I can run .jar files through cmd, but I cannot double click them [closed]

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I had the same problem, and it turns out that the .jar file association in the registry was broken. The following steps fixed it:

  • Open the Registry Editor, and navigate to HKEY_CLASSES_ROOT\jarfile\shell\open\command, and modify the value of the Default key as follows
  • Replace [Location of your JRE] in "[Location of your JRE]\bin\javaw.exe" -jar "%1" %* with the root directory of your JRE
    installation. For example, "C:\Program Files\Java\jre7\bin\javaw.exe" -jar "%1" %*.
  • Repeat the above steps for HKEY_LOCAL_MACHINE\SOFTWARE\Classes\jarfile\shell\open\command.

I have a Windows 7 machine, but I assume this would work for 32-bit environments as well.

EDIT: Fixed the path in the example – it should use the “Program Files” directory and not “Program Files (x86)”.

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