How to get OnlinePlayers in a Certain Group

is it possible to get the onlineplayers that are on in a certain group? like when someone types /who it will show my custom groups

ex.
Admins: Sofakingcool
Mods: example
players: example
Total Players on: 3

 

You would need to hook into a permissions plugin because the default bukkit system doesn't use permission groups.

You could create a config where the admin inputs all the player names into the correct groups.

 

I think you should be able to read it from the permissions.yml itself.

 

but as celeixen mentioned the default permissions.yml doesn't use groups, so you can't do what the OP wants to do that way.

 

how would i set this up, would i need a playlistener? start me off a little with some code

 

for(Player player : Bukkit.getServer().getOnlinePlayers()){
//find out if the player is in a certain group
//display him if he is in the group you want
}