Hmm, seems like not many people are using JPF... Or at least not using JPF and Netbeans.
NASA's site has a page that will instruct you (just make sure you download the latest version).
So that you don't need to click a link, I've included the instructions below:
- Download and install jpf-core, e.g. from the Mercurial repository
- [Optional] Download and install jpf-shell if you want to use the JPF Swing UI
- -------------- take a break ---------------
- Download the gov-nasa-jpf-netbeans-runjpf.nbm file attached to this page.
- From within Netbeans go to Tools->Plugins (Alt+T followed by Alt+g)
- Select the 'Downloaded' tab
- Click on the 'Add Plugins...' button (Alt+A)
- Select the gov-nasa-jpf-netbeans-runjpf.nbm file that was downloaded in step 1
- Select install
- Agree to the License agreement
- Restart Netbeans
I would suggest another break between selecting install and agreeing to the license though. NASA has a tendency to expect people to work too hard.