JButton loggin = new JButton("登入");;
        loggin.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent e){
                
                Icon icon1 = new ImageIcon(getClass().getResource("player1.png"));
                JLabel labelPlayer1 = new JLabel(icon1);
                labelPlayer1.setBounds(450,10,icon1.getIconWidth()+200,icon1.getIconHeight());
                gamePanel.add(labelPlayer1);
                gamePanel.setBackground(Color.black);
            }
        });