Java Paper 1.16.5 Code

    @EventHandler
    public void onPlayerChat(AsyncChatEvent e) {
        Player player = e.getPlayer();

        for (Player players : Bukkit.getOnlinePlayers()) {

            String name = players.getName().toLowerCase();
            String inhalt = ("@"+players.getName().toLowerCase()).toLowerCase();

            if (e.message().toString().toLowerCase().contains(name)) {



                if(e.message().toString().toLowerCase().contains(inhalt)){

                    players.sendMessage(ChatColor.GREEN + players.getName() + " says your name.");
                    players.sendMessage(e.message().color(TextColor.color(255,0,0)));

                    // Change players message. Make @Name green.


                }


            }


        }

    }