List<String> items = new ArrayList<>();
        items.add("STONE_SLAB");

            for (Crafting string : Crafting.values()) {

                String stringtes = string.toString();

                for (int i = 0; i < e.getInventory().getSize(); i++) {
                    ItemStack[] itemStack = e.getInventory().getContents();
                    if (itemStack[i] != null)
                        if (itemStack[i].getAmount() > 1 || itemStack[i].getAmount() < itemStack[i].getMaxStackSize()) {
                            for (String item : items) {
                                //if (stringtes.equals(itemStack[i].getType().toString()) && i >= Crafting.valueOf(itemStack[i].getType().toString()).getAmontNeededCrafting() || (stringtes.equals(itemStack[i].getType().toString()) && i >= Crafting.valueOf(itemStack[i].getType().toString()).getAmontNeededCrafting1() && i >= Crafting.valueOf(itemStack[i].getType().toString()).getAmontNeededCrafting2()))
                                //System.out.println(Crafting.valueOf(stringtes) + item);
                                if (itemStack[i].getType().toString().equals(Crafting.valueOf(stringtes).getmatrialName()) && Crafting.valueOf(stringtes).getmatrialNames1() == null && Crafting.valueOf(stringtes).getmatrialNames2() == null) {
                                    System.out.println("if it works");
                                    if (item.equals(String.valueOf(Crafting.valueOf(stringtes)))) {
                                        System.out.println(string + " " + Crafting.valueOf(stringtes).getmatrialName() + " " + Crafting.valueOf(stringtes).getAmontNeededCrafting() + " " + Crafting.valueOf(stringtes).getNumberOutput());
                                        e.getInventory().remove(itemStack[i]);
                                        Material getmatrialName = Material.valueOf(Crafting.valueOf(stringtes).name());
                                        System.out.println("matrial" + getmatrialName);
                                        e.getInventory().addItem(new ItemStack(getmatrialName, itemStack[i].getAmount()));
                                    }
                                } else if (itemStack[i].getType().toString().equals(item) && itemStack[i].getType().toString().equals(Crafting.valueOf(stringtes).getmatrialName()) && Crafting.valueOf(stringtes).getmatrialNames1() != null && Crafting.valueOf(stringtes).getmatrialNames2() != null)
                                    if (i >= Crafting.valueOf(itemStack[i].toString()).getAmontNeededCrafting() && i >= Crafting.valueOf(itemStack[i].toString()).getAmontNeededCrafting1() && i >= Crafting.valueOf(itemStack[i].toString()).getAmontNeededCrafting2())
                                        System.out.println("null");

                                //System.out.println("inventoryser " + itemStack[i]);

                                //e.getInventory().remove(itemStack[i]);
                                //e.getInventory().addItem(new ItemStack(Material.STONE_STAIRS, itemStack[i].getAmount()));
                                // then here we are. If you put any itemstack (other than AIR) in top inv
                            }
                        }

                }
            }