CL Program that Calls QSHELL to Run a Java Class

Troubleshooting

Problem

This document provides an example of a CL program that calls QSHELL and then runs a Java™ Class.

Resolving The Problem

Caution: As is only. IBM accepts no responsibility for its correctness.

This sample is intended to demonstrate a couple of points.

1) How to direct the stdout messages to an output file
2) How to construct the classpath and invoke qshell to call the Java™ class.
3) Sometimes it is necessary to pass arguments to a Java™ class.

This sample illustrates how to pass 2 arguments.

For completeness here is the Java™ class.
This class simply echos back the arguments passed into the class.

public class HP {

    public static void main(String args[]) {

 for (int i = 0; i < args.length; i++)

    System.out.println("Hello " + args[i]);

    }

}

The following is an example of a CL program that calls QSHELL and then runs a Java™ Class.

PGM

DCL VAR(&MYCLASS) TYPE(*CHAR) LEN(30) VALUE('HP')

DCL VAR(&JAVA) TYPE(*CHAR) LEN(512)

DCL VAR(&PARM) TYPE(*CHAR) LEN(512)

DCL VAR(&CLASSPATH) TYPE(*CHAR) LEN(512) VALUE('-cp +

/home/tosh/toshifs520/')

DCL VAR(&MYPARM1) TYPE(*CHAR) LEN(10) +

VALUE('Winner')

DCL VAR(&MYPARM2) TYPE(*CHAR) LEN(20) VALUE('Hotdog')

DLTF FILE(XZY2435/JAVATST)

MONMSG MSGID(CPF2105)

CRTPF FILE(XZY2435/JAVATST) RCDLEN(132) +

TEXT('JAVA RUN') MAXMBRS(*NOMAX)

OVRDBF FILE(STDOUT) TOFILE(XZY2435/JAVATST)



CHGVAR VAR(&PARM) VALUE(&PARM *bcat &MYPARM1)

CHGVAR VAR(&PARM) VALUE(&PARM *bcat &MYPARM2)

CHGVAR VAR(&JAVA) VALUE('java ' *BCAT &CLASSPATH *BCAT +

&MYCLASS *BCAT &PARM)

QSH CMD(&JAVA)

ENDPGM

The Java™ stdout messages are placed in the output file:

DSPPFM XZY2435/JAVATST

Hello Winner

Hello Hotdog

[{"Type":"MASTER","Line of Business":{"code":"LOB68","label":"Power HW"},"Business Unit":{"code":"BU070","label":"IBM Infrastructure"},"Product":{"code":"SWG60","label":"IBM i"},"ARM Category":[{"code":"a8m3p0000006x8GAAQ","label":"CL"}],"ARM Case Number":"","Platform":[{"code":"PF012","label":"IBM i"}],"Version":"All Versions"}]

Historical Number

N1015682
368880934

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Document Information

More support for:
IBM i

Component:
CL

Software version:
All Versions

Operating system(s):
IBM i

Document number:
638515

Modified date:
06 December 2024

UID

nas8N1015682

IBM Support

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