Plz reply !! manipulate JDBC Datasources from a java application or servlet

While working with a J2EE application server, how can i manipulate - add, delete, update and explore - JDBC Datasources from a java application or servlet?
[176 byte] By [msohaib] at [2007-9-26 1:25:38]
# 1
Use JNI or use Runtime.exec(), or find a 3rd party (sun doesn't have one) library that already does that.
jschell at 2007-6-29 1:07:24 > top of Java-index,Archived Forums,Java Programming...
# 2
can you please explain how this can be done using JNI or Runtime.exec()?
msohaib at 2007-6-29 1:07:24 > top of Java-index,Archived Forums,Java Programming...