Rather than a simple update of the existing Professional Java Server Programming book, the J2EE edition represents an evolution of the content to reflect the changing state of server-side Java development. Whereas the first edition can be seen as an introduction to Java on the server, the new edition is a more tightly integrated vision of how to combine the Java technologies to develop n-tier applications in Java based primarily around J2EE. Since the release of the first edition in the fall of "99, probably the single most significant change in the Java server-side landscape has been the release of the Java 2 Platform, Enterprise Edition (J2EE). Although we covered many of the elements of J2EE in the first edition of the book, many things have changed. J2EE represents a serious attempt by Sun to make Java not just a viable language, but more importantly a viable platform for enterprise development. This book is about how to use Java for enterprise development, using the J2EE runtime architecture. Wide range of technologies including: J2EE, RMI, JDBC, JNDI, LDAP, XML, XSLT, Servlets, JSP, EJB, JMS, JavaMail, CORBA, Performance, Scalability, Unit Testing, and Debugging Benefits and limits of the typical real-world vendor implementations of the J2EE specification The resulting practical aspects of real-word design using the J2EE technologies