// Speaker Example

// This Dog class is derived from the abstract class
// Animal.  This class also implements the
// Speaker interface, which means that it supplies
// a speak method.

public class Dog extends Animal implements Speaker
{
    public Dog(String theName)
    {
        super(theName);
    }

    public void speak( )
    {
        System.out.println("Woof.");
    }

    public String toString( )
    {
        return "Dog: " + name;
    }
}