This is all that comes up.
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C:\Users\reid\Desktop\tekkit server>java -Xmx3G -Xms2G -jar Tekkit.jar nogui
'java' is not recognized as an internal or external command,
operable program or batch file.
C:\Users\reid\Desktop\tekkit server>pause
Press any key to continue . . .
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That's all, I'm not very good with computers so could someone please help?