backgroundimage.java

这是一张java应用教程的随书光盘

import java.awt.*;
import java.applet.*;
public class BackgroundImage extends Applet//继承Applet
{
	Image picture;
	boolean ImageLoaded=false;
	public void init()
		{
		picture=getImage(getCodeBase(),"data.gif");//装载图像
		Image offScreenImage=createImage(230,320);//创建Image对象
		Graphics offScreenGC=offScreenImage.getGraphics();//获取Graphics对象
		offScreenGC.drawImage(picture,0,0,this);//显示非屏幕图像
		}
	public void paint(Graphics g)
		{
		if(ImageLoaded)
			{
			g.drawImage(picture,100,0,null);//显示图像
			showStatus("Done");
			}
		else
			showStatus("Loadingimage");
			}
	public boolean imageUpdate(Image img,int infoflags,int x,int y,int w,int h)
		{
		if(infoflags==ALLBITS)
			{
			ImageLoaded=true;
			repaint();
			return false;
			}
		else
			return true;
		}
}