Hi John,
They've managed to make Java version selection, and therefore info,
pretty complicated on the AS/400. You might consider calling a Java program
that gets the system property "java.version" and puts it in a CL readable
location like a data area. That should always be the version Java is
currently using.
See:
http://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html
Alternatively, you might make the choice of which Java class to run
directly in the Java program after determining the version as above. That
would also have the benefit of running on any system. Obviously, system
specific capabilities only run on the specific system. I have written
programs that determine the current OS, like AS/400 or Windows, to determine
how to do things.
HTH,
Joe Sam
Joe Sam Shirah - www.conceptgo.com (904) 302-6870
conceptGO - Consulting/Development/Outsourcing
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-----Original Message-----
From: John Allen
Sent: Wednesday, August 14, 2013 4:29 PM
To: 'Java Programming on and around the IBM i'
Subject: RE: How to retrieve current default Java version programatically
Thanks.
This works on V5R3 (Have not tested on V5R4)
On 6.1 JAVA *VERSION starts qshell and displays the version
on the QSHELL screen (nothing in the joblog)
Did this change in 6.1 (or V5R4) or is there something with
the RUNJVA *VERSION I can specify to make it work
like V5R3 (Use message instead of QSHELL to display the
version)
Thanks
John
-----Original Message-----
From: Dan Kimmel [mailto:dkimmel@xxxxxxxxxxxxxxx]
Sent: Wednesday, August 14, 2013 4:08 PM
To: Java Programming on and around the IBM i
Subject: RE: How to retrieve current default Java version
programatically
Follow RUNJVA *VERSION with RTVMSG.
Additional Message Information
Message ID . . . . . . : JVAB52C Severity . . . . .
. . : 00
Message type . . . . . : Completion
Date sent . . . . . . : 08/14/13 Time sent . . . .
. . : 14:51:39
Message . . . . : Version JVM V5R1M0 JDK 1.4.2.
Cause . . . . . : The Java version is Java Virtual
Machine (JVM) V5R1M0 and
Java Development Kit (JDK) 1.4.2.
Select Message Details to Display
Message ID . . . . . . . . . : JVAB52C
Message file . . . . . . . . : QJVAMSG
Library . . . . . . . . . : QJAVA
Message text . . . . . . . . : Version JVM &1 JDK &2.
Display Field Data
Message ID . . . . . . . . . : JVAB52C
Message file . . . . . . . . : QJVAMSG
Library . . . . . . . . . : QJAVA
Decimal Vary
Field Data Type Length Positions Length
Dump
&1 *CCHAR *VARY 4
*NO
&2 *CCHAR *VARY 4
*NO
-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx [mailto:java400-l-
bounces@xxxxxxxxxxxx] On Behalf Of John Allen
Sent: Wednesday, August 14, 2013 2:49 PM
To: 'Java Programming on and around the IBM i'
Subject: How to retrieve current default Java version
programatically
Is there a way to programmatically (CL or RPG) to retrieve
the current
default version of JAVA that is set.
I need to conditionally execute CL code based on the
current default
version of JAVA (The Java Version that will run if I were
to execute
RUNJAVA)
I know I can retrieve the version(s) of JAVA that are
installed, but I
need the current default version.
The version that is displayed by running JAVA *VERSION
Example
If CurVerJava < "1.5"
Do A
Else
Do B
Enddo
Thanks
John
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