"It is a tutorial intended for the beginning users who are unfamiliar with the JNI."
Just what I need, sometimes it is hard to understand new concepts until the basics are written down and there is code I can try, debug to step through and make small changes to simple existing code that works.
Chapter 2 has the Java app code, HelloWorld.java, the C header code, HelloWorld.h for the connection or link to the Hello-World.dll.