J2EE Developer's Handbook provides both -- discussing the tools in the context of practical J2EE applications which demonstrate every aspect of J2EE development. In the Spring of 2003, Sun will relase J2EE 1.4 which includes numerous updates and new features such as JSP 2.0, EJB 2.1, and new APIs for creating J2EE Web Services and using the J2EE Connector Architecture.