public class Diggu {

    class Employee{
        private int id;
        private String name;
        public Employee(int id, String name){
            this.id = id;
            this.name = name;
        }

        public int getId() {
            return id;
        }

        public void setId(int id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }



    }

    public void ra(){
        List<Employee> employee = Arrays.asList(new Employee(1, "John"), new Employee(3, "JOHN"), new Employee(2, "BOB"));
        System.out.println(""+ employee.size());
        List<Employee> unique = employee.stream()
                                .collect(collectingAndThen(toCollection(() -> new TreeSet<>(comparing(Employee::getName))),
                                                           ArrayList::new));
        System.out.println(""+ unique.size());
    }
    public static void main(String[] args) {
        new Diggu().ra();
    }
}