Using an XML Parser on a String List in Java

I'm currently working on a project that requires that I get some XML data from the NPR News Feed and parse it so that a GUI only displays the title of an article, the article's description, and the most commonly used words in the article (excluding syntax words, i.e. a, an, the, for, but, etc.). How would I go about doing that?

[EDIT] I also have something pulling the XML from the page and putting each line into an ArrayList. I'm curious how I would parse the strings for the required data.