(Post 04/07/2006) In today s world of internet and web applications, two technologies make application development easy with its features and tools. Now, we will be comparing the two technologies in detail: The J2EE Technology from Sun Microsystems and The .NET Technology from Microsoft Corporation.

As they are intended at, both of these technologies focus on one common goal, that is to build applications on a framework and provide the applications as a service to end users.

What is .NET?

.net is a new platform for digital era which contains a set of software bundled together.

.net Technologies

The .net Technologies is a strategy from Microsoft for delivering software as a service.

.net framework

The .net framework is an environment for building, deploying and running web services and other applications. It contains 3 parts: namely Common Language Runtime (CLR), framework classes and ASP.net. Also it is packaged with a support for XML web services.

Visual Studio.net

Visual Studio.net provides a rich set of features and productivity tools that allows to rapidly create enterprise applications for web services platform.

Application Platforms Today

The different applications reside over the operating systems, above which the Runtime environment and the standard library resides. The operating systems and the applications are distinguishly separated by standard library and Runtime environment.

Now looking into the .net Framework

The different applications reside over the Windows operating systems, above which the Common Language Runtime and the .NET Framework Class library resides. The .NET Framework Class Library contains a set of libraries like Windows Forms, Enterprise Services, ASP.net, ADO.net and other libraries.

Now looking into the Java environment

The different applications reside over the different operating systems, above which the Java Virtual Machine and the Java Packages resides. The Java Packages contains a set of libraries like Swing, Enterprise Java Beans, Java Server Pages, JDBC and other libraries.

.net Framework Applications

The .net framework application depends upon the CLR known as Common Language Runtime. The CLR provides a common set of datatypes across all the dfferent languages supported by the .net framework. The CLR-based programming languages generates an intermediate language.

Process of compilation and execution

In the process of compilation, the source code is compiled using the language compiler into Microsoft Intermediate Language.

When the first time each method is called, execution takes place through the JIT (Just In Time) compiler which compiles to native code.

Comparision of Runtime Environments

With respect to .net framework, MSIL is used as the intermediate language and a JIT compilation is provided.

With respect to Java, bytecode is used as the intermediate language and java VM with JIT compilation is used.

Languages in .net

Visualstudio.net mainly supports

• C#
• VB.net
• C++
• Jscript

These languages can be used for creating object oriented programs to ensure reusability of code across different languages.

Similarities between Java and C#

Both Java and C# are object oriented with their syntax derived from c. They support single inheritance and multiple interface inheritance.

Differences between Java and C#

C# provides attributes, properties and Direct memory access using Unsafe code. The .net framework class library is written in c#, Accessible from any language targeting the CLR, organized into namespaces which are below the system namespace.

.net vs Java : Standard libraries

.net framework class library defined by Microsoft is organized into a hierarchy of namespaces. J2SE, J2EE defined by Sun and Java community process, is defined as packages and interfaces.

Web services support

.net framework class library:

Implements ASP.net asmx pages through system.web.services and provides SOAP support for remote access by System.Runtime.Remoting namespace.

JAVA Class library:

With respect to implementation of Web services in JAVA, that latest versions of JDK will be released with full support to web services.

Technology comparision in brief

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