数组索引超出界限Java游戏

I'm creating a game in java and I'm attempting to create a multiplayer for it, when the game first starts, the level is loaded and the client is added to a playerlist which is clientside, the client will iterate through the list and add more if the server tells it to but the problem is that I'm getting 'ArrayIndexOutOfBoundsException' whent he game first starts, I've instructed my game to ignore it, I cant seem to fine the problem.I'm creating a game in java and I'm attempting