public class CuckooClock extends Clock
CuckooClock is a Clock that cuckoos when the 
 minute is zero. The primary purpose of this class is to demonstrate how an
 extended class is implemented.
 Java Source Code for this class:
   
   http://www.cs.colorado.edu/~main/edu/colorado/simulations/CuckooClock.java
   Clock| Constructor and Description | 
|---|
| CuckooClock() | 
| Modifier and Type | Method and Description | 
|---|---|
| boolean | isCuckooing()Check whether this  CuckooClockis currently cuckooing. |