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There are some downsides to the classpath argument. Once you run any java
program in your job, the classpath is fixed at its current value. For
example, if your job calls some java program, other than POI, and then you
try to run your POI using program with the additional classpath
requirements, it will fail. What this all really means is that if you're
going to run java in a persistent job, like an interactive session, then
the ProdData/java directory has some advantages because its in the default
classpath.

To avoid all of this confusion, its best to try and run the java using
program in a batch job where the JVM is started and ended in predictable
ways.




From: Dan Kimmel <dkimmel@xxxxxxxxxxxxxxx>
To: Java Programming on and around the IBM i
<java400-l@xxxxxxxxxxxx>,
Date: 05/29/2013 05:24 PM
Subject: RE: .jar/.tar file question #2
Sent by: java400-l-bounces@xxxxxxxxxxxx



You really don't want those in Java400/ext. That's where java extensions
go. Java extensions are not subject to the same kind of security checks as
normal jars and it is really hard to override jars in that path. For the
most part, only security extensions to java should go in the ext path.

Create a directory in the IFS and put all your POI jars in there. When you
start your RPG program, make sure the classpath includes a full path to
*EACH* jar.

FWIW, depending on what operating system you're using, java will reside in
either /QIBM/ProdData/Java400 or /QOpenSys/QIBM/ProdData/Java. All the J9
JVM's live only in QOpenSys.

-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx [mailto:java400-l-bounces@xxxxxxxxxxxx
] On Behalf Of Gary Thompson
Sent: Wednesday, May 29, 2013 3:32 PM
To: Java Programming on and around the IBM i
Subject: .jar/.tar file question #2

I think I now have the .jar files I need (thanks Gary and Darren) and I
think these need to be copied to: /QIBM/UserData/Java400/ext

But only have /QIBM/UserData/ but no Java400/ext

Do I just create these directories/folders ?
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