When hit add an effect

I'm programming a magic plugin, and i need to make a command that fires an arrow, and what ever that arrow hits (player, or mob) it adds a potion effect here's what i got

Code:

    List<Integer> arrows = new ArrayList<Integer>();
   
    @EventHandler
    public void Shot(PlayerEvent event){
        Player player = event.getPlayer();
        if (((player.hasLineOfSight(player)))) {
            if (player.getItemInHand().getType().getId() == 261)
            {
                arrows.add(player.launchProjectile(Arrow.class).getEntityId());
            }
        }
    }
 
    public void onArrowdamage(EntityDamageByEntityEvent eve)
    {
        Entity damager = eve.getDamager();
        Entity entity = eve.getEntity();
       
        if(!(damager instanceof Arrow))
        {
            return;
        }
       
        if(!arrows.contains(damager.getEntityId()))
        {
            return;
        }
       
        if (entity instanceof Entity)
        {
            //(this is where i think the potion effecting would happen)
        }
       
    }
    @EventHandler
    public void onProjectileHit(ProjectileHitEvent e)
    {
        arrows.remove(e.getEntity().getEntityId());
    }
}

 

Code:java

 List<String> players = new ArrayList<String>();
 
    @EventHandler
    public void onShot(EntityShootBowEvent event){
        if(event.getShooter() instanceof Player){
        Player player = event.getPlayer();
            if (player.getItemInHand().getType().equals(Material.BOW))
            {
                    players.add(player.getName());
            }
        }
}
    }
 
    public void onArrowdamage(EntityDamageByEntityEvent eve)
    {
     if(event.getDamager() instanceof Arrow && (Arrow) event.getDamager().getShooter() instanceof Player){
         Player p = (Player) ((Arrow)event.getDamager().getShooter());
          if(players.contains(p))
            event.getEntity().addPotionEffect(new PotionEffect(PotionEffectType.POISON 10, 10));
    }
    @EventHandler
    public void onProjectileHit(ProjectileHitEvent e)
    {
        if(event.getShooter() instanceof Player && (Player) players.contains(event.getShooter().getName))
            players.remove((Player)event.getShooter().getName));
    }
}

I believe that should work.. untested.

 

umm that had like 30 errors