package SimpleSlot; /** * Created by Administrator on 2017/6/19. */ public class GarageDoorOpenCommand implements Command { GarageDoor garageDoor; public GarageDoorOpenCommand(GarageDoor garageDoor) { this.garageDoor = garageDoor; } @Override public void execute() { garageDoor.lightOn(); garageDoor.up(); System.out.println("GarageDoor is open"); } @Override public void undo() { garageDoor.lightClose(); garageDoor.down(); System.out.println("GarageDoor is down"); } }