"Swing" is based on JDK1.2 so the changes/additions in 1.3 are not covered. However, there aren't too many changes in JDK1.3. One is the addition of an InputVerifier class which is handy when validatidating input of text fields. There was also a change to JInternalFrame requiring a setVisible(true) call to make it visible within a container.. this previously wasn't required.
There are some other changes but not too significant. The only book that is completely up to date with JDK1.3 is John Zukowski's book "John Zukowski's Definitive Guide to Swing for
Java 2 2nd edition"
Thanks,
-Matt
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Matthew Robinson co-author of "
Swing" (1999, Manning Publications). Freely available at
http://www.spindoczine.com/sbe