Let us consider the issue closed. This conversation was becoming
more didactic on "civil courtesy" than "java" (i opened the last few
mails in the hope of getting more insights/perspectives into
Polymorphims, but instead found ppl's views on courtesy).

Privately I concur with Chris that there should be a response from
the person who posts queries. Dunno abt others, but it gives my
vanity a pleasant stimulation to know that my suggestion worked ;-
) . In other cases, when the suggestion is wrong/incomplete, it is a
good learning  experience if the person posts the final answer to his
query.