Java Source Code for Tetris Game  
   Provides source code as JBuilder 5 project. [Commercial]
   http://rain.prohosting.com/kakasoft/java.htm

CGI with Java  
   Using Java for CGI programs. Includes on-line examples and source code for a CGI form-parser and cookie parser in Java.
   http://www.apl.jhu.edu/~hall/java/CGI-with-Java.html

Java Tips  
   Contains many examples and useful tips.
   http://www.javaworld.com/columns/jw-tips-index.shtml

Real's Java and Javascript How-to  
   A collection of code snippets ready to be "cut&paste" in your own sources.
   http://www.rgagnon.com/howto.html

Java Reference and Examples  
   Examples include casting, ArrayLists, ListIterators, and 'HelloWorlds' for applications, applets, servlets, and JSPs.
   http://www.fluffycat.com/java/

Java Impact and Gravity Simulator  
   The IBM Corporation contributes this program to the public to demonstrate the Java language and to help people learn to program in Java by browsing and modifying the source code.
   http://www.geocities.com/Paris/6502/impact.html

Hello World program  
   A short example demonstrating an implementation of the proverbial "Hello World" app.
   http://www2.latech.edu/~acm/helloworld/java.html

Efficient text searching in Java: Finding the right string in any language  
   Detailed, clearly-written tutorial from IBM on internationalized searching algorithms. Includes code snippets and an i18n Boyer-Moore algorithm which requires JDK1.2.
   http://www-106.ibm.com/developerworks/java/library/j-text-searching.html

Share Java Knowledge  
   Collection source code examples written in Java.
   http://www.ideas2work.com/share-knowledge.php

Web Application Tier  
   Learn by examples using JBoss and EJB.
   http://www.webapptier.com/