Has your .jar associations ever been hijacked ?
Mine too, after spending far too long following suggestions of people on forums of how to get it back, using your command prompt ‘assoc’ & ‘ftype’ commands and manually editing your regedit etc…
Forget it, grab yourself this handy util ‘jarfix‘
Jarfix has existed since 2002, so can be trusted to correct the .jar association & put back the following -jar flag, so when you launch a .jar file it runs correctly. On typing ‘ftype jarfile’ in your Command Prompt you should see the following.
jarfile=”C:\Program Files (x86)\Java\jre6\bin\javaw.exe” -jar “%1” %*