我想通过按下JFrame中的按钮来启动另一个JFrame。但是，如果按Button，它将显示JFrame，但其中不显示Buttons和Sliders。

public class MainMenu extends JFrame {


private JFrame klick;
private static final long serialVersionUID = 9002;


public static void main(String[] args) {

    new MainMenu();

}


public MainMenu() {
    buildGUI1();

}
public void buildGUI1() throws NullPointerException {
    setTitle("Hauptmenü");      
    setSize(800, 480);
    setLayout(new GridLayout());
    setAlwaysOnTop(false);
    setLocation((Toolkit.getDefaultToolkit().getScreenSize().width)/4, (Toolkit.getDefaultToolkit().getScreenSize().height)/4);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setResizable(false);
    setVisible(true);
    final JButton startclickbt = new JButton("Start Clicker");
    startclickbt.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            dispose();
            if(klick == null ) {
                klick =new Clicker();
                add(klick);
            }


        }
    });

    add(startclickbt);


    }

}

第二个具有完全相同的构造函数。滑块和按钮不是静态的。在应显示“按钮”的位置，屏幕为黑色。

希望你能帮我 ：）

编辑：

public class Clicker extends JFrame {

    private static final long serialVersionUID = 9001;
    protected JPanel panel;
    static Click j = null;
    protected JSlider jsl;
    protected JTextField tf;
    static final int CPS_MIN= 0;
    static final int CPS_MAX= 100;
    static final int CPS_INIT= 25;
    private int amount;
    private boolean visible;

    public int getDelay() {
        return Math.abs(jsl.getValue()-100);
    }
    public int getAmount() {
        return amount;
    }
    public boolean getVisible() {
        return visible;
    }
    public void setOpen(boolean visible) {
        this.visible=visible;
    }

    public Clicker(boolean visible) {

        buildGUI(visible);
        j = new Click(false).addPosition(new Point((Toolkit.getDefaultToolkit().getScreenSize().width)/2, (Toolkit.getDefaultToolkit().getScreenSize().height)/2)).addPosition(new Point(getLocation().x+1, getLocation().y+20));
        while(true) {

            j.runClicks(getDelay());
        }
    }

    public Clicker() {
        buildGUI(true);
        j = new Click(false).addPosition(new Point((Toolkit.getDefaultToolkit().getScreenSize().width)/2, (Toolkit.getDefaultToolkit().getScreenSize().height)/2)).addPosition(new Point(getLocation().x+1, getLocation().y+20));
        while(true) {

            j.runClicks(getDelay());
        }
    }
    public void buildGUI(boolean visible) {

        setTitle("Clicker");
        setSize(340, 200);
        setLayout(new GridLayout());
        setAlwaysOnTop(true);
        setLocation(0, 0);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);
        setVisible(visible);

        final JButton bt1 = new JButton("Schließen");
        bt1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                System.exit(0);
            }
        });
        final JButton bt2 = new JButton("Start  ");
        bt2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                j.setClick(true);
            }
        });
        final JButton bt3 = new JButton("Stop       ");
        bt3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                j.setClick(false);
                JOptionPane.showMessageDialog(null, "Klicken gestoppt. Klicks: " + j.getClickAmount());
                j.setClickAmout(0);
            }
        });
        final JButton bt4 = new JButton("StartAnzahl");
        bt4.addActionListener(new ActionListener() {
            private int amount;

            public void actionPerformed(ActionEvent e) {
                String wert = tf.getText();
                try {
                    amount = Integer.parseInt(wert);
                }catch(Exception ee) {
                    JOptionPane.showMessageDialog(null,"Das war keine Zahl oder mehr als ein Integer");
                }

                j.doClick(amount);


            }
        });
        tf = new JTextField("Anzahl gewünschte Clicks max "+ Integer.MAX_VALUE, 10);
        tf.setEditable(true);


        jsl = new JSlider(JSlider.HORIZONTAL,CPS_MIN,CPS_MAX,CPS_INIT);
        jsl.setMinorTickSpacing(5);
        jsl.setMajorTickSpacing(10);
        jsl.setPaintTicks(true);
        jsl.setPaintLabels(true);

        panel = new JPanel();
        panel.addMouseMotionListener(new MouseMotionListener() {

            @Override
            public void mouseDragged(MouseEvent event) {
                j.setClick(false);  
            }

            @Override
            public void mouseMoved(MouseEvent event) {
                j.setClick(false);          
            }
        });

        panel.addKeyListener(new KeyAdapter() {

            @Override
            public void keyPressed(KeyEvent e) {
                if(e.getKeyCode() == KeyEvent.VK_F1) {
                    j.setClick(true);
                }
                if(e.getKeyCode() == KeyEvent.VK_F2) {
                    j.setClick(false);
                }
            }

        });


        add(panel);
        add(bt2);
        add(bt3);
        add(bt1);
        add(bt4);
        add(jsl);
        add(tf);

        pack();
    }

}