Tekkit Server for Windows 8

[NoopDawg77]

Hey guys,

I wanted to set up a Tekkit server for some friends and me but whenever I open the batch file this shows: "C:\Users\Me\Desktop\Server>java -Xmx3g -Xms2g - jar Tekkit.jar nogui

'java' is not recognised as an internal or external command,operable program or batch file."

Then it says press any key. After that, it just closes. My computer is a Lenovo Z580 with Windows 8. Thanks