一个展示启动画面的例子

其中BootPicture．java即为启动的画面　如下：

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

public class BootPicture extends JWindow {
	private ImageIcon image = new ImageIcon(  "173.jpg"  );;


	public void paint( Graphics g ); {
		g = this.getGraphics();;
		super.paint( g );;
		g.drawImage( image.getImage();,0,0,null );;

		System.out.println( "Paint" );;
	}
	public BootPicture(); {
		Dimension screenSize = Toolkit.getDefaultToolkit();.getScreenSize();;
		this.setSize( 300,300);;
		this.setAlwaysOnTop( true );;
		int xLocation = ( screenSize.width - this.getSize();.width );/2;
		int yLocation = ( screenSize.height - this.getSize();.height );/2;
		this.setLocation( xLocation,yLocation);;
		this.setVisible( true );;
	}

	public static void main( String[] args ); {
		new BootPicture();;
	}
}

Demo.java为一个主类：

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

public class Demo extends JFrame {
	public Demo(); {
		this.setSize( 300,300 );;
		this.setLocation( 300,300 );;
		this.setVisible( true );;
	}

	public static void main( String[] args ); {
		BootPicture boot = new BootPicture();;
		try {
			Thread.sleep( 3000 );;
		}catch( Exception e ); {
			e.printStackTrace();;
		}
		boot.dispose();;

		new Demo();;
	}
}