You can download Tomcat Application Server from http://tomcat.apache.org, and install it from there.
You can start and stop Tomcat from the command line, as follows:
When you generate a client and a J2SE Bean together, a .war file is generated and placed into the my-project/repos/my-service.deploy directory. The simultaneous generation of both a client and J2SE Bean is supported for Tomcat only.
You can undeploy an application .war file from a Web browser providing a URL constructed as follows:
http://servername:port/manager/text/stop?undeploy=/application-context
For further information, see the official Tomcat Web site.