Is possible to install and configure Sun Java Application Server 9.1, Tomcat 6.0, Jboss-web2.1.1.CR3 with Netneans IDE at same time? Can I use these server with eclipse3.2.2.? I want to use them when any of them, is required, by stopping one server and starting another.
Yes you should be able to configure all of these servers in Eclipse at the same time. When deploying/running an application you should be able to specify which one to use. (This should also hold true for NetBeans, but I am not a NetBeans user.)
If you want to run them at the same time, you will have to make certain that their ports do not conflict. For example, both Tomcat and JBossWeb use the same HTTP port (8080), so you will have to configure one of them to use a different HTTP port.
Repeat for every port conflict - I suggest that you resolve the port conflicts outside the IDE before attempting to run within the IDE.