FYI, I was finally able to get OpenCV fully built with Java 8 bindings and installed on a Pi 3 running Jessie.
I'll try to find a way to share an image (my card is 32GB, so a full image would be prohibitive) but in the meantime, here are the "
Installing OpenCV 3.1.0 on Raspberry Pi Debian Jessy with Java Library" instructions I followed from Robin Henniges.
I also compared notes along the way with Adrian Rosebrock's excellent "
Raspberry Pi 3 + Raspbian Jessie + OpenCV 3" instructions.
Following the two together should allow you to build an OpenCV build with Java and Python bindings, but my image will only have Java.
Full credit and thanks to both bloggers for their work and diligent documentation!