Applet闪烁的问题 - 黑马程序员技术交流社区

package JavaApplet;
import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.MediaTracker;
import java.util.ArrayList;
import java.util.List;
//在Applet上绘制一个图像,可以调用drawImage静态方法
public class JavaAppletDemo extends Applet
{
private MediaTracker mt;//来控制图片是否完全被加载
private int imageSum = 5; //图片总数为10
private Image image[];
private int currentImage;//当前绘制的图像索引
//双缓冲技术
private Image imageBuff;
private Graphics grs;
public void init() {
mt = new MediaTracker(this);//跟踪本对象
imageBuff = createImage(600, 400);//创建图片缓冲
grs = imageBuff.getGraphics();//将imageBuff关联到绘图
grs.setColor(Color.WHITE);
grs.fillRect(0, 0, 600, 400);
image = new Image[imageSum];//为数组分配空间
for(int x=0;x<imageSum;x++)
{
image[x] = getImage(getDocumentBase(),(x+1)+".gif");//getDocumentBase来返回URL路径
mt.addImage(image[x], x);//将跟踪的图片添加到跟踪器
}
try {
mt.waitForID(0);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(getDocumentBase());
System.out.println(getCodeBase());
}
@Override
public void start() {
currentImage = 0;//每次从新启动的时候图片的索引都被初始化
grs.drawImage(image[currentImage],0 , 0, this);//将图形绘制到缓冲区当中
currentImage = 1;
}
@Override
public void stop() {
}
@Override
public void destroy() {
}
int x=0;//移动的坐标
public void paint(Graphics g) {
g.drawImage(imageBuff, 0, 0, this);
if(mt.checkID(currentImage,true))
{
grs.fillRect(0, 0, 600, 400);
grs.drawImage(image[currentImage], x, 10, this);
x++;
// currentImage =++currentImage%10;
currentImage++;
if(currentImage==imageSum){currentImage=0;}
}
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
repaint();
}
public void update(Graphics g) {
<FONT color=red>//去除闪烁我在这里重写了 update方法为什么还会闪烁？</FONT>
paint(g);
}
}

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