The Java Tutorial is a practical guide for programmers with hundreds of complete, working examples and dozens of trails (groups of lessons on a particular subject). Tutorials and Online Training site lists available courses.
Information about the data Oracle collects during the installation and auto-update of the Java Runtime Environment (HTML, PDF)
New to Java Center is a collection of links to articles, tutorials, online books, and software downloads helps you find what you need to start writing applications.
The Java SE Learning Path provides both programmers and non-programmers with the essential training to become proficient in the basics of Java technology programming using the Java Platform, Standard Edition (Java SE).
Tutorials are available for various levels, starting with the comprehensive Java Tutorial.
The Glossary is a listing of terms related to the Java platform and technology.