Java Lambda

printPersons(
    roster,
    (Person p) -> p.getGender() == Person.Sex.MALE
        && p.getAge() >= 18
        && p.getAge() <= 25
);
 
// or
p -> {
    return p.getGender() == Person.Sex.MALE
        && p.getAge() >= 18
        && p.getAge() <= 25;
}

Lambda Expressions (The Java™ Tutorials > Learning the Java Language > Classes and Objects)