On my new Windows 7 desktop, I tried to open a .jar file, only to be rebuked. And lo, after some Googling, there is. Here’s how:
- Go to the run box and type in cmd. Instead of hitting Enter, use Ctrl + Shift + Enter.This will run the command prompt with Admin rights.
- A dialog box should pop up notifying you of what you’re doing and you have to confirm it. Annoying.
- Type this in to the command line: assoc .jar=CompressedFolder. Press Enter
There you have it kids. Windows 7 opens .jar files like they were .zip files.