// Fig. 17.14: QueueTest.java
// Class QueueTest.
import com.deitel.jhtp7.ch17.Queue;
import com.deitel.jhtp7.ch17.EmptyListException;

public class QueueTest 
{
   public static void main( String args[] )
   {
      Queue queue = new Queue();  

      // use enqueue method
      queue.enqueue( -1 );
      queue.print();
      queue.enqueue( 0 );
      queue.print();
      queue.enqueue( 1 );
      queue.print();
      queue.enqueue( 5 );
      queue.print();

      // remove objects from queue
      try 
      {
         Object removedObject = null;

         while ( true ) 
         {
            removedObject = queue.dequeue(); // use dequeue method
            System.out.printf( "%s dequeued\n", removedObject );
            queue.print();
         } // end while
      } // end try
      catch ( EmptyListException emptyListException ) 
      {
         emptyListException.printStackTrace();
      } // end catch
   } // end main
} // end class QueueTest


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