What are these .jar files for

All,

I'm working with IBM to get DB2 Web Query to run. IBM is telling me that
some 'suspect' .jar files in the /qibm/userdata/java400/ext directory could
be a problem. I am to identify the applications using these files and move
them to the proper applications directory.

I know zero about java. I have no idea where to begin or how to determine
if they are even used at all.

The suspect files are

activation.jar 55kb
Creation date/time . . . . . : 04/26/07 15:57:12
Last access date/time. . . . : 08/16/18 08:11:30
Data change date/time. . . . : 04/19/06 08:11:06
Attribute change date/time . : 12/21/17 13:53:51

mail.jar 349kb
Creation date/time . . . . . : 04/26/07 15:57:42
Last access date/time. . . . : 08/16/18 08:11:30
Data change date/time. . . . : 04/19/06 08:13:42
Attribute change date/time . : 12/21/17 13:53:51

poi-3.2-FINAL-20081019.jar 1.36mb
Creation date/time . . . . . : 11/07/08 13:20:39
Last access date/time. . . . : 08/16/18 08:11:30
Data change date/time. . . . : 11/07/08 13:20:39
Attribute change date/time . : 12/21/17 13:53:51

poi-contrib-3.2-FINAL-20081019.jar 62kb
Creation date/time . . . . . : 11/07/08 13:20:43
Last access date/time. . . . : 08/16/18 08:11:30
Data change date/time. . . . : 11/07/08 13:20:43
Attribute change date/time . : 12/21/17 13:53:51

poi-scratchpad-3.2-FINAL-20081019.jar 772kb
Creation date/time . . . . . : 11/07/08 13:20:47
Last access date/time. . . . : 08/16/18 08:11:30
Data change date/time. . . . : 11/07/08 13:20:47
Attribute change date/time . : 12/21/17 13:53:51


(A bazillion years ago I experimented with something "poi" that was, I
think, a way to create spreadsheets with RPG? I experimented only, never
used it.)

Thanks for any ideas.