Why Can't I Double-Click to Run .jar Files on Windows 7 64-bit?

How to Double-Click to Run .jar Files on Windows 7 64-bit

Despite successfully executing .jar files through the command line, users may encounter difficulties running them by double-clicking in Windows 7 (64-bit). Double-clicking often yields no response.

Troubleshooting:

The ftype command has been attempted without success:

ftype jarfile="C:\Program Files\Java\jre7\bin\javaw.exe" -jar "%1" %*

Reinstalling JDK 7 64-bit has also proven ineffective.

Solution:

If the .jar files were previously opened using the right-click option and navigating to pathtoyourjavaw.exe, the following registry key must be removed:

[-HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.jar]

After removing the registry key, execute the following commands:

C:\>assoc .jar=jarfile
C:\>ftype jarfile="C:\path\to\your\javaw.exe" -jar "%1" %*

This should restore the ability to run .jar files by double-clicking on them.

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