How to do an action if an optional boolean is true?

Question

In Java 8, I have a variable, holding an optional boolean.

I want an action to be executed, if the optional is not empty, and the contained boolean is true.

I am dreaming about something like ifPresentAndTrue, here a full example:

import java.util.Optional;

public class X {
  public static void main(String[] args) {
    Optional<Boolean> spouseIsMale = Optional.of(true);
    spouseIsMale.ifPresentAndTrue(b -> System.out.println("There is a male spouse."));
  }
}

Answer 1

For good order

if (spouseIsMale.orElse(false)) {
    System.out.println("There is a male spouse.");
}

Clear.

Answer 2

It is possible to achieve that behaviour with .filter(b -> b):

spouseIsMale.filter(b -> b).ifPresent(b -> System.out.println("There is a male spouse."));

However, it costs some brain execution time seconds to understand what is going on here.

Answer 3

For those looking to write this without traditional if(condition){ //Do something if true; }

Optional.of(Boolean.True)
    .filter(Boolean::booleanValue)
        .map(bool -> { /*Do something if true;*/ })