To run Java on any platform, you need a Java Virtual Machine (JVM). I will not rely too much on PIC16 because of the necessary memory resources and possibly performance. If you need the highest performance and minimum size, then C or C ++ is the best (and most common) solution for embedded systems.
I have compiled a list of JVMs for embedded systems here . You can run Java for any purpose supported by one of the theorists. Some of the links may be outdated, and you may want to search to see if any new tools are available since the list was created.
Many, but not all, need some kind of kernel or RTOS scheduler to run, so you will need to consider this as well as the target processor.
source share