Compilation of Java program can be done in Mainframes ?

sriram.mukundan · New User Joined: 20 Nov 2007 Posts: 28 Location: chennai

Hi Guys,

Can you Please tell me whether we can compile/Run Java application in Host ??

Please Let me know.

Robert Sample · Posted: Tue Jul 01, 2008 10:59 pm

As long as your system programmers have installed the Java VM for your version of z/OS, you can compile and run Java programs. You need to check with your site system programmers.

sriram.mukundan · New User Joined: 20 Nov 2007 Posts: 28 Location: chennai

Thanks!!!

How to Check whether Java VM is there in My system ?

Craq Giegerich · Posted: Tue Jul 01, 2008 11:11 pm

Robert Sample · Posted: Wed Jul 02, 2008 12:14 am

sriram.mukundan · New User Joined: 20 Nov 2007 Posts: 28 Location: chennai

thank u!!!

Robert if u don mind can u tell me in detail. pls.

dick scherrer · Posted: Wed Jul 02, 2008 8:10 am

Hello,

Please add a proper job card and submit the suggested step and then post the output back here.

From what is presented by that run, you should be able to see what you need. If not, possibly we can help.

Robert Sample · Posted: Wed Jul 02, 2008 4:58 pm

As far as I know, Java does not run under z/OS directly -- you cannot have a batch job EXEC PGM=JAVA and expect results. Java on z/OS runs under Unix System Services. BPXBATCH is one of the ways to invoke Unix System Services through JCL. The parm sh java -version indicates to Unix System Services that a shell is being invoked, that the shell is to start up Java, and Java is to return the version information.

The first possible result is something along the lines of

sriram.mukundan · New User Joined: 20 Nov 2007 Posts: 28 Location: chennai

Hi Robert,

Thanks for the information... !!! Really helpful

I just executed the Job which you gave me.

Exec pgm=BPXBATCH
I didnt get the proper output...

I do know that java can't be directly compiled in Host , thruogh SH only i can invoke.

Let me try again and post my results.

Thanks!!!!

Robert Sample · Posted: Wed Jul 02, 2008 8:59 pm

Sriram: make sure you've got lower case characters in the PARM=; Unix is case-sensitive and SH JAVA -VERSION isn't going to work.

sriram.mukundan · New User Joined: 20 Nov 2007 Posts: 28 Location: chennai

Hi Robert,

This is my Job.

//JAVAJB JOB NOTIFY=&SYSUID
//BPXBATCH EXEC PGM=BPXBATCH,
// PARM='sh java -version'
//STDIN DD DUMMY
//STDOUT DD SYSOUT=*
//STDERR DD SYSOUT=*
//STDPARM DD SYSOUT=*

Now my friend also executed the same Job.

Message in his spool :

Maxcc=3840

stderror had this

FSUM1004 Cannot change to directory </nohome>.

I got different error. I will paste it tomorrow.

May i know before running this job do i need to set anything ?

Robert Sample · Posted: Wed Jul 02, 2008 10:13 pm

The FSUM1004 is probably due to a security problem. The RACF OMVS segment has shell program (normally /bin/sh) and the home directory (which is typically but not always /u/userid); it appears your friend's user id does not have a home directory set. I don't know the equivalent items in ACF2 or TOP SECRET since we're using RACF here.

You should not need to set anything to run this job as /etc/profile has the global profile settings and should include the path to the java binary.

sriram.mukundan · New User Joined: 20 Nov 2007 Posts: 28 Location: chennai

Hi Robert,

Robert Sample · Posted: Thu Jul 03, 2008 4:52 pm

From the Unix System Services Message and Codes manual:

sriram.mukundan · New User Joined: 20 Nov 2007 Posts: 28 Location: chennai

Hi Robert,

one of team mate has the Access to OMVS. i tried running the job. it was showing properly as your's.

Robert Sample · Posted: Thu Jul 03, 2008 5:50 pm

I'm not a Java programmer so I don't have a clue about the missing ';' or other missing character. I've got a Hello World java script I use for testing new releases but that's about as far as my Java goes.

As far as the MALLOC cannot be more than some limit: there are a number of memory-related parameters in member BPXPRM?? of your SYS1.PARMLIB and some of these parameters cannot be left at the IBM default if you're using Java. You'll need to contact a systems programmer at your site to verify what the values are and have them changed for Java.

On the plus side, it sounds like your original issue is resolved.

sriram.mukundan · New User Joined: 20 Nov 2007 Posts: 28 Location: chennai

Thanks Robert .!!!

Helping me in the correct moment.

Thanks!!!

shivaganeshaa · New User Joined: 11 Aug 2005 Posts: 14 Location: chennai

Hi,

I have sample java program. Can you tell me whr should be the JAR files be placed. If i keep them in USS directory path, will it be ready to run ?

And how should i bring the JAR files in to USS.