Here You Will Find Links To Free Stuff   

• The Java Developers Guide has many good code examples for every package: http://www.javaalmanac.com/egs/

• You can read the Java Tutorial available at: http://java.sun.com/docs/books/tutorial/index.html

• And you can get hold of Bruce Eckel's Thinking in Java here: http://www.mindview.net/Books/TIJ/

• On JavaRanch we have our Camp Fire Stories where you can learn some Java concepts in a lighter vein: http://www.javaranch.com/campfire.jsp

• And the JavaRanch Journal contain articles covering all aspects of Java from elementary to advanced: http://www.javaranch.com/journal/

• You can learn all about Swing from the book Swing, including the full text of the first edition

• A number of books are available for free from TheServerSide: Mastering EJB 3.0, Jakarta Struts Live, The J2EE Architect's Handbook, Servlets and JSP: The J2EE Technology Web Tier, Java Testing and Design, EJB Design Patterns

• Bruce Perens Open Source Series of books makes the full text of tech books available 6 months after publication, e.g. "Apache Jakarta Commons: Reusable Java Components" and "Java Application Development on Linux"

• Textbook classics by Niklaus Wirth: Algorithms and Data Structures and Compiler Construction

• The 2nd edition of Volume 1 of Core Servlets and JSP is available as PDF for free.

• A collection of examples from Java Examples - Learn Java Programming by Examples