Please Help me with an EggThrowEvent CMD | Command

Hello!
I wanna write a funny CMD for my Server but it does not work out ;(
It is supposed to enable / disable an EggThrowEvent with which you can spawn many entities with.
I appreciate the help!

The code:

Code:

package de.asaster.system.commands;

import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.*;
import org.bukkit.event.player.PlayerEggThrowEvent;

public class egg_cmd implements CommandExecutor {

    public boolean eventOn;

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {

        Player p = (Player) sender;

        if (sender instanceof Player) {
            if (p.hasPermission("perm.chicken")) {

                if (args.length == 1) {

                    if (args[0].equalsIgnoreCase("on")) {
                        eventOn = true;

                    } else if (args[0].equalsIgnoreCase("off")) {
                        eventOn = false;

                    }
                } else if (args.length < 1) {
                    p.sendMessage("use /egg <on> <off>");

                } else if (args.length > 1) {
                    p.sendMessage("use /egg <on> <off>");

                }
            }

        } else {

            sender.sendMessage("this is an in-game CMD");

        }

        return false;

    }

    @EventHandler
    public boolean onEvent(PlayerEggThrowEvent e) {
        Player p = e.getPlayer();
        if (p.hasPermission("server.vollidiot")) {
            e.setHatching(true);
            e.setNumHatches((byte) 20);
            e.setHatchingType(EntityType.CHICKEN);

        }
        if (eventOn == true) {

            return true;
        } else if (eventOn == false) {

            return false;
        }
        return eventOn;

    }

}