Q: What jdbc driver should I use for DB2?

A: The DB2 driver comes with the database, the file is db2java.zip under the
   folder /SQLLIB/java. 
   Note that, even if the database is on the same local machine, it is better
   to use COM.ibm.db2.jdbc.net.DB2Driver, not COM.ibm.db2.jdbc.app.DB2Driver 
   The url is jdbc:db2://database_hostname/bugzero_db, where database_hostname
   can be localhost.