I would like to nominate this article for the "best of the year"

Thanks Bill. I know I ran the code so perhaps I missed it during the cut-and-paste operation.

This is a very nice article. I did find what appears to be an error in the source code. The Person class is missing a getSSN() method. I fixed the problem by writing this method:

public Object getSSN() {
return this.toString();
}

Superbly written with lovely clear diagrams. Good work. Not many authors explain things this well.

As Einstein said "if you can''t explain your work to a 10 year old, you''re a charlatan." This author is no charlatan.

Ditto! what Shilpi said,This author is very well organized and excelent detail!

One of the most articulate and intelligent publishings I have read in a long time. I look forward to reading and hearing more from this author.