class wheel{}
class engine{}
class bodywork{}
public class TankFacade
{
wheel[] wheels = new wheel[4];
engine e = new engine();
bodywork b = new bodywork();
public void start(){}
public void stop(){}
public void shot(){}
}
class app
{
TankFacade tankf = new TankFacade();
tankf.start();
tankf.stop();
}
