想画个动态的实心矩形，利用线程，有点问题，请各位帮忙看看！！！

[smart_code]

protected void paint(Graphics g) {
g.setColor(0x00000000);
g.fillRect(50, 55, 150, RecHeight);
}


public void run() {
// TODO Auto-generated method stub
while(RecHeight<100){
RecHeight+=10;
repaint();
try{
Thread.sleep(1000);
}catch (Exception e) {
// TODO: handle exception
}
}
画的时候看不到动态向下拉的过程，等过了大概十秒一次性绘制出来，我想实现动态的向下拉的矩形效果怎么绘制？谢谢各位

[harley]

import javax.microedition.lcdui.*;
public class Rect extends Canvas implements Runnable {
int RecHeight;
public final static int Width = 240,Height=320;
Thread thread;
public Rect() {
thread = new Thread(this);//开启线程
thread.start();
setFullScreenMode(true);//设置全屏
}
protected void paint(Graphics g) {
g.setColor(0x00000000);
g.fillRect(50, 55, 150, RecHeight);

}
public void run() {
// TODO Auto-generated method stub
while(RecHeight<100){
RecHeight+=10;
repaint();
try{
Thread.sleep(1000);
}catch (Exception e) {
// TODO: handle exception
}
}
}
}

上边代码都是按照你的写的。我的没有问题。就是下拉的时候有点慢。你把线程睡眠时间改短点。