Sun's released a minor maintenance update to the Java Development Kit 1.4.2, version 1.4.2_04. The release notes have not been updated yet, but I assume some bugs have been fixed. It's available for Winodws, Linux, and Solaris.
Eric Lafortune has released ProGuard 2.1, a free Java class file shrinker and obfuscator that can detect and remove unused classes, fields, methods, and attributes and rename the remaining classes, fields, and methods using short, meaningless names. The resulting jars are more compact and more difficult to reverse-engineer. Version 2.1 now supports Java 1.5. ProGuard is published under the GPL.
The Jakarta Apache Project has released
Tomcat 3.3.2, an open source servlet container for the Apache web server
and the official reference implementation of
the Java Servlet API and Java Server Pages (JSP).
Tomcat 3 implements version 2.2 of the Java Servlet API
and version 1.1 of Java Server Pages. 3.3.2 is a bug fix release.