hide all players

Hey guys,
I'd like to make a lobby, where everybody hide or show everyone.
Don't know how to explain my problem so I use an example:
On a server are 4 players. I join and want to hide them. It works.

Another example:
On a server are 4 players. I join. Example-Player "abc123" joins. I want to hide all. Everyone is hidden except "abc123".

My question:
How to hide all players, if there joined X Players after me?

My current code:

Main:

Code:

public class Main extends JavaPlugin
{
    public static ArrayList<Player> hidden = new ArrayList<Player>();
  
    @Override
    public void onEnable()
    {
        PluginManager pm = this.getServer().getPluginManager();
        pm.registerEvents(new L_onRightClick(), this);
    }
}

Item Click Listener:

Code:

if(e.getCurrentItem().getType() == Material.WOOL)
            {
                if(e.getCurrentItem().getDurability() == 5)
                {
                    for(Player players : Bukkit.getOnlinePlayers())
                    {
                        if(Main.hidden.contains(p))
                        {
                            Main.hidden.remove(p);
                            p.showPlayer(players);
                            p.sendMessage("§aAll players visible");
                        }
                    }
                }
                else if(e.getCurrentItem().getDurability() == 14)
                {
                    for(Player players : Bukkit.getOnlinePlayers())
                    {
                        if(!Main.hidden.contains(p))
                        {
                            Main.hidden.add(p);
                            p.hidePlayer(players);
                            p.sendMessage("All players hidden!");
                        }
                    }
                }
              
                e.getView().close();
            }

(it's in an inventory)

 

You have to use the playerjoinevent.
For those who are in the 'hidden' list, hide the player that just joined.

Also note that 'players' is a single object here.
In some other languages you would have to write 'foreach(Class varName in someList)', just fyi.

 

@adventuretc You mean I should write in the PlayerJoinEvent:

Code:

public void playerJoin(PlayerJoinEvent e)
{
    Player p = e.getPlayer();
    for(Player pil : Main.hidden)
    {
        pil.hidePlayer(p);
    }
}

?

 

Add this player to a arraylist or hashmap

 

@NeguinDaFarofa you mean, that I have a arraylist/hashmap with all players?

 

If if you want to leave an unknown player (random) visible, creates a hash with all players and take a random system.

If you want a specific, the simplest way I know is to create a command or something that select the one player in a hash.

 

@NeguinDaFarofa but I want to hide all players..

 

then use

Code:

 for (Player other : Bukkit.getServer().getOnlinePlayers()) {
                            player.hidePlayer(other);

 

Yes.

 

I think you doesn't understand right. I have a server. On that server are 4 people. If I join, I want's to see them all (line normaly). If I use the Hide item, I want's to hide everyone. If I use it again, everyone is shown. If Hide-mode is turned off (I see everyone) and another player joins, and I turns the Mode on again. Every user is hidden, except the player who joins after me. Thats my problem. I want's to know how I can hide him too.

 

I understand that. The above code does exactly that.
If you have hidden the players it will hide the new player, that's all.