import org.epsilon.jar.*; import org.epsilon.jar.commands.*; public class Main { public static void main(String[] args) { Drone drone = new Drone(); drone.setFlightController(new FlightController()); drone.setSensors(new Sensors()); FlightCommand takeoffCommand = new TakeOffCommand(drone); FlightCommand landCommand = new LandCommand(drone); takeoffCommand.execute(); landCommand.execute(); } }