For seasoned Java programmers who want to stay up to date on the latest Java tools, this guide discusses the new features of Java 6 Mustang. This handbook to the new version includes updated information on Web services, a JavaScript engine that allows access to information in a Java program, JDBC 4.0, JAXB 2.0, XML digital signature APIs, more sophisticated Swing components, and improvements in Java 2D that includes a GIF image writer.