I have two RPI's, a model B+ and a Pi 3 model B. They are both running Rasbian.
I have made sure they have the same Java JDK on both (1.8.0_131) but one will execute a jar file, whereas the other cannot find or load main class Index.
Any help please? I'm fairly new to all this, but have avoided asking the question for many weeks now while trying to solve this myself.
Thanks Seb