Where can I find information on all of the method calls in jni.h and jni_md.h? Is there a "javadoc" document or a similar document that describes all of the methods in these header files?

Alexander Krapf

You can check out the JNI tutorial on Sun's website or you can buy one of the the following books (I recommend both if you're serious about getting into JNI):

Essential JNI by Robert Gordon or
The Java Native Interface by the architect of JNI, Sheng Liang