import java.util.LinkedList;

public class TestQueue {
  
  static public void main(String[] args) {
    LinkedList<Integer> aQueue = new LinkedList<Integer>();
    boolean ok = true;
    Integer item;

    if (aQueue.isEmpty()) {
      System.out.println("The queue is empty");
    } // end if
  
    for (int i = 0; i < 5; i++) {
      aQueue.add(i); // With autoboxing, this is the same as 
                     // aQueue.add(new Integer(i))
    } // end for
  
    while (!aQueue.isEmpty()) {
      System.out.print(aQueue.peek()+ " ");
      item = aQueue.remove();
    } // end while
    System.out.println();
    
  } // end main
  
} // end TestQueue