Java Stream: divide into two lists by boolean predicate

Question

I have a list of employees. They have isActive boolean field. I would like to divide employees into two lists: activeEmployees

Answer 1

You can also use groupingBy in this case as there are 2 group posibilities (active and inactive employees):

Map> grouped = employees.stream()
                .collect(Collectors.groupingBy(Employee::isActive));

List activeEmployees = grouped.get(true);
List formerEmployees = grouped.get(false);