Java ‘jar’ is not recognized as an internal or external command

jarjavawindows

I'm getting the following error when I try to run the 'jar' command in the command line on windows :
'jar' is not recognized as an internal or external command

The general solution seems to be that I need to add the jdk bin folder to the PATH in environment variables. I have already done this, I added the following to the path variable :
…; C:\Program Files\Java\jdk1.8.0_40\bin\;

Though I'm not sure if having the jdk reside in 'program files' instead of 'program files x86' affects this. I'm on 64 bit windows with 64 bit java.
Thanks