Development Assistance All the players don't get teleported...

Hi
I try to get all the players in a arraylist teleported to a location, but it's only one player that get teleported.

Here is my teleporter method:

Code:

    public void teleporter() {
           for (Player p : Bukkit.getOnlinePlayers()) {
                 if (join.contains(p)) {
                 if (timer <= 10) {
                     if (timer == 0) {
                              World w = Bukkit.getWorld(getConfig().getString("Locations.arena.world"));
                              double x = getConfig().getDouble("Locations.arena.X");
                              double y = getConfig().getDouble("Locations.arena.Y");
                              double z = getConfig().getDouble("Locations.arena.Z");
                              p.teleport(new Location(w, x, y, z));
                              stopScheduler();
                              timer += 10;
                              p.sendMessage(ChatColor.RED.toString() + ChatColor.BOLD + "[FastPlayer] " + ChatColor.GREEN + "Gooo!!!");
                              return;
                             }
                                 p.sendMessage(ChatColor.RED.toString() + ChatColor.BOLD + "[FastPlayer] " + ChatColor.LIGHT_PURPLE.toString() + ChatColor.BOLD.toString() + timer + "" + ChatColor.GREEN + " sekunder til start");                       
                             }
                         }
               
             }
    }

I call the method in a repeating task that look like this:

Code:

    public void startScheduler(){
        this.taskId = Bukkit.getServer().getScheduler().scheduleSyncRepeatingTask(this, new Runnable(){
            public void run(){
                teleporter();
                  timer -= 1;
             }
        }, 0L, 20L);
    }

All players in the arraylist get the message:

Code:

p.sendMessage(ChatColor.RED.toString() + ChatColor.BOLD + "[FastPlayer] " + ChatColor.LIGHT_PURPLE.toString() + ChatColor.BOLD.toString() + timer + "" + ChatColor.GREEN + " sekunder til start");

But they don't get teleported

 

You add 10 to the timer, of course timer will be bigger or equal to 10 for the next iteration

 

I tried to remove the part "timer += 10;" but that didnt help