Explosive Sheep (Sheepwars)

private HashMap<Sheep, Integer> launchedEntities = new HashMap<Sheep, Integer>();
    private HashMap<Integer, Sheep> tasksEntities = new HashMap<Integer, Sheep>();

    @EventHandler
    public void listen(PlayerInteractEvent e){
        Player p = e.getPlayer();
        if(e.getAction() == Action.RIGHT_CLICK_AIR || e.getAction() == Action.RIGHT_CLICK_BLOCK){
            if(e.getItem() == null)return;
            if(e.getItem().getType() != Material.WOOL || e.getItem().getItemMeta() == null || !e.getItem().getItemMeta().getDisplayName().contains("Mouton Explosif")) return;

            Sheep s = (Sheep) p.getWorld().spawnEntity(p.getLocation(), EntityType.SHEEP);
            Vector v = new Vector(p.getLocation().getDirection().getX(), p.getLocation().getDirection().getY(), p.getLocation().getDirection().getZ());
            v.multiply(5);
            s.setVelocity(v);
            s.setColor(DyeColor.RED);
            s.setCustomName("§cMouton Explosif");

            int cooldown = 6;//Temps avant l'explosion
            launchedEntities.put(s, cooldown);
            launchTask(s);
        }
    }

    private void launchTask(final Sheep s){
        new BukkitRunnable(){
            @Override
            public void run() {
                if(!tasksEntities.containsKey(this.getTaskId())){
                    tasksEntities.put(this.getTaskId(), s);
                }
                Sheep s = tasksEntities.get(this.getTaskId());
                int cooldown = launchedEntities.get(s);
                cooldown--;
                switch (cooldown){
                    case 0://Explosion
                        s.setColor(DyeColor.RED);
                        tasksEntities.remove(this.getTaskId());
                        s.getWorld().createExplosion(s.getLocation(), 4F);//Creation de l'explosion
                        s.remove();//On enlève le mouton
                        this.cancel();
                        break;
                    case 1:
                        s.setColor(DyeColor.WHITE);
                        break;
                    case 2:
                        s.setColor(DyeColor.RED);
                        break;
                    case 3:
                        s.setColor(DyeColor.WHITE);
                        break;
                    case 4:
                        s.setColor(DyeColor.RED);
                        break;
                    case 5:
                        s.setColor(DyeColor.WHITE);
                        break;
                    default:
                        break;
                }
                launchedEntities.remove(s);
                if(cooldown != 0){
                    launchedEntities.put(s, cooldown);
                }
            }
        }.runTaskTimer(Bukkit.getPluginManager().getPlugin("SheepWars"), 0, 20);
    }