This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
If you're at the point where you're just trying to get javac to run, then it's best to not set CLASSPATH to anything at all! It is not necessary to set it. Java will work fine with the default setting -- but setting CLASSPATH incorrectly will prevent it from doing anything.