Sun's Java Tutorial
Practical guide for programmers with hundreds of complete, working examples.

OOP Concepts (JDK Tutorial)
Basics of Object-Oriented Programming.

Applet Security Restrictions
What applets can't do.

Applet Resources and Freebies
Java Sun Applets Page.

Oxford University Sound Archive
for AU sound files and more.

Java Lecture Notes
from E.R.Harold of Brooklyn Poly.