TP every player to her spawn [SkyWars] ¿HOW?

When an admin setup an arena doing: /sw spawn 0,1,2,3 or a random int do that code:

Code:

if (args[0].equalsIgnoreCase("spawn")) {
    int target = Integer.parseInt(args[1]);
    pl.getConfig().set("arena.player."+target+".x", p.getLocation().getBlockX()); // get the location of the sender
    pl.getConfig().set("arena.player."+target+".y", p.getLocation().getBlockY());    pl.getConfig().set("arena.player."+target+".z", p.getLocation().getBlockZ());
    pl.getConfig().set("arena.player."+target+".pitch", p.getLocation().getPitch());
    pl.getConfig().set("arena.player."+target+".yaw", p.getLocation().getYaw());
    pl.saveConfig();
    if(integerList.contains(target)){
        Util.broadcast(ChatColor.RED+""+target+" can't be added to at list");
    }else {
        integerList.add(target);
        Util.broadcast(ChatColor.GREEN+""+target+" added to at list");
    }
    pl.getConfig().set("arena.player.totalplayers",integerList.size());
    Util.broadcast(ChatColor.GREEN + "Player " + ChatColor.AQUA + target + ChatColor.GREEN + " spawn has been set!");
    return true;
}

that makes that in config.yml:
http://imgur.com/a/ecaZ9

Then, later i get that information from another class... but here is the problem...

Code:

public void tpPlayers(){
    pl.getConfig().getInt("arena.player.totalplayers"); // thats an arraylist... and i only get the size of it, to know how many players have
}

I am looking for do a loop for(pl.getConfig.getInt("arena.player.totalplayers").size)
and TP every player to her island... but i don't know how to do it... can you help me?
i ran out of ideas.. :C

 

@PistoFrancoPuumm Why not just save the players as a list?

 

i tried it, but when reload / close the server, that list will start at 0 another time... Then, i save it here.