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.