The following book may be useful to those of us who are learning Java or are just curious. Thanks to our new member, Sina Bahram, for this information. Thinking in Java, 4th Edition, $25, but you can download the first 7 chapters free. from http://www.mindviewinc.com/Books/TIJ4/PurchaseBook.php John -- John J. Boyer; President, Chief Software Developer Abilitiessoft, Inc. http://www.abilitiessoft.com Madison, Wisconsin USA Developing software for people with disabilities