
{
    int x, y;
    x = e.getX ();
    y = e.getY ();

    if ((x<=373 && x >=223) && (y<=410 && y >=327)) {
        screen = 2;
        repaint();
    }
}

public void mouseReleased (MouseEvent e) 
{
}

public void mouseEntered(MouseEvent e) {
}

public void mouseExited(MouseEvent e) {
}

public void mousePressed(MouseEvent e) {
}

public static void main (String [] args) {
    myWork work = new myWork();
}
}