The art and science of concealing secret messages in such a way that no one apart from the intended recipient knows about the existence of the message. In digital information, Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video.
Procedures that allow us to control and define the behavior of an object.
A mutable list of object references. We can create ArrayLists by using the constructor new ArrayList<E>().
