Tekkit Classic Server Error

[Zediious]

When I launch the 3.1.2 version of the Tekkit Classic server, the Command Prompt gives this error

C:\Users\jrune_000\Desktop\The Heartdrive\Minecraft\Servers\Tekkit Classic>java

-Xmx3G -Xms2G -jar Tekkit.jar nogui

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

operable program or batch file.

 

C:\Users\jrune_000\Desktop\The Heartdrive\Minecraft\Servers\Tekkit Classic>pause

 

Press any key to continue . . .

I'm not sure what to do. Please reply quickly.

Edited August 10, 2020 by Zediious