Java encryption program

I need a java program that deals with encryption. You can pick either of the following two. Whatever is easier. * Create an application that create a cipher (of entered text) using your preferred encryption method. * Create an application that implements RSA encryption algorithm Note: You are allowed to copy anything from the web, just make it look a little different. Note 2: You must also create a power point with at least 8 slides for presentation of the program.