Observable which does not pass anything in onNext()

Question

I would need an Observable, for example to provide a system clock, which does not need to pass anything in onNext(). I couldn\'t find a signature that would allow me to do that.

Answer 1

RxJava 2 Wiki:

RxJava 2.x no longer accepts null values and the following will yield NullPointerException immediately or as a signal to downstream.

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This means that Observable can no longer emit any values but only terminate normally or with an exception. API designers may instead choose to define Observable