public String getFriends(String separator)
    {
        String separatedFriends = "";
        if (friends.size() > 0)
        {
            separatedFriends = separatedFriends + friends.get(0).name;
        }
        for (int i = 1; i < friends.size(); i++)
        {
            separatedFriends = separatedFriends + separator + friends.get(i).name;
        }
        return separatedFriends;
    }