Unable to Integrate the Java jar utility with PostMan Tool

Iā€™m looking for the support to integrate the Java Jar(Excel Data to JSON Builder utility Integration) with Postman, but not able to do so, I tried multiple option to call the Jar from JAVASCRIPT within the postman but no luck.

Same thing I have achieved in ReadyAPI but not through Postman.

Please share your thoughts and solution to achieve this Integration.