help!!!

[Willy]

Sir/Madam,
        Good day!!!
        I download the jdk_1.1.6-v5-x86-lib5.tar.gz... then untar it... it
extracted on jdk116 directory then... and when i run javac it return the
error message "CLASSPATH NOT SET".... please help me how to solve this
problem... We're students now developing a software using Java in
Linux... please help us as soon as possible....
        Thank you very much!!!!!