How to map an OptionalLong to an Optional?

Question

I have an instance of OptionalLong. But one of my libraries requires an Optional as a parameter.

How can I convert my Option

Answer 1

One more possibility, though only from JDK 9 is via the new OptionalLong.stream() method, which returns a LongStream. This can then be boxed to a Stream:

OptionalLong optionalLong = OptionalLong.of(32);
Optional optional = optionalLong.stream().boxed().findFirst();

With JDK 8 something similar can be done, by stepping out to the Streams utility class in Guava:

Optional optional = Streams.stream(optionalLong).boxed().findFirst();