Solved HELP! PlayerJoinEvent doesnt seem to be working??

So I'm new to all this and have looked at many tutorials that involve what I want but no matter what i do i cant get what I want.

What i want to happen: When a player joins the plugin checks the players name and if it is a certain name broadcast a message or execute a command

What is happening: No broadcast/execution.

My Main.java(this is just a start, but im slowly making my own deny all spam/hacked accounts plugin)
"Sup3rNinj4" is my MC and i was using it to test but it doesnt check the name as i would like it to..

Code:

package me.Sup3r.DenySpambots;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;

public class Main extends JavaPlugin implements Listener {

    @Override
    public void onEnable() {
        Bukkit.getPluginManager().registerEvents(this, this);
        getServer().getPluginManager().registerEvents(this, this);
    }
   
    @Override
    public void onDisable() {
       
    }
   
   
    //LISTENER CODE
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
       
        if (cmd.getName().equalsIgnoreCase("BLANK") && sender instanceof Player) {
           
            Player player = (Player) sender;
           
            return true;
           
        }
       
        return false;   
       
    }
    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent e) {

        if(e.getPlayer().getDisplayName() == "Sup3rNinj4"){
            for (Player player : Bukkit.getOnlinePlayers())
            {
              player.sendMessage(ChatColor.BLACK + "[" + ChatColor.RED + ChatColor.BOLD + "Deny" + ChatColor.BLACK + "]" + ChatColor.GOLD + " Player: " + ChatColor.AQUA + ChatColor.ITALIC + "Sup3rNinj4" + ChatColor.GOLD + " Is a " + ChatColor.RED + ChatColor.BOLD + "Hacked Account");
            }
        }
    }
   
}

 

I am not sure how much of the problem this is, however you have this:

if(e.getPlayer().getDisplayName()=="Sup3rNinj4"){

the == does not the contents of a string, it tests objects (I Think) but try switching it to

if(e.getPlayer().getDisplayName().equals("Sup3rNinj4")){

 

Thank you, this works! Sends the message twice but ill see what i can do about that.

I got a bigger problem ahead of me but im sure i can find a way