Printing the applets in these tutorials works
best with the latest Java VM, a free download at http://java.sun.com .
If the text of these tutorials print, but the applets leave blank spaces on the pages, download and install the new VM.
If the applet below works OK, you can do the tutorials:
In the applet below, you should see a crude graph and a rectangular button.
Clicking the button changes the button to look like it has been "pressed"
and causes the graph to change. "Press" the button again, and the graph changes
back. If the button disappears when pressed, and the graph doesn't
change, download a new version of your browser and then go to http://java.sun.com/j2se/ to get the latest Java runtime.