Comparator<Student> cgpaComp = (s1, s2) -> Double.valueOf(s2.getCgpa()).compareTo(Double.valueOf(s1.getCgpa()));
    Comparator<Student> nameComp = (s1, s2) -> s1.getFname().compareTo(s2.getFname());
    Comparator<Student> idComp = (s1, s2) -> Integer.valueOf(s1.getId()).compareTo(Integer.valueOf(s2.getId()));

    studentList = studentList.
            stream().
            sorted(cgpaComp.thenComparing(nameComp).thenComparing(idComp)).
            collect(Collectors.toList());