Implementing AccountHandlerJDBC

Hello,=20
=20
I need to create a database to store account information and use=20
AccountHandlerJDBC to link it to sourceID.java. But after reading the Use=
r's=20
guide-part Implementing an AccountHandler- I still don't have the idea ho=
w to=20
make it. Where should I create the database tables? What are all the file=
s I=20
need to modify in order to use AccountHandlerJDBC instead of=20
AccountHandlerInMemoryImpl? Do I need to create some file by myself? Sorr=
y, I=20
am really lack of experience. Thank you very much for your warm help in=20
advance!=20
=20
Wei Yan=20