By Corey Roth, Senior Web Developer
Special to ZDNet
Fo r a while, the Java 2 Enterprise Edition (J2EE) architecture looked like the best way to develop multi-tiered applications. Java Server Pages (JSP) and servlets had many advantages over the Active Server Pages (ASP) and Component Object Model (COM+) platforms. However, I think that is about to change with Microsoft .Net on the horizon. Microsoft .Net is providing a similar platform but with more functionality, and it quite possibly could have the foundation for being cross-platform at some stage. According to Sun, JSP is better than ASP for the following reasons: It has platform and server independence, it has extensible JSP tags and ASP is interpreted. Luckily, ASP .Net changes all of this.
The biggest argument why Java is superior is that it is a cross-platform environment. Having cross-platform is great, but at what cost? Java is slow by design. With Java, every time you run your program it goes through the Java Virtual Machine, an interpreter, which then converts the Java byte codes to native code. Microsoft may end up having support for platform independence with the way programs are compiled with Microsoft .Net.
When a program is compiled with .Net, it is compiled into a DLL or EXE in Microsoft Intermediate Language (MSIL) format, a processor independent assembly language. MSIL does not contain any dependencies on any particular operating system or architecture. The first time this EXE is executed, it uses Just In Time (JIT) compilation to convert the MSIL into native code. So the first time you run it, i
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