Another issue, which is of concern to enterprises, is the portability and scalability of their enterprise applications. An enterprise application is viable only when it is easily portable across platforms and devices. Scalability is also another parameter, which decides the long-term feasibility of an application you can log on www.viral-toolbar-builder.com Enterprise applications must be scalable so that they can be scaled up to accommodate thousands of users simultaneously. J2EE based enterprise applications can be executed across platforms and are functional across devices.



J2EE Development services for established as well as emerging companies across the world.

1. Multi-platform support language and support for web-services also

2. Develop dynamic web applications for e commerce, e learning, polls, HTML forms processing, and more.

3. Combine Java technology-based applications or services to create highly customized applications or services.

The J2EE platform provides a multi-tiered distributed application model, the ability to reuse components, a unified security model, and flexible transaction control. Not only can you deliver innovative customer solutions to market faster than ever, but your platform independent J2EE component based solutions are not tied to the products and APIs of any one vendor. .

The J2EE specification defines the following kinds of components:

Servlet and Java Server Pages (JSP) components (also called Web components): These typically execute in a web server and respond to HTTP requests from web clients. Servlet and JSP pages may be used to generate HTML (or even XML) pages that are an application's user interface.

Enterprise Java Beans (EJB) components: These execute in a managed environment that supports transactions. Enterprise beans typically contain the business logic for a J2EE application

it is always advisable for outsourcing Java to a company which houses experienced and technically qualified Java professionals which ensures best services and that too in perfect quality.

J2EE or the Java to Enterprise Edition platform developed by Sun Microsystems stipulates the criterion for developing multi-tier enterprise applications. The J2EE platform leverages the robustness of the Java programming language that allows developers to write the code only once and execute the application on any platform. Presently more than two-thirds of development managers use the J2EE platform to develop and deploy their applications.

The user level web application are generally created in the simple HTML, DHTML, sometimes the complex COM and Java script applets. Most of the software's that were developed earlier were based on the client server architecture, which needed it to be installed separately in each of the user's computer. Upgrading such web application became extremely difficult as it involved upgrading each and every machine in which it was earlier installed. Another hassle that the client server custom application development required was to license it every time you installed a web application in your computer.

Most database driven applications that are developed using open source technologies have a three-tier structure. The web application itself runs in the browser of a desktop or a laptop. Users can only access the front end of the application to input data or search strings. Java being platform independent allows applications to be accessed on any device like a pda or cell phone or any telnet device.

Enterprise Java bean application development occurs by employing a three-tier architecture consisting of a front end known as the web container, an EJB container, the third tier being the database. This three-tier structure has proved to be immensely useful for enterprise application development.

A web application developed in 3 tiers stage: User services, business services, & data services. The User service tier creates a visual gateway for the consumer to interact with the application. This can range from basic HTML and DHTML to complex COM components and Java applets.

Java API for XML Processing (JAXP): Designed to assist applications in parsing and transforming XML documents.

Java Naming and Directory Interface (JNDI): Defines methods that perform directory operations, such as searching for objects using their attributes and associating attributes with objects.

Java Architecture for XML Binding (JAXB): Provides a binding compiler and a runtime framework to map Java objects to XML documents. This functionality makes it possible to ensure that the system accepts and processes only valid messages. The compiler automatically translates World Wide Web Consortium (W3C) XML schema into Java classes, keeping you from having to write any complex parsing code.

What are the Advantages of Application Development in J2EE?

Faster solutions delivery time to market. The J2EE platform uses “containers” to simplify development. J2EE containers provide for the separation of business logic from resource and life cycle management.

Possibly, the benefits of the J2EE applications are already apparent, but some people will also claim that they just add extra bloat and complexity. We feel however that they are of great importance.

The J2EE specification states that the main goals of the J2EE application concept are “to provide scalable modular application assembly and portable deployment of J2EE applications into any J2EE product”. What this means is that there are basically two goals, compatibility and making it easy to distribute prefabricated J2EE applications.

#Platform independent

# centrally managed

# more scalable & more secure

Container-managed relationships support both one-to-one and one-to-many relationships between entity beans. (Entity beans are Java classes that represent business objects in a persistent storage mechanism — for example, a particular row in a database.) With one-to-many relationships, an entity bean uses a Java collection to represent the many side. The ability to manage such a relationship is similar in concept to relationship modeling in modern relational database technology.

Web applications are becoming more and more like “normal” desktop applications. Of course, they are more and more functional, but smooth user interface acts the primary role. So we have drag and drop, auto competition, and much more. Many of those nice features got possible only with help of AJAX

Java Script are often ridiculed as the black sheep of programming languages. The development tools, a complicated and inconsistent document object model for HTML pages and inconsistent implementation in browsers contributes to that sentiment or visit www.software-designers-pro.com But Java Script is much more than a toy. In this article, Bruce Tate explores Java Script's language features.

Nearly every Web developer has cursed Java Script at one time or another. The beleaguered language sags under the weight of a complex programming model called the document object model (DOM), poor tools for implementation and debugging, and inconsistent browser implementations. Until recently, many developers had all but written off Java Script as a necessary evil at best or a toy at worst.