Getting a HeadlessException: No X11 DISPLAY variable was set

Question

Exception in thread \"main\" java.awt.HeadlessException:
    No X11 DISPLAY variable was set, but this program performed an operation which requires it.
        at j         


        

Answer 1

I assume you're trying to tunnel into some unix box.

Make sure X11 forwarding is enabled in your PuTTY settings.