How Can I Double-Click to Run JAR Files on Windows?

How to Run JAR Files with Double-Click on Windows

Running JAR files on Windows through the command line is straightforward using the java -jar command. However, for greater convenience, it's often desirable to associate JAR files with a double-click action.

Upgrading or Reinstalling the Java Runtime Environment (JRE)

The easiest way to enable double-clicking for JAR files is to upgrade or reinstall the Java Runtime Environment (JRE). By default, the JRE installs an association for JAR files.

Customizing JAR File Association

If upgrading the JRE doesn't work or isn't an option, you can manually set up the JAR file association:

1. Open Windows Explorer.
2. Click 'Tools' > 'Folder Options'.
3. Select the 'File Types' tab.
4. Scroll down and select 'JAR File'.
5. Press the 'Advanced' button.

6. In the 'Edit File Type' dialog box:

   • Under 'Actions', select 'open'.
   • Click 'Edit...'.
   • Press 'Browse' and locate the Java interpreter javaw.exe.

   • In the 'Application used to perform action' field, enter:

     "C:\Program Files\Java\j2re1.4.2_04\bin\javaw.exe" -jar "%1" %

     (Note: Adjust the path to match the installed Java version.)

7. Click 'OK' to close all dialogs.

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