@EventHandler
    public void itemCraft(CraftItemEvent event) {
        Material res = event.getRecipe().getResult().getType();

        if(res == Material.STONE_SWORD) craftedSword = true;
        if(res == Material.STONE_PICKAXE) craftedPickaxe = true;
        if(res == Material.STONE_SPADE) craftedShovel = true;
        if(res == Material.STONE_AXE) craftedAxe = true;

        if(craftedSword && craftedPickaxe && craftedShovel && craftedAxe) {
            achieve();
        }
    }