//********************************************************************
//  Talking.java       Author: Lewis and Loftus
//
//  Demonstrates the use of an interface for polymorphic references.
//********************************************************************

class Talking
{
   //-----------------------------------------------------------------
   //  Instantiates two objects using an interface reference and
   //  invokes one of the common methods. Then casts the interface
   //  reference into a class reference to invoke its unique method.
   //-----------------------------------------------------------------
   public static void main (String[] args)
   {
      Speaker current;

      current = new Dog();
      current.speak();

      current = new Philosopher ("I think, therefore I am.");
      current.speak();

      ((Philosopher) current).pontificate();
   }
}