Method getByNameOrId

src/main/java/net/minecraft/item/Item.java:99–116

Tries to get an Item by it's name (e.g. minecraft:apple) or a String representation of a numerical ID. If both fail, null is returned.

(String id)

     * fail, null is returned.
     */
    public static Item getByNameOrId(String id)
    {
        Item item = itemRegistry.getObject(new ResourceLocation(id));

        if (item == null)
        {
            try
            {
                return getItemById(Integer.parseInt(id));
            }
            catch (NumberFormatException var3)
            {
                ;
            }
        }

        return item;
    }

    /**
     * Called when an ItemStack with NBT data is read to potentially that ItemStack's NBT data