There are lots of J2EE Application development technologies&tools on the earth but we know only a few of those...

In Japan and India, People tend to use Tomcat+Apache+JavaSDK technologies for developing J2EE application. and IDE is Eclipse...
then when the application becomes a product version, we simpliy change servers that are Tomcat+Apache to WebLogic/WebSphere if we need higher performance and more reliability.

It is because when they were new beas, those techs were poplar and lots of study material in bookstore and Internet articles..and they were lighter from performance perspective than other application server..

Java technologies cover more and more in various fields.
You could know just you access Sun website and says and introduces lots of teshs..
NetBeans<==>Eclipse
Tomcat<==>GlassFish
Oracle,PostgreSQL...<==>MySQL(it finally became part of Sun!!)


Most of java developer know a lot of about Tomcat, Eclipse and several Apache foundation tools and something about Database side (i.e.Oracle) in Japan,India.
But that's all..


To tell all of you the truth I am also one of that kind guy.... but I just wanted to know other part in Java technologies.
such as, GlassFish application server, javax.activation package(part of J2EE), JAXP..related to WebServices(like Axis)..

There will be a lot of fun and new world for those developers.