java - 如何将用户输入的数字添加到字符串的末尾以选择特定对象

Question

我正在努力学习 Java 代码。

目前我有8个房间

    room1 = new Room(1,1);
    room2 = new Room(2,1);
    room3 = new Room(3,1);
    room4 = new Room(4,1);
    room5 = new Room(5,2);
    room6 = new Room(6,2);
    room7 = new Room(7,3);
    room8 = new Room(8,3);

现在我需要让用户输入他们需要的房间的数字 1 到 8，然后系统需要将该数字添加到前缀房间，以便我可以调用所需房间的方法。

我目前有这个代码来接收选择

roomselect = scan.nextInt();

然后这就是我卡住的地方，因为我不确定如何将 roomselect 整数添加到前缀“room”上

谢谢

Answer 1

只需使用数组:

// Create an array of Rooms
Room rooms[] = new Room[8];
// Now, you have a placeholder for 8 rooms
// Know that it are simply placeholders, the rooms are not initialized.
// Each element of the array is initialized to null

// Assigning
rooms[2] = new Room(3, 2); // Initialize the room at index 2 (which is the 3th 
                           // in spoken language)


// Retrieving
int index = 4; // Indices start at 0
Room room4 = rooms[index];

// Or...
rooms[5].doSomething();


// Getting the length
int numberOfRooms = rooms.length;

因此，要解决您的问题:

int roomselect = scan.nextInt();
Room selectedRoom = rooms[roomselect];