dumb error

I've been on this for about an hour. I've been doing very basic programming for awhile now, and I'm about to try to step up my game. I am using TextPad and the Windows command prompt (windows 7 x64). I can compile the .class file fine (jar cf Test.jar Test.class) but when I try to run the .jar, i get the error "Could not find the main class: Test.class. Program will exit."

I've been pulling my hair out trying to figure this out... any help would be greatly appreciated. Thank you.