Server holding user information
<p>I'm trying to write myself a game server for educational purposes. 
I need to have some sort of list containing all the online users, their names and their X and Y positions. </p>

<p>What'd be the smartest way to hold this? I was thinking some sort of a multidimensional array or arraylist? Code examples as well would be great, i'm very new at Java :-)</p>
