[1.12.2] [SOLVED] Way to yield random item or block?

[Differentiation]

Hey!

I was wondering, is there any way to yield the player with a random item or block from Minecraft or my own mod? Is it just as simple as giving the player a random item by getting a random item id?

Any suggestions are welcome.

Thank you!

Edited January 22, 2018 by Differentiation

[jabelar]

Well, as long as it is valid, yes. But since it is a registry system I wouldn't call it an "id" but rather the "key" for the related collection. So you can get the list of keys from the appropriate registry and then pick a random one from the list. Find the registry and then look at the available methods to get ideas on how to get the keys. Picking a random one then just requires typical Java technique -- I'm pretty sure you can just google "get random entry from Java list" to get examples.

[Draco18s]

s/yield/reward

[Differentiation]

3 hours ago, jabelar said:

Well, as long as it is valid, yes. But since it is a registry system I wouldn't call it an "id" but rather the "key" for the related collection. So you can get the list of keys from the appropriate registry and then pick a random one from the list. Find the registry and then look at the available methods to get ideas on how to get the keys. Picking a random one then just requires typical Java technique -- I'm pretty sure you can just google "get random entry from Java list" to get examples.

But I mean what would be the appropriate registry? How can it include all items and blocks from all the mods that the player has loaded and Minecraft?

[Differentiation]

Thanks guys!

[Differentiation]

7 hours ago, diesieben07 said:

The ForgeRegistries class contains references to all existing registries. It should be straightforward to find out which you need.

Item is a list of all Items and Blocks, or just Items?

List<Item> items = Lists.newArrayList(ForgeRegistries.ITEMS.getValues());
Random rand = new Random();
Item item = items.get(rand.nextInt(items.size()));

 

Edited January 22, 2018 by Differentiation

[Differentiation]

8 minutes ago, diesieben07 said:

Not sure how an IForgeRegistry<Item> is supposed to contain Block instances.

 

Then what does contain item and block instances???

[Differentiation]

Just now, diesieben07 said:

ForgeRegistries.BLOCKS contains all blocks, ForgeRegistries.ITEMS contains all items.

Why do you want both, though? You cannot usefully use them in the same way.

I want the player to obtain a random item or block from right clicking an item.

[Differentiation]

Just now, diesieben07 said:

Please clarify what you mean by "obtaining a block". Where should the block go?

The player's inventory of course, as an ItemStack

[Differentiation]

Just now, diesieben07 said:

Blocks cannot exist as ItemStacks. You want an ItemBlock.

Yes, ItemBlock, but there is no ForgeRegistries list for that, if I stand corrected

[Differentiation]

Just now, diesieben07 said:

ItemBlock extends Item...

........ and??? The list wouldn't give blocks

[Differentiation]

1 minute ago, diesieben07 said:

Please clarify.

The List<Item> still doesn't contain any blocks...

Edited January 22, 2018 by Differentiation

[Differentiation]

Just now, diesieben07 said:

It will contain ItemBlock instances. Not Block instances.

ItemBlock being the inventory item of a "block"?

[Differentiation]

6 minutes ago, diesieben07 said:

Yes.

Thank you! That makes everything clear now.