hi buddy, i have 2.6 years of experience in teaching and development of java.i have created projects like paint app, JSearch Engine,hotel management system, sales monitoring system, etc.
the solution can be done by extracting the list of urls from a particular domain and then by parsing the urls to find out list of subdomain with a pattern based on the root domain name .
so, i am ready to fulfill your requirement.
for any details feel free to contact me on chat.
Thanks & Regards!