I haven't made any progress with this:
C:\Users\Nick>ftype | find "jarfile"
jarfile="C:\Program Files\Java\jdk1.8.0_65\bin\javaw.exe" -jar "%1" %*
C:\Users\Nick>java -version
'java' is not recognized as an internal or external command,
operable program or batch file
C:\Program Files\Java\jdk1.8.0_65\bin>java -version
java version "1.8.0_65"
ava SE Runtime Environment (build 1.8.0_65-b17)
ava HotSpot 64-Bit Server VM (build 25.65-b01, mixed mode)
When I try start the jar file it looks like a cmd prompt window flashes and then nothing hapens