Creating a Tag

Creating an ItemTag

public class MyTags {
    public static final DeferredRegistry<Tag<?>> TAGS = DeferredRegistry.create(Registries.TAGS, "plugin_id");
    
    public static final Holder<Tag<?>> MY_TAG = TAGS.register("my_tag", ItemTag::new);
}

Then apply the registry inside your onEnable().

Creating a BlockTag

public class MyTags {
    public static final DeferredRegistry<Tag<?>> TAGS = DeferredRegistry.create(Registries.TAGS, "plugin_id");

    public static final Holder<Tag<?>> MY_BLOCK_TAG = TAGS.register("my_tag", BlockTag::new);
}

Using Tags

Adding an item/block to the tag:

(ItemTag MyTags.MY_TAG).add(ItemStack);
(BlockTag MyTags.MY_BLOCK_TAG).add(BridgeBlock<?>);

Checking if an item/block has a given Tag:

(ItemTag MyTags.MY_TAG).contains(ItemStack);
(BlockTag MyTags.MY_BLOCK_TAG).contains(BridgeBlock<?>);

You can also make your own Tags by extending Tag<> class and implementing all the methods and then using that instead of ItemTag and BlockTag.

03 October 2025