// Fig. 19.14: QueueInheritanceTest.java
// Class QueueInheritanceTest

// Deitel packages
import com.deitel.jhtp4.ch19.QueueInheritance;
import com.deitel.jhtp4.ch19.EmptyListException;

public class QueueInheritanceTest {

   // test class QueueInheritance 
   public static void main( String args[] )
   {
      QueueInheritance queue = new QueueInheritance();  

      // create objects to store in queue
      Boolean bool = Boolean.TRUE;
      Character character = new Character( '$' );
      Integer integer = new Integer( 34567 );
      String string = "hello";

      // use enqueue method
      queue.enqueue( bool );
      queue.print();
      queue.enqueue( character );
      queue.print();
      queue.enqueue( integer );
      queue.print();
      queue.enqueue( string );
      queue.print();

      // remove objects from queue
      try {

         // use dequeue method
         Object removedObject = null;

         while ( true ) {
            removedObject = queue.dequeue();
            System.out.println( removedObject.toString() +
               " dequeued" );
            queue.print();
         }
      }

      // process exception if queue empty when item removed
      catch ( EmptyListException emptyListException ) {
         emptyListException.printStackTrace();
      }

   }  // end method main

}  // end class QueueInheritanceTest


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 * (C) Copyright 2002 by Deitel & Associates, Inc. and Prentice Hall.     *
 * All Rights Reserved.                                                   *
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