Is it possible to Create stream and filter in java 7

JKowal34 :

I have a list

List<Person> persons =
    Arrays.asList(
        new Person("Max", 4),
        new Person("Peter", 2),
        new Person("Pamela", 3),
        new Person("David", 9));

I'd like to create Stream and filter the list by a field, something like in java 8:

persons
    .stream()
    .filter(p -> p.age >= 18)

Ricola :

Create a Stream is impossible but you could still use Guava's filter (Collections2.filter() or Iterables.filter() depending on what you'll do with the result) combined with Guava's Predicate

Predicate<Person> predicate = new Predicate<Person>() {
        @Override
        public boolean apply(Person person) {
            return person.age >= 18;
        }
    };
Collection<Person> result = Collections2.filter(persons, predicate);

If you'd like more info about Guava's filter and transform, I got my source from here : https://www.baeldung.com/guava-filter-and-transform-a-collection