I dont have it in the exemple mod too im using 1.19.2- 43.2.8

Duplicate post.

7 minutes ago, warjort said:

Duplicate post.

yea i accidently post it in tutorial do you know how can i remove it?  btw thank you for the help hahahha

Edited April 23, 20232 yr by YairKro

If you mean the CreativeModeTabEvent.Register event, to register your own tab, you need to create a listener on the mod bus

@Mod.EventBusSubscriber(modid = "your_mod_id", bus = Mod.EventBusSubscriber.Bus.MOD)
public class CreativeTabEvents {
  
  @SubscribeEvent
  public static void onRegisterCreativeTabs(final CreativeModeTabEvent.Register event) {

	event.registerCreativeModeTab(new ResourceLocation("your_mod_id", "tab_name"),
                builder -> builder
                        .icon(() -> new ItemStack(MyModItems.MyItem))
                        .title(Component.translatable("itemGroup." + "your_mod_id" + "." + name)) //you are not forced to this syntax, but it's pretty common
                        .build());
  }
}

Assuming that MyModItems.MyItem is an item in a class of your mod that has all the items (of course you can set it to whatever item or block you want, even vanilla ones).

If, instead, you want to add items to your creative tab, you need to listen to the CreativeModeTabEvent.BuildContents event, in a similar way. In here you want to check which tab is being populated (event.getTab()) and, if is your tab, add as many item stacks as you want using event.acceptAll(itemStacks) method
 

@SubscribeEvent
  public static void onTabBuildContents(final CreativeModeTabEvent.BuildContents event) {
	final CreativeModeTab tab = event.getTab();
  	if(tab.equals(MY_CREATIVE_TAB)) {
      	event.acceptAll(List.of(
      		new ItemStack(MyModItems.MyItem),
        	new ItemStack(MyModItems.MySecondItem)
        	...
      ));
    }
  }

Of course you need to have reference to your tab, so when you register it during the CreativeModeTabEvent.Register event make sure to store the registered tab into a variable so you can use it later on to add items to it.

You can see how I handle my tabs here to get an idea: https://github.com/JimiIT92/MineWorld/blob/master/src/main/java/org/mineworld/core/MWTabs.java