Solved setPlayerListName on join doesn't work

I'm making a plugin with grades.
I've set a file (config.yml) to remember the user's grade (this work)
But the problem is, in my PlayerJoin class, i try to set the playerListName with his grade but it doesn't show anything, i only see my nickname without my grade

Code:

@EventHandler
    public void onPlayerJoin(PlayerJoinEvent event) {
        String playerGrade = "default";
        Player player = event.getPlayer();
        if (plugin.getConfig().contains(player.getName())) {
            playerGrade = plugin.getConfig().getString(player.getName() + ".grade");
            player.sendMessage(ChatColor.GOLD + "Votre grade est " + playerGrade); // Translate : You're grade is + playerGrade
        }else {
            plugin.getConfig().createSection(player.getName() + ".grade");
            plugin.getConfig().set(player.getName() + ".grade", "default");
            player.sendMessage(ChatColor.RED + "Vous n'avez pas de grade, vous avez donc le grade par defaut"); //Translate : You don't have any grade, so you have the default grade
        }
        ChangeName.changeDisplayName(player, playerGrade); //I call this function to set the playerListName
    }

(the messages are in french because i'm french)

I took the screenshot just after login

 

Mind posting the config.yml?

 

@Lampades you need the config.yml ?

My config.yml :

Code:

Grade:
  default: 0
Aldrein:
  grade: dev

@Lampades

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Show us the code for this method but first did you register the event?

 

Here is the code on my function setting the player list name

Code:

public static void changeDisplayName(Player player, String grade) {
        String playerName = player.getName();
        player.setDisplayName("");
        player.setPlayerListName("");
        if (grade.equals("default")) {
            player.setDisplayName(ChatColor.GRAY + playerName + ChatColor.WHITE);
            player.setPlayerListName(ChatColor.GRAY + playerName);
        }else if (grade.equals("vip")) {
            player.setDisplayName(ChatColor.YELLOW + "[VIP]" + playerName + ChatColor.WHITE);
            player.setPlayerListName(ChatColor.YELLOW + "[VIP]" + playerName);
        }else if (grade.equals("supervip")) {
            player.setDisplayName(ChatColor.LIGHT_PURPLE + "[SuperVIP]" + playerName + ChatColor.WHITE);
            player.setPlayerListName(ChatColor.LIGHT_PURPLE + "[SuperVIP]" + playerName);
        }else if (grade.equals("helper")) {
            player.setDisplayName(ChatColor.DARK_AQUA + "[Helper]" + playerName + ChatColor.WHITE);
            player.setPlayerListName(ChatColor.DARK_AQUA + "[Helper]" + playerName);
        }else if (grade.equals("modo")) {
            player.setDisplayName(ChatColor.RED + "[Moderateur]" + playerName + ChatColor.WHITE);
            player.setPlayerListName(ChatColor.RED + "[Moderateur]" + playerName);
        }else if (grade.equals("builder")) {
            player.setDisplayName(ChatColor.DARK_GREEN + "[Builder]" + playerName + ChatColor.WHITE);
            player.setPlayerListName(ChatColor.DARK_GREEN + "[Builder]" + playerName);
        }else if (grade.equals("dev")) {
            player.setDisplayName(ChatColor.DARK_PURPLE + "[Developpeur]" + playerName + ChatColor.WHITE);
            player.setPlayerListName(ChatColor.DARK_PURPLE + "[Developpeur]" + playerName);
        }else if (grade.equals("admin")) {
            player.setDisplayName(ChatColor.DARK_RED + "[Admin]" + playerName + ChatColor.WHITE);
            player.setPlayerListName(ChatColor.DARK_RED + "[Admin]" + playerName);
        }else if (grade.equals("star")) {
            player.setDisplayName(ChatColor.GOLD + "[Star]" + playerName + ChatColor.WHITE);
            player.setPlayerListName(ChatColor.GOLD + "[Star]" + playerName);
        }else {
            return;
        }
    }

@teej107 yes of course i registered my events

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Well DRY just went out the window on that one. Did you register your events?

EDIT: Try running the code in a task

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

@teej107 how can I do that ? :/

Ho ! I found the solution ! thanks @teej107 I found how to run the code in a task and it works ! Thank you !
(final code

Code:

@EventHandler
    public void onPlayerJoin(PlayerJoinEvent event) {
        String playerGrade = "default";
        Player player = event.getPlayer();
        if (plugin.getConfig().contains(player.getName())) {
            playerGrade = plugin.getConfig().getString(player.getName() + ".grade");
            player.sendMessage(ChatColor.GOLD + "Votre grade est " + playerGrade);
        }else {
            plugin.getConfig().createSection(player.getName() + ".grade");
            plugin.getConfig().set(player.getName() + ".grade", "default");
            player.sendMessage(ChatColor.RED + "Vous n'avez pas de grade, vous avez donc le grade par defaut");
        }
        final String finalPlayerGrade = playerGrade;
        new Timer().schedule(new TimerTask() {
            @Override
            public void run() {
                ChangeName.changeDisplayName(player, finalPlayerGrade);
            }
        }, 50);

    }

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Oh geez! No you didn't! Take a look into this: http://wiki.bukkit.org/Scheduler_Programming

 

@teej107 I see there are other solutions but this solution work.... But I'll test the other solutions to see which one is the best

 

Bukkit's scheduling system is the best for Bukkit. Use Bukkit's because it's made for Bukkit. Using other scheduling systems may cause your code to not perform as expected.