How to use REST API to do a GET request on a Jazz server

Hello everybody.

I'm trying to create a java app that is able to return an xml/html/whatever-legible-format string with the content of a certain web page (i have userid and pass).
The link is something like: https://hostname:port/jazz/web/projects/TWS_Distr?#action=com.society.team.workitem.runSavedQuery&id=alotofnumbersandletters

The page contains a list of rows of a table, and i need to get that table content with my java app.

I tried to follow many tutorials and guides to use the REST API, but I think I'm missing something important to be able to finish this task.

Thank you.