For my future reference, one of the things that will show up when you’re debugging your java stuff are functions with signatures.

The official documentation is here: http://docs.oracle.com/javase/6/docs/technotes/guides/jni/spec/types.html#wp16432

But for quicker access, here’s what matters:

For example, the Java method:

long f (int n, String s, int[] arr); 

has the following type signature:

(ILjava/lang/String;[I)J