@EventHandler
    public void onIventoryClick(InventoryClickEvent e)
    {
        BukkitScheduler scheduler = Bukkit.getServer().getScheduler();
        scheduler.scheduleSyncDelayedTask(this, new Runnable() {
            @Override
            public void run() {
                if (e.getInventory() instanceof CraftingInventory)
                {
                    CraftingInventory inv = (CraftingInventory) e.getInventory();
                    ItemStack[] matrix = inv.getMatrix();
                    String[] displayNames = new String[9];
                    Material[] materials = new Material[9];
                    for (int i = 0; i < 9; i++)
                    {
                        if (matrix[i].hasItemMeta() && matrix[i].getItemMeta().hasDisplayName())
                            displayNames[i] = matrix[i].getItemMeta().getDisplayName();
                        materials[i] = matrix[i].getType();
                    }
                            for (String s : displayNames)
                        if (s != null)
                            System.out.println(s);
                        else
                            System.out.println("null");
                    System.out.println("break");
                    for (Material m : materials)
                        if (m != null)
                            System.out.println(m.name());
                        else
                            System.out.println("null");
                }
            }
        }, 20L);

    }