I did a google search, but could only find posts from 2016 and earlier. They suggested using

@Override
public void addInformation(ItemStack itemstack, World world, List<ITextComponent> list, ITooltipFlag flag) {
	super.addInformation(itemstack, world, list, flag);
	list.add(new StringTextComponent("lore"));
}

but in my custom item class, which extends Item, addInformation doesn't override any methods.

Is this outdated or am I just using it the wrong way?

 

Solution:

@Override
public void appendHoverText(ItemStack pStack, @Nullable Level pLevel, List<Component> pTooltipComponents, TooltipFlag pIsAdvanced) {

    pTooltipComponents.add(new TextComponent("lore"));
      
    super.appendHoverText(pStack, pLevel, pTooltipComponents, pIsAdvanced);
}

 

Edited November 27, 20213 yr by NeverGonnaGiveYouUp
found solution

the method is in 1.17 Item#appendHoverText called