Filter a stream of a class using a value of subclass

Question

I have a parent class Company which has a list of Employee objects. I need to create a stream of Parent class who has an Employee

Answer 1

Use anyMatch for a predicate instead of flatMap as:

List<Company> companiesWithEmployeesphone800 =
    companies.stream()
            .filter(loc -> loc.getEmployees().stream()
                    .anyMatch(locnew -> locnew.getPhone().equalsIgnoreCase("800")))
            .collect(Collectors.toList());