public void initialize()
	{
		Graphics g = this.getGraphics();
		for (int i=0; i<FaceStyle.NUM_NUM; i++)	// Ϊ0
		{
			g.drawImage(mImgNum, FaceStyle.NUM_LEFT+i*FaceStyle.NUM_WIDTH, 
					FaceStyle.NUM_TOP, 
					FaceStyle.NUM_LEFT+(i+1)*FaceStyle.NUM_WIDTH, 
					FaceStyle.NUM_TOP+FaceStyle.NUM_HEIGHT, 
					0, 0, FaceStyle.NUM_WIDTH, FaceStyle.NUM_HEIGHT, this);
		}
		drawBalls(g);	// 
	}