How to run .jar file by double click on Windows 7 64-bit? Running a .jar file in a command line works fine, but i am not able to run any .jar file by double clicking on my Windows 7 (64). It seems nothing happens after the double click. I tried the ftype hint, no success: ftype jarfile="C:\Program Files\Java\jre7\bin\javaw.exe" -jar "%1" %* I reinstalled the JDK 7 64-bit, no success. Any idea? W..