Where is Base64Coder class?

I have a java class with the following imports:

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

I'd like to use this code:

return Base64Coder.encodeString(new String(cipherText));

But get this error:

Description      Resource      Path      Location      Type
Base64Coder cannot be resolved      TripleDES.java      /Encryption/src      line 31      Java Problem

I'm using Java SE 1.6.  Any suggestions?
Who is Participating?
VenabiliConnect With a Mentor Commented:
Not quite sure which one is used...
http://www.source-code.biz/base64coder/java/ for example?
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