Please provide comments for the following java code problem

Youve just been hired onto the IT staff at the Best University Ever (BUE). Youre currently working on a website that collects student information, and you want to make sure that the email addresses they provide are valid university emails. BUEs emails are case-insensitive and in this format:

[first initial].[last name][1 or more digits (optional)]@

[1 or more subdomains, each followed by a dot (optional)]bue.edu

The first initial, last name, and subdomains (if present) cannot be blank, and they can contain only letters.

Within a source file named EmailValidator.java, write the static method boolean isValidEmail(String s). This method returns whether s is a valid email address. Here are some examples of valid email addresses:

t.stark@bue.edu

T.stArK420@cs.bue.edu

O.Prime@rigel.CS.bue.edu

s.snape@darkarts.bue.edu

Here are some examples of invalid email addresses:

soccerlover@bue.edu

Missing first initial

k.k.line@bue.edu

Too many first initials

jon.snow@bue.edu

First initial is too many characters

j.snow@van.edu

Wrong university

j.snow@bue.com

No .edu domain BUE is totally not commercial, or so they claim

j.snow2stark@bue.edu

Digits must be after the last name

r.summers@cs2.bue.edu

Subdomain contains a non-letter character

r.summers@.bue.edu

Blank subdomain

x.xXx_Sephiroth_xXx@bue.edu

Last name contains non-letter characters

blargh

What kind of excuse for an email address is this??