Oh, you mean this sentence?
"If you don't already have a 1.5
or greater Java 2 Standard Edition SDK ... Get the latest non-beta version posted."
That means that they recommend you get the highest version you can get without getting a beta version (which would be Java 7 at this point in time).
Try
this page for the latest stable version.
[ December 09, 2007: Message edited by: Marilyn de Queiroz ]