JAXTUT error starting sample server

[Claudio Passarella]

I started today to learn AJAX for java.

I use a PC in windows 7, 32 bits

I downloaded the tutorial from:

     http://www.jaxtut.com/

I started the sample server from the command window:

     java -jar jaxtut.jar

I got the following errors:

Exception occurred during event dispatching:

java.lang.NoClassDefFoundError: java/util/prefs/Preferences

        at jaxtut.ui.JaxtutMain.<init>(JaxtutMain.java:23)

        at jaxtut.ui.JaxtutMain$3.run(JaxtutMain.java:230)

        at java.awt.event.InvocationEvent.dispatch(Unknown Source)

        at java.awt.EventQueue.dispatchEvent(Unknown Source)

        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)

        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

        at java.awt.EventDispatchThread.run(Unknown Source)

I would appreciate assistance to start this server.