I\'d like to create a simple Swing app. I\'ve got very, very, very little experience with Swing, however. I want to create a one window app that refreshes every 5 minutes
Well, for the every five minutes bit, java.util.TimerTask should be of help. For general Swing information, this link to the Java Tutorials ought to help.
To have a Window, specifically, JFrame is probably your best bet.
To display single or multiline text, you ought to look into JLabel or JTextArea, respectively.
To display images, ImageIcon ought to do the trick.
For other needs, the Java Tutorial ought to be a big help.
As trashgod suggested, javax.swing.Timer has some advantages when it comes to GUIs over java.util.TimerTask. This article on using timers in Swing applications should help you decide which to use.