lab or exercise with cobol-java-calling

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Description

The moment you update to COBOL 6.4 please add an exercise or lab how to call java from cobol (in batch without OO-COBOL) and vice versa.
It will be helpful for COBOL-starters to see that this is possible and how to do it.
experienced COBOL-devolopers will get value from this, too. It is much harder than shown in many presentations to this.
But it is very usefull, cause COBOL has features java will not get that quick and java has features cobol will definitely not get. To get to know how to connect the worlds will give COBOL-developers abbilities they couldn't imagine.

Currently using java is done with writing info from cobol to file. In a second step (new job or jobstep) java reads that file to work with that information. There are many reasons why java doesn't access the same data-files like COBOL did before. The most common is, that in COBOL is the business-logic is and no one will rewrite that to java 1:1.

With COBOL 6.4 there will be more flexibility - but people need to get to know it.

Problems

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Additional Context

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The issue names no repository file, test, or entry point. Start by reviewing the existing lab and exercise organization, then determine where a COBOL 6.4 example belongs. Done means the course includes a lab showing batch COBOL-to-Java and Java-to-COBOL calls without OO-COBOL.