如何在Java中将在一个类中创建的对象传递给另一个类？

让makeReservation返回创建的Reservation对象：

 public Reservation makeReservation(int checkIn, int checkOut)//Other parameters{    reservation = new Reservation(checkIn, checkOut);    return reservation;}

（您也可以为创建吸气剂

reservation

然后像这样更改您的addReservation：

public void addReservation(Reservation res){    reservations.add(res);}

然后像这样添加它：

HotelReservationSystem hrs = new HotelReservationSystem();Reservation res = hrs.makeReservation();Room room = new Room();room.addReservation(res);

但是，您可能需要重新考虑模型。现在，您

HotelReservationSystem