scheduleSyncDelayedTask Error:

Full Code Of Class:

Code:

package me.frostbyte;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Color;
import org.bukkit.FireworkEffect;
import org.bukkit.FireworkEffect.Type;
import org.bukkit.GameMode;
import org.bukkit.Location;
import org.bukkit.entity.Firework;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.event.entity.EntityDamageEvent;
import org.bukkit.event.entity.FoodLevelChangeEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerLoginEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.FireworkMeta;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

public class PlayerListener implements Listener {

    public PlayerListener(MainClass plugin) {
      
        plugin.getServer().getPluginManager().registerEvents(this, plugin);
    }
  
    @EventHandler
    public void onBlockBreak(BlockBreakEvent event) {
      
        Player player = event.getPlayer();
        if(player.getGameMode() == GameMode.CREATIVE) {
          
            // Allow the player to break blocks if in creative
            event.setCancelled(false);
          
        }else if(player.getGameMode() == GameMode.SURVIVAL) {
          
            event.setCancelled(true);
          
            player.sendMessage(ChatColor.RED.toString() + ChatColor.BOLD + "You cannot break blocks here!");
          
        }
    }
  
    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent event) {
      
        Player player = event.getPlayer();
      
        player.sendMessage(ChatColor.BLUE + "Welcome To FrostByte!");
      
        ItemStack serverItem = new ItemSmith().serverItem(1);
      
        player.getInventory().addItem(serverItem);
      
        player.addPotionEffect(new PotionEffect(PotionEffectType.SPEED, Integer.MAX_VALUE, 0, false, false));
      
        player.setFoodLevel(20);
        player.setHealth(20);
      
        player.teleport(new Location(Bukkit.getWorld("world"), 0, 73, 0));
    }
  
    @EventHandler
    public void onPlayerLogin(final PlayerLoginEvent event) {
        if(!event.getPlayer().hasPlayedBefore()) {
            Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable() {
                public void run() {
                    Firework f = (Firework) event.getPlayer().getWorld().spawn(event.getPlayer().getLocation(), Firework.class);
                  
                    FireworkMeta fm = f.getFireworkMeta();
                    fm.addEffect(FireworkEffect.builder()
                        .flicker(false)
                        .trail(true)
                        .with(Type.CREEPER)
                        .withColor(Color.GREEN)
                        .withFade(Color.BLUE)
                        .build());
                    fm.setPower(3);
                    f.setFireworkMeta(fm);
                }
            }, 20);
        }
    }
  
    @EventHandler
    public void onPlayerLeave(PlayerQuitEvent event) {
        Player player = event.getPlayer();
      
        player.getInventory().clear();
      
        for(PotionEffect effect : player.getActivePotionEffects()) {
            player.removePotionEffect(effect.getType());
        }
    }
  
    @EventHandler
    public void onPlayerDamage(EntityDamageEvent event) {
      
        event.setCancelled(true);
    }
  
    @EventHandler
    public void onPlayerHunger(FoodLevelChangeEvent event) {
        event.setCancelled(true);
    }
}

Description:
onPlayerLogin event, the scheduleSyncDelayedTask has an error that says: "The method scheduleSyncDelayedTask(Plugin, Runnable, long) in the type BukkitScheduler is not applicable for the arguments (PlayerListener, new Runnable(){}, int)"

I got the onPlayerLogin code from a tutorial and most of it I understand. But i do not understand the scheduleSyncDelayedTask, and because I don't understand what it does its difficult to fix it.

It would be great if someone could explain what it does and help me fix it.

 

@Icy_Code
The first parameter needs to be the main class instance. Store the 'plugin' instance from the constructor in a field, and then replace "this" with that field when calling the delayed task.