There is a good free tutorial on generics: https://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf https://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf. It e

There is a good free tutorial on generics: https://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf https://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf. It explains the design of generics, and tells a bit about why Sun engineers came up with this implementation.