[CTCI] ch 8: Object Oriented design

1. Abstract, Interface, and inner class
http://www.oxfordmathcenter.com/drupal7/node/35
(Korean) http://cafe.naver.com/funcc/28863

2. Abstract? extends?
(Korean) http://cafe.naver.com/flashdev/35422
(Korean) http://cafe.naver.com/workdata/141

3. Abstract Class and Abstract function class diagram
http://www.eng.umd.edu/~austin/ence200.d/java-examples.html

4. Class diagram for Generics
http://stackoverflow.com/questions/4786771/uml-class-diagram-and-generics
http://www.eclipse.org/modeling/mdt/uml2/docs/articles/Defining_Generics_with_UML_Templates/article.html
http://blog.lieberlieber.com/2013/02/08/how-to-model-generics-net-c-with-enterprise-architect/