Sun's Javasoft site
JDK 1.2 API at Sun
JDK 1.3 API at Sun
J2EE API at Sun
Java Developer's Connection
A site dedicated to the politics and recent events in the Java world - with no influence from Sun.
I checked this site out and looked up EJB's - whoa! What a collection of info! This place is like a living almanac.
Cafe au Lait
Includes a Java FAQ and the biggest list of Java mailing lists
Peter van der Linden's site
The author of "Just Java" and several other books. Always something weird at this site.
An independent web site focused on enterprise Java development. Provides development tools, resources, and
articles covering EJB, JSP, P2P, Java design, XML, wireless/consumer Java, multimedia Java development.
Focus on Java Technology
Features original articles, free Java source code, Java programming
contests, chat, forums, tutorials, free mock exams for SCJP, SCJD, and SCWCD
certifications, and tons of categorized links.
CoreJ2ME - The Source for J2ME Developers
Complete coverage of Java 2 Micro Edition (J2ME) and Mobile Information Device Profile (MIDP). Includes articles,
source code, discussion groups, training resources, links to related sites and downloads of the latest software.
Denver Java Users Group
The best conference for Java engineers. No sales pitches. Big turnout from IBM.