MOD please delete, double post

[Alberto901]

SRRY. look at other thread. double posted by mistake.

[65K]

for(Player others : players) {
if(player1.getWorld() == others.getWorld()) {
blabla

Let your logic operate within the scope of one world, so you don't even see the other players.
Give each world its own player collection.

[jonjava]

You're a lot better off having a single server doing all the work and doing it the 1) way.