This is the first time I have done meta items. Everything works, except the first subitem appears in in the creative inventory 'Delete Item' slot, and at the end of every creative tab.
For testing purposes, I stripped the class down to the essentials, but the error persists.

 

	public static ItemStack item1;
    public static ItemStack item2;

    public DTTest(String name)
    {
		this.setUnlocalizedName(Reference.MOD_ID + ":" + name);
		this.setCreativeTab(DTCreativeTab.DT_TAB);
		this.setMaxDamage(0);
		setContainerItem(this);
		setHasSubtypes(true);
	    
		item1 = new ItemStack(this);
		item1.setItemDamage(0);
        
		item2 = new ItemStack(this);
		item2.setItemDamage(1);
    }

    @SideOnly(Side.CLIENT)
    @Override
    public void getSubItems(CreativeTabs tab, NonNullList<ItemStack> items)
    {
        items.add(item1);
        items.add(item2);
    }

 

The item is registered thusly, and called during preInit (haven't switched to events yet):

public static Item test = new DTTest(Names.Items.TEST);

ForgeRegistries.ITEMS.register(test.setRegistryName(Names.Items.TEST));

 

Edited July 16, 20178 yr by PegBeard

Item#getSubItems is now called for every Item on every creative tab, you need to call Item#isInCreativeTab and only add the items to the list if it returns true.

 

It's also no longer a client-only method, you should remove the @SideOnly annotation from it.

Oh. Ok. Thank you.

Okay, so I would really like to know why people use # in front of function calls when describing them, instead of the period you ACTUALLY use. But regardless, Item.isInCreativeTab does not appear to exist in forge-1.12-14.21.1.2443. How does one go about resolving this problem? - As I'm having it too.

24 minutes ago, Sataniq said:

Okay, so I would really like to know why people use # in front of function calls when describing them, instead of the period you ACTUALLY use.

Because the method is not a static method:

Item.isInCreativeTab() can't be invoked directly.

You need an instance:

Item i = ...;

i.isInCreativeTab();

Ah, I see. I have a reference to an item but the function still doesn't show in the IDE's suggestions list. I've found it in the Item class, but it's protected. My item does extend a class that extends net.minecraft.item.Item, so surely this should be visible to me? I'm not sure if IDEA is being strange, or I'm just being stupid. Also, how do we actually get the single ItemStack in the getSubItems() function? It's passing a NonNullList<ItemStack>

 

EDIT: I figured I had to cast the item to the class type to get access to the function. This is why you don't program at 8am

Edited December 18, 20177 yr by Sataniq
I derped

I resolved this, like so:

 

@Override
public void getSubItems (CreativeTabs tab, NonNullList<ItemStack> items)
  {
    if (getCreativeTab() != tab) return;
    super.getSubItems(tab, items);
    items.add(new ItemStack(this, 1, 1));
  }