Installing java development kit

I have a fair amount of experience with java on machines at the university I attend, but am a little baffled as to how to install or what to install on my windows machine at home. I have installed both J2EE and the latest JDK successfully, but when I try to run the compiler javac in a command line, I am told that the command doesn't exist.
The J2EE documentation doesn't say anything about this and I can't find where the JDK 5.o is installed. Can someone steer me in the right direction? Sun's development environment packaging is very confusing.
Thanks,
Mike

The Installation Instructions for the Java 5 JDK explain what the SDK installs, where it installs it, and how to set Windows' PATH to include the various Java tools. A link to this document is immediately below the link you clicked to download the JDK. You should read it.
None of this has anything to do with the J2EE product.

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