java文本冒险，加载方法一直工作，直到用户输入到不同房间的方向？

Question

我最近一直在尝试做一个文本冒险类型的游戏。我已经准备好了大部分框架，我只需要完成调试。现在我的问题是，当你以新用户的身份运行游戏并保存游戏时，它工作得非常好。即使你把它装进去，它也能工作，直到你试图离开房间

Please enter a username: test
Creating game . . .

You are in a dark room.
You see a book and a key.
It looks like you can go forwards. 
>get book
You pick up the book.
>save
Saved successfully

那部分没问题，这部分是

What is your username: test
Loading game . . .

You are in a dark room.
You see a key.
It looks like you can go forwards. 
>get key
You pick up the key.
>forwards
You can't do that.
>exit
Are you sure? (y/n): y
Thanks for playing.

正如你所看到的，当我加载上一个游戏时，控制台会告诉我有什么出口，我可以看到我的库存中有这本书，我可以得到其他物品。我只是不知道如何让游戏把我送到下一个房间，因为你想从哪个出口出去

这是我的代码，我觉得和这个问题是一致的。我为我的代码的草率和低效提前道歉。我仍在学习并试图找出解决问题的最佳方法。非常感谢你们的任何建议或提示

荷载法

    public void load(Player p, Room r, World w, Inventory inven) throws Exception
    {
        Sleep s = new Sleep();
        long time = 3000;

        Scanner in = new Scanner(System.in);
        System.out.print("What is your username?: ");
        String username = in.next();
        String name;
        int currentRoomNumber;
        String currentRoomDescription;
        ArrayList<String> currentRoomItems = new ArrayList<String>();
        ArrayList<String> currentRoomExits = new ArrayList<String>();
        ArrayList<String> inv = new ArrayList<String>();
        File f = new File(username + ".txt");
        if(f.exists())
        {
            try
            {   
                ObjectInputStream ois = new ObjectInputStream(new FileInputStream(f));
                name = (String)ois.readObject();
                currentRoomNumber = (int)ois.readObject();
                currentRoomDescription = (String)ois.readObject();
                currentRoomItems = (ArrayList<String>)ois.readObject();
                currentRoomExits = (ArrayList<String>)ois.readObject();
                inv = (ArrayList<String>)ois.readObject();
                ois.close();

                p.setUserName(name);
                r.setRoomNumber(currentRoomNumber);
                r.setRoomDescription(currentRoomDescription);
                r.setItems(currentRoomItems);
                r.setExits(currentRoomExits);
                inven.setInv(inv);
                System.out.println();
                w.CurrentRoom(currentRoomNumber, currentRoomDescription, currentRoomItems, currentRoomExits);
            }
            catch(Exception e)
            {
                e.printStackTrace();
            }
        }
    } 

这就是我的代码出错的地方。这是我当前房间方法的一部分。它和其他房间都在我的世界级房间里。这是我唯一能想到的挽救比赛进程的方法

电流室

void CurrentRoom(int roomNumber, String roomDescription, ArrayList<String> items, ArrayList<String> exits)
    {
        Room CurrentRoom = new Room();
        String i1 = ""; // I use these to get the Strings out of the items Array.
        String i2 = "";
        String i3 = "";
        String e1 = "";//I was going to use these to get the exit Strings out of the exits Array
        String e2 = "";
        String e3 = "";
        String e4 = "";
        CurrentRoom.setRoomNumber(roomNumber);
        CurrentRoom.setRoomDescription(roomDescription);

        if(items.size() == 1)
        {
            i1 = items.get(0);
        }
        //I initialize all of my items like this

        if(exits.size() == 1)
        {
            e1 = exits.get(0);
        }
        else if(exits.size() == 2)
        {
            e1 = exits.get(0);
            e2 = exits.get(1);
        }
        else if(exits.size() == 3)
        {
            e1 = exits.get(0);
            e2 = exits.get(1);
            e3 = exits.get(2);
        }
        else if(exits.size() == 4)
        {
            e1 = exits.get(0);
            e2 = exits.get(1);
            e3 = exits.get(2);
            e4 = exits.get(3);
        }
        CurrentRoom.setExits(exits);

        while (true) 
        {
            if(items.size() > 0)
            {
                if(items.size() == 1)
                {
                    if (input.equals("get " + i1) && items.contains(i1)) 
                    {
                        items.remove(i1);
                        this.inventory.add(i1);
                    } 
                }//I use this plus other if statements to tell if the player is trying to get the items.
                //I tried copying the above code that worked for the items and using it on the exits, but I figured out it does not work the same for the exits.                
            }
            input = getInput();
        }

    }

问题是我将出口存储在一个数组中。我现在知道这根本不起作用，因为在游戏中加载出口阵列时，无法知道哪个出口真正通向哪个房间。我在这个网站上找到了一些方法，看到了一些关于使用

HashMap<String direction, Room neighbor>

我不知道如何真正使用上面的HashMap。解决此问题的最佳方法是什么，以便正确加载我的出口？我有一个示例室，用于测试我的代码。如果我需要在这里添加，请告诉我，谢谢