RE: Need help with RNX0301 error -- CLASSPATH or signature error -- JAVA400-L

PS everyone.

The META-INFO folder contains the file MANIFEST.MF.

MANiFEST.MF has one line, "Manifest-Version: 1.0"

The URL of the example I am trying to implement is "https://www.mysamplecode.com/2011/06/call-java-from-rpgle-explanation-with.html";

I haven't posted the code because it seems long. If anyone wants to take a look at it I can email to you as attachments or post it into the mailing list.

Thank you all.

-----Original Message-----
From: JAVA400-L <java400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Blalock, Bill via JAVA400-L
Sent: Sunday, October 6, 2024 1:12 PM
To: Java Programming on and around the IBM i <java400-l@xxxxxxxxxxxxxxxxxx>
Cc: Blalock, Bill <Bill.Blalock@xxxxxxxxxxxxx>
Subject: RE: Need help with RNX0301 error -- CLASSPATH or signature error

Hi David,

The fully qualified name of the classes I am trying to use are
rpgExample.Item
rpgExample.GetItem

I exported these two classes in the package rpgExample to a jar file named rpgExample. To confusing? The jar file contains the two classes Item and GetItem.

I tried exporting again into a clean environment. This jar is rpgExampleJar.jar. The package in the jar is rpgExamplePkg. The structure of the jar file, obtained by copying it as a zip file, is

META-INFO
MANIFEST.MF
rpgExamplePkg
Item.class
GetItem.class

How should I set up the CLASSPATH?

Thank you for helping.

-----Original Message-----
From: JAVA400-L <java400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of David Gibbs via JAVA400-L
Sent: Sunday, October 6, 2024 12:31 PM
To: Java Programming on and around the IBM i <java400-l@xxxxxxxxxxxxxxxxxx>
Cc: David Gibbs <david@xxxxxxxxxxxx>
Subject: Re: Need help with RNX0301 error -- CLASSPATH or signature error

What’s the fully qualified name of the class you’re trying to use?

Fully qualified class includes package & class name.

It looks like your trying to use the jar name in the class name.

David

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On Sun, Oct 6, 2024 at 11:25 AM Blalock, Bill via JAVA400-L < java400-l@xxxxxxxxxxxxxxxxxx> wrote:

I am trying to call Jave from RPGLESRC. I keep running into RNX0301
when executing the RPGLE program. I have been at it 3 days and sure
could use some guidance.

Message . . . . : Java exception received when calling Java method.
Cause . . . . . : RPG procedure PRCPWDIRG in program BLALOCK/PRCPWDIRG
received Java exception
"java.lang.NoClassDefFoundError:rpgExample.Item" when calling
method "<init>" with signature "()V" in class "Item".

I tried for two days to get past this error with my own class and RPG.
Yesterday I decided to see if I could make RPGLE and Java work
together with an example from the Internet.
https://www/.
mysamplecode.com%2F2011%2F06%2Fcall-java-from-rpgle-explanation-with.h
tml&data=05%7C02%7Cbill.blalock%40fisglobal.com%7C1ab34eb773e942c6b917
08dce62ca4f6%7Ce3ff91d834c84b15a0b418910a6ac575%7C0%7C0%7C638638326638
161185%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJ
BTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=RhVyxWqlc9RIuMdwMnnEQYv
D5nYdge7P5rYz7jhbKSw%3D&reserved=0
This is a well thought out example.

I wanted to eliminate coding errors in my RPGLE and Java, to minimize
the possibility that this is a signature error. Still getting the same error.

I created an Eclipse project, rpgExample. I copied the Java source
from the example into two files, Item.java and GetItem.java. In
Eclipse I exported them to the IFS as a jar file, named
rpgExample.jar. The destination was /iasp1/java/prcExample. So now I
have the jar in /iasp1/java/prcExample/rpgExample.jar.

I create the RPGLE program as BLALOCK/QRPGLESRC (PRCPWDIRG). I
changed the package name from "com.as400samplecode" to match my
package name of "rpgExample" in both Java and RPGLE.

I used this statement at the top of the RPGLE program:
cmdString = 'ADDENVVAR ENVVAR(CLASSPATH) ' +
'VALUE(''/iasp1/java/prcExample/rpgExample.jar'')' +
'REPLACE(*YES)';
runCmd(cmdString);

I checked the value of CLASSPATH after executing the program with
WRKENVVAR. The value was
CLASSPATH
'/java/prcExample/rpgExample.jar'
That is what I expected. I checked the CLASSPATH with WRKLNK. It was
found.

The execution fails with the RNX0301 error.

I cannot understand what is going on. I'd appreciate some advice. I
can send the source code to you.

Thanks

Bill Blalock
Complete Payment Recovery Services
C (205) 292-0725
E Bill.Blalock@xxxxxxxxxxxxx<mailto:Bill.Blalock@xxxxxxxxxxxxx>

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