java Me中的按键和触屏实例(3)

  plan_x=this.getWidth()/2;

  plane_y=this.getHeight()/2;

  exit=new Command("退出",Command.EXIT,1);

  start=new Command("启动",Command.SCREEN,1);

  over=new Command("结束",Command.SCREEN,2);

  point=new Command("指针启动",Command.SCREEN,3);

  trante=new Command("启动旋转",Command.SCREEN,4);

  this.addCommand(exit);

  this.addCommand(start);   

  this.addCommand(point);

  this.addCommand(trante);

  this.setCommandListener(this);

    }

protected void paint(Graphics g)

{

g.setColor(0,0,0);

g.fillRect(0, 0, this.getWidth(), this.getHeight());

g.drawImage(planeImage,plan_x,plane_y,g.HCENTER|g.VCENTER);

if(trante_event)

{

g.translate(trante_x, trante_y);

g.drawImage(planeImage,0,0,Graphics.LEFT | Graphics.TOP);

}

   }

public void commandAction(Command arg0, Displayable arg1)