A web application is a structured hierarchy of directories. The folder webapps is the home directory of Tomcat web server. This is the main folder for the “public” section. The MI framework and applications will be stored in the JavaJazzup folder and its subfolders.

A special directory exists within this application hierarchy called WEB-INF. The WEB-INF folder is the main folder of the “private” section of a Web application.

5. Take your compiled servlet class file as "HelloWorld.class” and place them in the WEB-INF/classes directory. If you have defined your servlet to belong in a package, you must follow the standard Java rules and create the appropriate subdirectories so the JVM will be able to find your classes.

6. Put the created xml file as “web.xml” file in the WEB-INF directory. This XML file is the deployment descriptor for servlets and other components that make up the application.

7. To test your servlet, start the Tomcat server clicking the startup.bat file from the bin directory.

8. Once the server is start, open a Web
browser, and open a URL of the following
form:

http://{address}:{port}/{servletName}
where:

• address is the name or IP address of
  the machine running Tomcat. You can
  use localhost if the browser is running
  on the same machine as Tomcat.
• port is the port on which Tomcat is
  listening. By default, that is port 8080.
• servletName is the name of the servlet
  you want to invoke. That should match
  the value contained in the <urlpattern></
  url-pattern> tags in the
  web.xml deployment descriptor file.

For example, if Tomcat is running on the same machine as the browser and listening on the default port (8080), you can test HelloWorld servlet by opening the following URL:
http://localhost:8080/JavaJazzup/HelloWorld The output of the program is given below: