the above procedure and pictures are related to newest RASPBIAN Buster ( on a RPI 3B+ )
but this also worked on the older RASPBIAN stretch
did you click on [ EMBED JAVA for Linux 32bit ] ?
NO,
so with this i can not help you.
but somewhere is documentation how to use external installed JAVA from processing.
any reason why you just have to do that differently?
for VNC please use
options / troubleshooting / enable direct capture mode
still for most of the work i have that switched OFF