j2me drawImage方法实现的连续动画

import java.io.IOException;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;

public class test6 extends Canvas implements Runnable {
Image planeImg,mapImg;
int n=1,i;
int planeIndex[]={0,1,2,3};
int mapIndex[][]={
{4,5,5,5,5,5,6},
{7,8,8,8,8,8,9},
{7,8,8,8,8,8,9},
{7,8,8,8,8,8,9},
{7,8,8,8,8,8,9},
{7,8,8,8,8,8,9},
{7,8,8,8,8,8,9},
{7,8,8,8,8,8,9}, {10,11,11,11,11,11,12},
};

public test6() {
super();
// TODO Auto-generated constructor stub
try {
mapImg=Image.createImage("/20.png");

planeImg=Image.createImage("/200528141737203r"+n+".png");

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
new Thread(this).start();
}

protected void paint(Graphics g) {
// TODO Auto-generated method stub
g.setColor(200,200,200);
g.fillRect(0,0,176,208);
g.setClip(40,80,64,64);
g.drawImage(planeImg,40,80,Graphics.LEFT|Graphics.TOP);
}
public void run() {
//TODO Auto-generated method stub
while(true){
try {
Thread.sleep(20);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(planeIndex[i]==3)
planeIndex[i]=0;
else
planeIndex[i]+=1;
n++;
repaint();

}

}
 
 
 
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}