problem with stored procedure ,transaction and jdbc

Hello everyone,
     I have a probem with stored procedure ,transaction and JDBC.
i am confused with the relation between stored procedure, transcation
and jdbc.

supposed I have code looks like:

     set autocommit to false
     call strored procedure 1
     call strored procedure 2
     when I call the second stored procedure, exception raised
     so I close the connection and the callable statement.

My question is can I enclose the two stored procedure in a parent
transcaton
use JDBC ? If not , why?

Regards
Jiang