/* Java class that, together with child classes, demonstrates polymorphism
** and dynamic dispatch.
*/
public class Animal {

   public String utterance() { return "silence"; }

   /* Prints the result of the utterance() method the specified # of times.
   ** Note that the version of utterance() that is called here depends
   ** upon which class the "target object" is a (direct) member of.
   */
   public void speak(int n) {
      for (int i=0; i != n; i++) {
         System.out.print(this.utterance() + ' ');
      }
      System.out.println();
   }

}