You need to check the version of your Java Combined Client (JCC) installed? Try this way:

// The following command will retrieve the JCC driver version if executed from the command line: 
java com.ibm.db2.jcc.DB2Jcc -version 

//Or for drivers that are not yet installed: 
java -cp ./db2jcc.jar com.ibm.db2.jcc.DB2Jcc -version 

//Content of db2jcc JAR file:
jar -tvf db2jcc.jar

All DB2 JDBC Driver versions, see here!

More information on DB2, Java, JDBC and JCC.