public static Item getItemByText(ICommandSender sender, String id) throws NumberInvalidException
    {
        ResourceLocation resourcelocation = new ResourceLocation(id);
        Item item = (Item)Item.itemRegistry.getObject(resourcelocation);

        if (item == null)
        {
            throw new NumberInvalidException("commands.give.notFound", new Object[] {resourcelocation});
        }
        else
        {
            return item;
        }
    }