?? doublebuffer.java
字號:
//doublebuffer.java
import java.awt.*;
import java.applet.Applet;
public class doublebuffer extends Applet implements Runnable{
Image memoryimage;
Graphics memorygraphics;
Thread doublebufferthread;
boolean animateFlag=true;
int loop_index=0;
public void init(){
memoryimage=createImage(100,100);
memorygraphics=memoryimage.getGraphics();
}
public void start(){
doublebufferthread=new Thread(this);
doublebufferthread.start();
}
public void stop(){
animateFlag=false;
}
public void run(){
while(animateFlag){
repaint();
try{Thread.sleep(200);}
catch(InterruptedException e){}
}
}
public void paint(Graphics g){
loop_index+=5;
if(loop_index>=100) loop_index=5;
memorygraphics.setColor(new Color(255,255,255));
memorygraphics.fillRect(0,0,100,100);
memorygraphics.setColor(new Color(0,0,0));
memorygraphics.drawRect(0,0,loop_index,loop_index);
g.drawImage(memoryimage,10,10,this);
}
}
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