java - 如何将对象插入数组？

Question

如何将对象插入数组？这里我有一个名为 HotelRoom 的类，其中包含 getter、setter 和构造函数方法。

public class HotelRoom {

int roomNumber;
String roomGuest;


public HotelRoom (int room, String guest) {
    roomNumber = room;
    roomGuest = guest;
}

public int getRoom() {
    return roomNumber;
}

public void setRoom() {
    roomNumber = room;
}

public String getName() {
    return roomGuest;
}

public void setName() {
    roomGuest = guest;
}

这里我有包含数组初始值设定项和对象的 main 方法。我还将对象插入到数组中，但是在编译时，打印命令中出现了问题，它指出:“找不到符号 - 变量 HotelRoom”。我究竟做错了什么？

public class Hotel {
    public static void main (String [] args) {
    HotelRoom[] rooms = new HotelRoom [5];

    HotelRoom guest1 = new HotelRoom(67, "Harry");
    HotelRoom guest2 = new HotelRoom(98, "Bob");
    HotelRoom guest3 = new HotelRoom(34, "Steven");
    HotelRoom guest4 = new HotelRoom(99, "Larry");
    HotelRoom guest5 = new HotelRoom(103, "Patrick");

    rooms[0] = guest1;
    rooms[1] = guest2;
    rooms[2] = guest3;
    rooms[3] = guest4;
    rooms[4] = guest5;

    System.out.println (HotelRoom);
}

}

Answer 1

这是因为 HotelRoom 是一个类，而不是Object。如果您打算打印所有房间，也许您可​​以尝试以下操作:

for(final HotelRoom room : rooms)
    System.out.printf("%s in room %d\n", room.getName(), room.getRoom());

或者您可以重写 HotelRoom 中的 toString() 方法:

public String toString(){
    return String.format("%s in room %d", roomGuest, roomNumber);
}

通过重写的 toString() 方法，您现在可以将循环修改为:

for(final HotelRoom room : rooms)
   System.out.println(room);

或者，如果你愿意的话:

System.out.println(Arrays.toString(rooms));