javascalascala-java-interop

Convert Scala Option to Java Optional

I need to convert Scala Option to Java Optional. I managed to wrote this: 

public <T> Optional<T> convertOption2Optional(Option<T> option) {
    return option.isDefined() ? Optional.of(option.get()) : Optional.empty();
}

But I don't like it.

Is there a simple way to do it, or a built-in scala converter? I'm looking for something like: 

Options.asJava(option);
Solution

  • The shortest way I can think of in Java is:

    Optional.ofNullable(option.getOrElse(null))

    @RégisJean-Gilles actually suggested even shorter if you are writing the conversion in Scala:

    Optional.ofNullable(option.orNull)

    By the way you must know that Scala does not support Java 8 until Scala 2.12, which is not officially out yet. Looking at the docs (which may change until the release) there is no such conversion in JavaConversions.