Java Unrecognized Upon Launch

[ChickenStrip]

C:\Users\Kyle\Desktop\Tekkit_Server_3.1.2>java -Xmx3G -Xms2G -jar Tekkit.jar nog

ui

'java' is not recognized as an internal or external command,

operable program or batch file.

C:\Users\Kyle\Desktop\Tekkit_Server_3.1.2>pause

Press any key to continue . . .

I can't seem to be able to successfully launch my server. I have tried to re-download Java, and have done so. I then copied that once it was in my [Program Files (x86)] directory to my [Program Files] since I figured it was looking for it in there maybe. However, this has had no effect. At the moment, I can't seem to think of any other reasons.