Is there a real reason to use Optional.of()?

Question

I\'ve read here why Optional.of() should be used over Optional.ofNullable(), but the answer didn\'t satisfy me at all, so I ask slightly different:

Answer 1

I think you are right with your opinion that you should not use Optional if you are sure that you always have a return-value.

But your method is not sure, that it always returns a value!

Think of an call to getUserById(-1). There is (normally) no User with this id, and your userRepository will return null.

So in this case you should use Optional.ofNullable.

https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html#ofNullable-T-