hello and thank you to anyone who reads this.
im trying to make a containeritem, it seems it does not work the same in this version.
just to be clear, i do not want to create a gui, i want to create an item which returns to the player inventory or stays in crafting grid after a craft is preformed.
much like the old equivalent exchange philosopher stone, or the juicer from many other mods. and i would like to change damage on craft.

i tried passing hasContainerItem and i could not figure out what i did wrong. (im not great at java and the last time i made a mod was 1.10.2, my mod was not released)

here is base code before i tried properly setting up the constructors (if i do anything else, the class throws errors)

 

Spoiler

raw code

public class UTOContainerItem extends Item
{
    //TODO: make it so i can change all attributes of an item aswell as add tooltips to items in 1 line of code in the init class.
    public UTOContainerItem
            (Properties properties) {
        super(properties);
    }

    @Override
    public void addInformation(ItemStack stack, @Nullable World worldIn, List<ITextComponent> tooltip, ITooltipFlag flagIn) {
        super.addInformation(stack, worldIn, tooltip, flagIn);
    }

    @Override
    public boolean hasEffect(ItemStack stack) {
        return true;
    }

    @Override
    public boolean hasContainerItem(ItemStack stack) {
        return true;
    }
}

 

when i return null and craft an item, i crash (of course)
when i try to return ItemInit.MYITEM, or when i try to return (this) the code is not functional.

so i tried returning itemStack
this allows the crafting to work without crashing but the item is still used up.

    @Override
    public ItemStack getContainerItem(ItemStack itemStack) {
        return itemStack;
    }

this bit of code is the only thing my tiny brain has gotten to work. (by work i mean it didn't crash)

i tried returning a specific item, tried passing the itemstack in the constructor, i tried a few different things. 

 

should i be passing getContainerItem in the init class instead?

 

@Override
    public ItemStack getContainerItem(ItemStack itemStack) {
        return ItemInit.uto_generic_eye;
    }//when i try this, its all errored

when i try to pass a specific item, it errors and becomes unusable.

im finding it hard to find information on this topic, could i maybe find this in the energy api or something?

@Override
    public ItemStack getContainerItem(ItemStack itemStack) {
        return ItemInit.uto_generic_eye;
    }//when i try this, its all errored

This will never work because it is asking for an itemstack, I think you will need to return a damaged itemstack here

 

 

thanks ill do that, i thought i sent this earlier. that totally fixed my issues btw thanks @diesieben07 

@poopoodice i understood that, i was just testing things. 

 

i ended up looking to make sure the item was a container item then if it is i make it one by returning itemstack. 
it was the easiest and most simplistic way to do it.

the issue is fixed now.

 

public class UTOContainerItem extends Item
{
    //TODO: make RepairItemRecipe much more elaborate
    public UTOContainerItem
            (Properties properties) { super(properties); }

    @Override
    public boolean hasEffect(ItemStack stack){return true;}

    @Override
    public void setDamage(ItemStack stack, int damage){}

    @Override
    public boolean isRepairable(ItemStack stack) {
        return super.isRepairable(stack);
    }

    @Override
    public boolean getIsRepairable(ItemStack toRepair, ItemStack repair) {
        return super.getIsRepairable(toRepair, repair);
    }

    @Override
    public boolean hasContainerItem(ItemStack stack){return true;}

    @Override
    public ItemStack getContainerItem(ItemStack itemStack)
    {
        if (!hasContainerItem(itemStack))
        {
            return ItemStack.EMPTY;
        }
        return new ItemStack(getItem());
    }
}

 

59 minutes ago, reapersremorse said:

if (!hasContainerItem(itemStack))

You don't need to do this.

1) getContainerItem is only called if hasContainerItem returns true

2) Its your own god damn item and you already always return true...

9 minutes ago, Draco18s said:

You don't need to do this.

1) getContainerItem is only called if hasContainerItem returns true

2) Its your own god damn item and you already always return true...

i plan to make a more advanced constructor in the future, one where when i initialize items. i can choose container item as a property. doing this now just means i shouldn't have to do it in the future. unless i have to change it. 

Point 1 still remains relevant. You don't need to check again.