Java is everywhere: on all platforms and devices and in all countries around the world. It enables developers to make programs work just about anywhere. The brilliance of Java is the platform independence. It is the language of choice for developing applications for the BlackBerry Smartphone. So its now in Android too. So u have jobs in all fields
Desktop(J2SE).
WEB(J2EE).
Smart Phones(Android).
To develop advanced components and tools one always need to use the base library. J2SE provides basic libraries like language features, utilities and networking APIs. Even J2EE and other Java technologies are extended or developed over the top of such base libraries. With the changing times, J2SE or Core Java is not going to lose its importance.
People are always in search of implementing J2EE, a way that it can be used optimally. Several new frameworks, practices and design patterns are develop to make proper utilization of advantages of J2EE. Some of them are discussed here.
- Design Patterns :For
enterprise applications it is very important that they are well
designed prior to start of their development phase because they are
large in scale. And to design a J2EE application there is always need
for years of experience and expertise over technology. Some of the
design patterns are MVC (Model-View-Controller), DAO (Data Access
Objects), Session Façade, Front Controller, Composite View and many
more.
. - Frameworks :Some
organizations have developed their own frameworks over the top of J2EE.
Purpose after developing such frameworks is to provide functionalities
that are common for all applications so that applications can be
developed within a short period of time. Also such frameworks implement
best J2EE practices to achieve high performance and other advantages of
J2EE. Some popular J2EE frameworks are Struts, Spring etc.
. - J2EE Best Practices :People
have found ways to utilize J2EE framework in such a way that it can
perform at its best and also it can be utilized with its all advantages
like sociability, easy to maintain, flexibility, remote access etc. Such
practices are used by many developers and proven to be useful to
achieve such goals in J2EE applications. and are also known as J2EE best
practices. Most J2EE frameworks and design patterns are implemented in
such a way that they implement some proven best practices.
. - New Technologies :The Java community which is controlled by Sun keeps including new features and technologies to J2EE such as JFS (Java Faces Service), Java.net, Java gaming, Java AI etc.
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