I have been asked by someone to implement communication between a Java application and a Pascal application. I have very little knowledge of Pascal. Is it possible? If so, can someone provide some guidance? Currently I am clueless at this point.
Sure this is possible.
In case if you simply need to use a set of functions implemented on Pascal you can use JNI with the same way as C. I.e. create a DLL for Windows or shared library for UNIX using Pascal with the JNI specific function names. You can use pas2jni instead of javac -h (or javah) or make your work simpler with JNA library
If you interested with multi-process integration, i.e. you have one app written on Java and another app written on Pascal you can use SOAP or REST API.
To implementing SOAP on Pascal you can use Web Service Toolkit
To implement REST on Pascal you can use
mORMot toolkit.