Core Java Media Framework
   by Linden deCarmo. Book home page with table of contents, reviews, sources, fixes.
   http://www.mindspring.com/~lindend/corejmf/

Core Web Programming 2nd Edition
   by Marty Hall and Larry Brown. Book home page with sample content and complete archive of Java source code.
   http://www.corewebprogramming.com/

Data Structures and Algorithms with Object-Oriented Design Patterns in Java
   Book by Bruno R. Preiss. Online version, source code, demos, errata.
   http://www.brpreiss.com/books/opus5/

FreeTechBooks: Java Programming Language
   Annotated list of free online programming books. Topics range from beginner to advanced. Descriptions, publishing information, links.
   http://www.freetechbooks.com/viewforum.php?f=4

J2EE and JAX: Developing Web Applications and Web Services
   Includes updates and supplemental material, and links to related information.
   http://www.theyawns.com/j2eejax.htm

Java Book Reviews, from the "Java Coffee Break"
   A selection of highly recommended titles for Java programmers of all experience levels.
   http://www.javacoffeebreak.com/books/

Java Collections
   By John Zukowski (Apress).
   http://www.apress.com/book/bookDisplay.html?bID=36

JavaWorld Java book reviews
   A collection of all of the book reviews by the editors and writers of JavaWorld
   http://www.javaworld.com/news-reviews/jw-nr-book-reviews.html

O'Reilly - Java In A Nutshell
   Third edition of the reference book, completely available online.
   http://www.unix.org.ua/orelly/java-ent/jnut/

Recommended Java and Web-Programming Books
   A large number of personal recommendations for the best Java and WWW programming books, sorted by category, from an experienced developer and instructor.
   http://www.apl.jhu.edu/~hall/java/Java-Books.html

TechBookReport - Java
   Independent book reviews of Java and Java-related titles. Also includes reviews of Java related software and utilities.
   http://www.techbookreport.com/JavaIndex.html

TechBooksForFree - Java
   A collection of Java programming books available on the Web free of charge.
   http://www.techbooksforfree.com/java.shtml

The Java Series
   Published on Sun's behalf by Addison-Wesley Longman, this is the authorized series of books on the Java Platform and APIs.
   http://www.sun.com/books/java_series.html