下面是源程序：
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.border.*;
public class TJLayeredPane extends JFrame implements ActionListener
{
JButton button;
JLayeredPane layeredPane;
static int frameCount=0;
static final int xOffSet=25;
static final int yOffSet=25;
int numFrames=1;
Integer[] frameConstants={JLayeredPane.DEFAULT_LAYER,JLayeredPane.PALETTE_LAYER,
JLayeredPane.MODAL_LAYER,JLayeredPane.POPUP_LAYER,JLayeredPane.DRAG_LAYER};
String[] layerNames={"Default layer","Palette layer","Modal layer","Popup layer","Drag layer"};
 Vector framesVector=new Vector();
public TJLayeredPane()
{
super("TJLayeredPane");
JPanel panel=new JPanel(new GridLayout(3,3));
panel.setBorder(BorderFactory.createTitledBorder("Click button to add frames or clear frames"));
for(int i=0;i