Wiley Java 2 Enterprise Edition 1.4 (J2EE 1.4) Bible 978-0-7645-3966-4 Benutzerhandbuch

ava 2 Enterprise Edition, or J2EE, is a package of specifi-
cations aligned to enable the development of multi-tier

enterprise applications. The specifications outline the various
components needed within a J2EE enterprise system, the
technologies for accessing and providing services, and even
the roles played during the development, deployment, and
runtime lifecycle. The combination of these specifications
introduced faster and more streamlined development pro-
cesses, to the software industry, that have been mapped onto
common software methodologies such as RUP, XP, and others.

J2EE has fast become the de facto standard for developing and
deploying enterprise systems. It represents Sun’s attempt to
take their Java mantra of “Write Once, Run Anywhere” to the
next level and make it “Write Once, Deploy Anywhere.” While
using it is not as easy as dropping new code fragments into
existing code, J2EE has made significant strides in easing the
burden on the developers and deployers of a system.

This chapter will introduce J2EE. At the time of this writing
J2EE 1.4 is in beta but it should be in public release by the
time this book is published. 

In 1995, Sun released Java, a fully object-oriented program-
ming language. While most of the concepts within Java were
not new, it did meld many features, such as memory manage-
ment and garbage collection from Smalltalk and the syntax of
C/C++, into a new easy-to-learn programming language. 

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Reviewing a brief
history of Java

Understanding J2SE

Examining the 
origin of J2EE

Working with 
the Model-View-
Controller (MVC)

Understanding 
the J2EE APIs

Discovering what’s
new in J2EE 1.4

Looking toward 
the future of J2EE

Understanding the
Java Community
Process

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