Hi, i made my custom tool and i want the only enchantments to be applicable on this tool Unbreaking, Mending and Fortune.

 

I've already disabled unwanted enchantmens on Enchanting table, but i can put ANY enchant on it using Anvil and Enchanted book, and i don't want this.

 

Thanks for any help

This took me oh so long to find.

 

    /**
     * Allow or forbid the specific book/item combination as an anvil enchant
     *
     * @param stack The item
     * @param book The book
     * @return if the enchantment is allowed
     */
    public boolean isBookEnchantable(ItemStack stack, ItemStack book)
    {
        return true;
    }

 

By which I mean I opened up the Item class and searched for "Enchantment" and it was the first result.

ok, i tried this:

@Override
public boolean isBookEnchantable(ItemStack stack, ItemStack book) {
	Utils.getLogger().info(EnchantmentHelper.getEnchantments(book));
	if(EnchantmentHelper.getEnchantments(book).containsKey(Enchantments.UNBREAKING) || EnchantmentHelper.getEnchantments(book).containsKey(Enchantments.MENDING) || EnchantmentHelper.getEnchantments(book).containsKey(Enchantments.FORTUNE)){
		return true;
	}
	return false;
}

 

But when i use any book containing one of the right enchantments it passes ALL of it's enchantments on the tool including the wrong ones and when i try to use book that doesn't contain any of the allowed enchantments, the game crashes ¯\_(ツ)_/¯

reverse your if statement.

All you're doing is asking if the book has Mending, Unbreaking, or Fortune, and allowing the whole book to go through.  You need to ask if it contains an enchantment that is not one of those.