How to set JFrame's LayeredPane?

Question

Hello,eveyone!
I wat to set JFrame's LayeredPane by JFrame's setLayeredPane() method.
My code as follow:
import javax.swing.*;
import java.awt.*;
public class LayeredTest{
    public static void main(String[] args){
        SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                new MyFrame().setVisible(true);
class MyFrame extends JFrame{
    public MyFrame(){
        super("LayeredTest");
        setLayeredPane(new JLayeredPane());           //this line, I want to set the LayeredPane myself;
                                                      //but it doesn't work.
        JPanel panel =new JPanel();
        panel.setPreferredSize(new Dimension(320,240));
        panel.add(new JLabel("Label"));
        panel.add(new JButton("Button"));
        add(panel);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        pack();   
}But the application runs abnormality.
Any one tells me why and how to modify?
thanks!
Message was edited by:
Eastsun

Answer 1

The content pane of the JFrame should be added to the layered pane.
When you set a new layered pane, it doesn't automatically do that.
Add this after you add the new layered pane:
layeredPane.add(contentPane, JLayeredPane.FRAME_CONTENT_LAYER);