Uncle Bob's Agile Development Corner
ObserverEvolving into a pattern, Part 1
by Robert C. Martin
Listing 9. TimeSource.java.
public interface TimeSource
public void setObserver(ClockObserver observer);
Robert C. Martin is president of Object Mentor Inc., a firm that offers high-level, OO software design consulting, training, and development services. He is the author of Designing Object Oriented C++ Applications Using the Booch Method. He can be contacted at email@example.com.