// Fig. 21.12: QueueTest.java
// Class QueueTest.
import com.deitel.datastructures.Queue;
import java.util.NoSuchElementException;

public class QueueTest {
   public static void main(String[] args) {
      Queue<Integer> 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
      boolean continueLoop = true;

      while (continueLoop) {
         try {
            int removedItem = queue.dequeue(); // remove head element
            System.out.printf("%n%d dequeued%n", removedItem);
            queue.print();
         } 
         catch (NoSuchElementException noSuchElementException) {
            continueLoop = false;
            noSuchElementException.printStackTrace();
         } 
      } 
   } 
}



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