Rectangle Structure

Here is a pretty good link that shows all of the different results using the different method from the Rectangle class such as Union, Intersection, Inflate, etc.:

http://www.java2s.com/Tutorial/VB/0300__2D-Graphics/CreateRectangleFromSizeAndPoint.htm

Simple XOR String Encryption

Here is a posting I found on how to Encrypt Strings with an XOR operation:

http://www.eggheadcafe.com/tutorials/aspnet/8b53894c-a889-4914-8c46-122980cc44ae/simple-xor-encryption.aspx