jlayeredpane2.java

《精通Java Swing程序设计S》这本书所附带的JAVA程序写得很漂亮,都是SWING的实例子,很适合初学者。

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class JLayeredPane2 extends JFrame
{
    public JLayeredPane2()
    {
        super("JLayeredPane");
        Integer[] layerConstants = { new Integer(-100),
        JLayeredPane.PALETTE_LAYER, new Integer(101), 
        JLayeredPane.MODAL_LAYER, new Integer(201),
        JLayeredPane.POPUP_LAYER, JLayeredPane.DRAG_LAYER };
        
        Color[] colors = { Color.red, Color.blue,
                                Color.magenta,Color.cyan ,
                                Color.yellow,Color.green,
                                Color.pink };
                                    
        Point position = new Point(10,10);
        JButton[] button = new JButton[7];
        JLayeredPane layeredPane = getLayeredPane();
        
        for (int i=0 ; i<7; i++)
        {
            button[i] = createButton("Button "+(i+1),colors[i],position);
            position.x = position.x+20;
            position.y = position.y+20;
            layeredPane.add(button[i],layerConstants[i]);
        }
        
        Container contentPane = getContentPane();
        contentPane.setLayout(new GridLayout(2,2));
        JButton b1 = new JButton("