fh113.java

课本上的程序

import javax.swing.*;
import java.awt.*;
class fh113
{
	public static void main(String args[])
	{
		JFrame win=new JFrame("窗体");
		win.setBounds(100,100,300,300);
		win.setVisible(true);
		JButton b1=new JButton("我在DEFAULT_LAYER"),
		        b2=new JButton("我在PALETTE_LAYER"),
		        b3=new JButton("我在MODAL_LAYER"),
		        b4=new JButton("我在POPUP_LAYER"),
		        b5=new JButton("我在DRAG_LAYER");
		Container contenetPane=win.getContentPane();
		JLayeredPane pane=new JLayeredPane();
		pane.setLayout(null);
		pane.add(b5,JLayeredPane.DRAG_LAYER);
		pane.add(b4,JLayeredPane.POPUP_LAYER);
		pane.add(b3,JLayeredPane.MODAL_LAYER);
		pane.add(b2,JLayeredPane.PALETTE_LAYER);
		pane.add(b1,JLayeredPane.DEFAULT_LAYER);
		b5.setBounds(50,50,200,100);
		b4.setBounds(40,40,200,100);
		b3.setBounds(30,30,200,100);
		b2.setBounds(20,20,200,100);
		b1.setBounds(10,10,200,100);
		b1.setBackground(Color.red);
		b2.setBackground(Color.pink);
		b3.setBackground(Color.green);
		b4.setBackground(Color.orange);
		b5.setBackground(Color.yellow);
	    contenetPane.add(pane,BorderLayout.CENTER); 
	    contenetPane.validate();  
	    win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    
	}
}