AES S-box question

I am implementing Rijndael Advanced Encryption Standard (AES). In the specification document the S-box used in the transformation routine is presented. Does this mean that the S-box does not need to be kept secret? Or should I generate my own S-box and inverse S-box arrays? If so can any one point me to where I can find an algorithm to generate the S-box.
Regards,
Alex

Not a Java question. You might try posting to sci.crypt on Usenet: http://groups.google.com/group/sci.crypt/search?q=AES+S-boxes&

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