player first join message in actionbar, help?

hello
i had an couple of problems with this plugin and now the problems are defeated.
but now i want that as players never played before on my server that they a first joining message in the actionbar see.
and this is the first time with an actionbar. and ofcourse first joining plugin coding

how to add it in my build?

Code (Text):

public class actionbar implements Listener {
    private PacketPlayOutChat packet;
   
    public actionbar(String message){
        PacketPlayOutChat packet = new PacketPlayOutChat(ChatSerializer.a("{\"text\": \"" + message + "\"}"), (byte) 2);
        this.packet = packet;
    }
   
    public void Send(Player player){
        ((CraftPlayer) player).getHandle().playerConnection.sendPacket(packet);
    }
   
   
    @EventHandler
    public void onJoin(PlayerJoinEvent e){
        Player player = e.getPlayer();
        actionbar ab = new actionbar("§2Welcome back " + ChatColor.RED + p.getDisplayName() + ChatColor.WHITE + "!");
        ab.Send(player);      
    }
   

}

 

i have no idea how to add it...
i have this now in my build:

Code (Text):

    public void onlogin(PlayerLoginEvent e){
        Player player = e.getPlayer();

and how to go further?

 

and how should i add that?
and this is my first time with that method.

EDIT.
o like that?
alright then i give it a try

 

i added on the way you say. but i got only an error on the PlayerLoginEvent. and i have 1 JoinEvent and 1 LoginEvent. but i don't know what the error means...
here's my error:

Code (Text):

[14:53:44] [Server thread/ERROR]: Could not pass event PlayerLoginEvent to ActionBar_welcome v1
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[minecraft.jar:git-Spigot-d276ab1-d219213]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[minecraft.jar:git-Spigot-d276ab1-d219213]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at net.minecraft.server.v1_11_R1.PlayerList.attemptLogin(PlayerList.java:501) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at net.minecraft.server.v1_11_R1.LoginListener.b(LoginListener.java:121) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at net.minecraft.server.v1_11_R1.LoginListener.F_(LoginListener.java:57) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at net.minecraft.server.v1_11_R1.NetworkManager.a(NetworkManager.java:233) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at net.minecraft.server.v1_11_R1.ServerConnection.c(ServerConnection.java:140) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at net.minecraft.server.v1_11_R1.MinecraftServer.D(MinecraftServer.java:842) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at net.minecraft.server.v1_11_R1.DedicatedServer.D(DedicatedServer.java:399) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:678) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:576) [minecraft.jar:git-Spigot-d276ab1-d219213]
    at java.lang.Thread.run(Unknown Source) [?:1.8.0_121]
Caused by: java.lang.NullPointerException
    at actionbar.actionbar.Send(actionbar.java:23) ~[?:?]
    at actionbar.actionbar.onLogin(actionbar.java:32) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_121]
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_121]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_121]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_121]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:302) ~[minecraft.jar:git-Spigot-d276ab1-d219213]
    ... 13 more
[14:53:44] [Server thread/INFO]: _Chazzie_[/127.0.0.1:56749] logged in with entity id 2314 at ([world]-77.5, 68.0, 222.5)

and here's my build:

Code (Text):

package actionbar;

import org.bukkit.ChatColor;
import org.bukkit.craftbukkit.v1_11_R1.entity.CraftPlayer;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerLoginEvent;

import net.minecraft.server.v1_11_R1.IChatBaseComponent.ChatSerializer;
import net.minecraft.server.v1_11_R1.PacketPlayOutChat;

public class actionbar implements Listener {
    private PacketPlayOutChat packet;
 
    public actionbar(String message){
        PacketPlayOutChat packet = new PacketPlayOutChat(ChatSerializer.a("{\"text\": \"" + message + "\"}"), (byte) 2);
        this.packet = packet;
    }
 
    public void Send(Player player){
        ((CraftPlayer) player).getHandle().playerConnection.sendPacket(packet);
    }
 
    @EventHandler
    public void onLogin(PlayerLoginEvent e){
        Player player = e.getPlayer();
        actionbar ab1 = new actionbar(ChatColor.GREEN + "Welcome new player! Have fun!");
         
        if (!player.hasPlayedBefore()){
            ab1.Send(player);
        }
    }
 
    @EventHandler
    public void onJoin(PlayerJoinEvent e1){
        Player player = e1.getPlayer();
        actionbar ab2 = new actionbar("§2Welcome back " + ChatColor.RED + player.getName() + ChatColor.WHITE + "!");
        ab2.Send(player);
    }
}

What did i wrong? that the new player join message doesn't work? only the normal message does work

EDIT:
it is working now! that playerloginevent must be playerjoinevent. playerloginevent doesn't work in 1.11 i think.