Finally, the Maybe type is very similar to the Single type, but the item might not be returned to the subscriber in the end.

The Maybe type can be created in a very similar fashion as before:

Maybe.empty();

Alternatively, it can be created as follows:

Maybe.just("Item");

However, the .subscribe() can be called with arguments dedicated to handling onSuccess (for received items), onError (to handle errors), and onComplete (to do a final action after the item is handled):

Maybe.just("Item")
        .subscribe(
                s -> log("success: " + s),
                throwable -> log("error"),
                () -> log("onComplete")
        );