例8-6.java

来自「用Java和XML建立试题库管理系统,试题库管理系统的设计」· Java 代码 · 共 31 行

//example 8-6
import java.applet.Applet;
import java.awt.*;
public class tt extends Applet
{
   Image baseImg;
   int process;
   public void init()
   {
   	 baseImg=getImage(getCodeBase(),"duke.gif");
   }
   public void paint(Graphics g)
   {
   	  g.drawImage(baseImg,0,0,this);
   }
   public boolean imageUpdate(Image img,int infoflags,int x,int y,int width,int height)
   {
   	 if((infoflags&SOMEBITS)!=0)
   	 {
   	    process+=height;
   	    int percent=process*100/img.getHeight(this);
   	    showStatus(percent+"%");
   	    repaint();
   	 }
   	 if((infoflags&ERROR)!=0)
   	 {
   	    System.out.print("image loading error");
   	 }
   	 return (infoflags&(ALLBITS|ERROR))==0;
   }
}