Recently I've been reading "Head First Design Patterns" as well as
"Java 1.5 Tiger - A Developer's Notebook". Both are really good
books by the way. I was reading the chapter on the State design
pattern when it occurred to me that the new Enum feature in J2SE 5.0
would be a perfect way to implement the state design pattern.
Typically, the state pattern is used to model a state transition...