Java

Cadenhead, Rogers and Taber, Mark. Java 2 in 24 hours. SAMS.net 1999.

Eckel, Bruce. Thinking in Java, 2nd Edition. Prentice Hall, 2000.

The best book to give an experienced non-Java developer an overview of Java. The entire book is on the web at Bruce Eckel's site.

Englander, Robert. Developing Java Beans. Sunsoft Press Java Series, 1997.

Heinle, Nick. Designing With Javascript : Creating Dynamic Web Pages. O'Reilly & Associates, 1997.

• Written by a 16 year old, this book gets rave reviews for giving you the real bits painlessly.

Horstmann, Cay S. and Cornell, Gary. Core Java 1.2 : Fundamentals. (Sunsoft Press Java Series), 1999.

Data Structures and Algorithms

Goodrich, Michael T. and Tamassia, Roberto. Data Structures and Algorithms in Java. John Wiley & Sons, 1998.

• Data structures and algorithms: A comparative slice and dice -- er, review -- of 5 Java DS&A books. If you need to increase the performance of your Java application or applet by orders of magnitude (and don't we all?), JavaWorld book reviewer Laurence Vanhelsuwé suggests you familiarize yourself with the available data structures and algorithms literature.
• Scored 8.5 out of 10 in review.

Weiss, Mark Allen. Algorithms, Data Structures, and Problem Solving With C++. Addison-Wesley, 1996

• Scored 8 out of 10. Second best in Laurence's review.