Jump to content

Need help understanding this [1.15.1]


Recommended Posts

    public void read(CompoundNBT tag) {
        CompoundNBT invTag = tag.getCompound("inv");

    public CompoundNBT write(CompoundNBT tag) {
        CompoundNBT compound = getHandler().serializeNBT();
        tag.put("inv", compound);
        return super.write(tag);

    private ItemStackHandler getHandler() {
        if (handler == null) {
            handler = new ItemStackHandler(1);
        return handler;

    public <T> LazyOptional<T> getCapability(@Nonnull Capability<T> cap) {
        if (cap == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY) {
            return LazyOptional.of(() -> (T) getHandler());
        return super.getCapability(cap);


I've been watching YouTube tutorials and when trying to make a tile entity block which holds items, he wrote this. Could someone clarify what is going on in this section of code? Thanks.

Link to comment
Share on other sites

6 minutes ago, diesieben07 said:
  • You can learn more about capabilities in the documentation.
  • The lazy initialization in getHandler is pointless. LazyOptional is already lazy. Plus you are calling getHandler in readFromNbt, which is like, the first thing that happens in a tile entity. So there isn't even any point lazily initializing the handler. Just create it in the constructor and use a final field.


Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.