求救！组件或容器的remove()或removeAll()怎么用

Question

repaint一下。
final Container contentPane = getContentPane();
contentPane.addMouseListener(
  new MouseAdapter(){
    public void mousePressed(MouseEvent e){
      contentPane.removeAll();
      contentPane.repaint();
    }
  }
);

Answer 1

差不多的。
new MouseAdapter(){
    public void mousePressed(MouseEvent e){
      contentPane.removeAll();
      JButton btnNew = new JButton("new");
      btnNew.setBounds(0, 0, 75, 20);
      contentPane.repaint();
    }
  }