Java for RPG Programmers, 2nd edition still useful?

My new workplace has the 2nd edition (published in 2002), complete with
CD-ROM.

From the book: "...you should get the JDK for Windows from

www.java.sun.com/products (follow the link for Java 2 SDK)." Obviously,
this is obsolete. The link took me to Oracle's website, and I'm not really
sure where to go from here. I'm guessing all of the software on the CD-ROM
is obsolete; it includes:
* Eclipse SDK Release 1.0 for Windows
* IBM Toolbox for Java
* IBM Java Runtime Environment
It looks like the Toolbox is available for download from IBM.
Also, http://www.ibm.com/developerworks/java/jdk/ appears to have the
complete package.

As you can tell, I'm a bit confused as to what I should download and
install. Any advice for a Java noob?