public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
   if (!(sender instanceof Player)) {
     sender.sendMessage(ChatColor.RED + "Only players may check their mail");
     return true;
   }
   Player player = (Player) sender;
   if (args.length == 0) {
     int number = TSNMySQL.getMailbox(player).size();
     ChatColor color = number > 0 ? ChatColor.GREEN : ChatColor.GRAY;
     player.sendMessage(color + "You have " + number + " messages.");
     return true;
   }
   if (args.length == 1) {
     if (args[0].equalsIgnoreCase("empty")) {
       int number = TSNMySQL.getMailbox(player).size();
       Iterator<String> it = TSNMySQL.getMailbox(player).iterator();
       while (it.hasNext()) {
         it.remove();
       }
       player.sendMessage(
           ChatColor.GREEN
               + Integer.toString(number)
               + " message(s) removed"); // No clue why toString is
       // needed
     }
     return true;
   } else if (args.length == 2) {
     if (args[0].equalsIgnoreCase("delete")) {
       int i;
       try {
         i = Integer.parseInt(args[1]);
       } catch (Exception e) {
         player.sendMessage(ChatColor.RED + args[1] + " is not a valid integer");
         return true;
       }
       int number = TSNMySQL.getMailbox(player).size();
       if (i > number) {
         player.sendMessage(ChatColor.RED + "You don't have " + i + " messages");
         return true;
       }
       TSNMySQL.getMailbox(player).remove(i);
     } else if (args[0].equalsIgnoreCase("open")) {
       int i;
       try {
         i = Integer.parseInt(args[1]);
       } catch (Exception e) {
         player.sendMessage(ChatColor.RED + args[1] + " is not a valid integer");
         return true;
       }
       int number = TSNMySQL.getMailbox(player).size();
       if (i > number) {
         player.sendMessage(ChatColor.RED + "You don't have " + i + " messages");
         return true;
       }
       player.sendMessage(TSNMySQL.getMailbox(player).get(i));
     }
   }
   return false;
 }
  public void onHeroChangeLevel(HeroChangeLevelEvent ev) {

    if (!(TSNMySQL.getFriends(ev.getHero().getPlayer()).isEmpty())) {}
  }