Java uses Stream to set sequence numbers to elements of list

List<Student> finalList=new ArrayList<>();
list1.stream().forEach(z->{
list2.stream().filter(j->Objects.equals(z.getId(), j.getId())).findFirst().ifPresent(i->{
    i.setName(z.getName());
    i.setAge(z.getAge());
    finalList.add(i);
});
});

how do I set the sequence number to I?

Mar.02,2021
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