I want to make an item with damage. With different damage, it represent different item, like wool and wood.

But when I craft the item with damage 2, it auto combine with the item with damage 1 when using Shift+Click. But when I take it from the crafting table(custome crafting table, don't know if it's related), they are different, and can not combine together.

Which method should I override to prevent the item from combine automatically between item with different damage?

And I found when I pick the item up on the ground, it will combine with my inventory item that with different damage too.

Item#setHasSubtypes(true)

 

You need that so merging check for the item damage beforehand.

Yeah I found it.

thanks.