Question

我的代码未向ArrayList object[]的{{1}}添加新索引。

我的代码：

            System.out.println("started1");
            ArrayList<Object[]> toSend = new ArrayList<Object[]>();
            System.out.println("started2");
            for(Entry<String, Room> map : rooms.entrySet())
            {
                System.out.println("started3");
                String key = map.getKey();
                Room val = map.getValue();
                System.out.println("started3.1");
                Player owner = players.get(val.getOwnerID());
                System.out.println("started3.125");
                Object[] toAdd = new Object[] {key, val.getRoomName(), val.getCurrentPlayerSize(), val.getMaxPlayers(), owner.getName()};

                System.out.println("started3.15");
                toSend.add(toAdd);
                System.out.println("started3.2");
            }

            System.out.println("started4");
            client.sendEvent("refreshAvailableRooms", toSend);
            System.out.println("started5");

设置owner变量以链接到Player类。我已经尝试打印出类值，它们都很好。当我尝试向我的对象数组添加新的Object[]时，它就会停止。

可能出现什么问题？（在控制台中，它会在System.out.println(started3.125");

之后停止打印

编辑：我应该提到rooms（在for循环中）链接到HashMap：

private static HashMap<String, Player> players = new HashMap<String, Player>();
private static HashMap<String, Room> rooms = new HashMap<String, Room>();

EDIT2：RUNNABLE CODE

Room.java:

public class Room {
   public String RoomName = "Room Name";
   public int size = 3;
   public int max = 10;
   public String ownerID = "BobSmith";
   public String ID = "Room1";

   public Room() { }
}

Player.java:
public class Player {
   public String ID = "BobSmith";
   public String Name = "Bob";
   public Player() { }
}

Main.java:
public class main {
   private static HashMap<String, Player> players = new HashMap<String, Player>();
   private static HashMap<String, Room> rooms = new HashMap<String, Room>();
   public static void main(String args[]) {
      players.put("BobSmith", new Player());
      rooms.put("Room1", new Room());
      rooms.put("Room2", new Room());
      rooms.put("Room3", new Room());

            System.out.println("started1");
            ArrayList<Object[]> toSend = new ArrayList<Object[]>();
            System.out.println("started2");
            for(Entry<String, Room> map : rooms.entrySet())
            {
                System.out.println("started3");
                String key = map.getKey();
                Room val = map.getValue();
                System.out.println("started3.1");
                Player owner = players.get(val.ownerID);
                System.out.println("started3.125");
                Object[] toAdd = new Object[] {key, val.RoomName, val.size, val.max, owner.Name};

                System.out.println("started3.15");
                toSend.add(toAdd);
                System.out.println("started3.2");
            }

            System.out.println("started4");
   }
}

Java - 不添加到对象的ArrayList

0 个答案: