ServiceTango is distributed with a ready to run instance, already pre-configured to run these examples.
Just go to the <ServiceTango-Home> directory and type:

Hello Servlet

The Hello servlet displays "Hello, World!".

To install the Hello servlet install the Hello Servlet bundle into a running ServiceTango instance by using the URL file:///<ServiceTango-Home>/src/examples/org/servicetango/service/http/META-INF.jar

The Hello Servlet bundle will register a servlet with the local HTTP service. This servlet will by installed into the local web server namespace at /hello. After installing the Hello Servlet bundle the Hello Servlet may be accessing with a web browser using the URL http://<local-machine-name>/hello.