Small reminder that orElse parameter is evaluated

FunIsOptional.java

import java.util.Optional;

public class FunIsOptional {

    public static void main(String[] args) {
        Integer i = 0;
        System.out.println(Optional.of(i).map(v -> v++).orElse(i--));
        //         => res = 0 (orElse is evaluated even when not empty)
    }

}