import java.util.*;

public class JavaIteratorTester
{
  private java.util.ListIterator<Integer> itr;
  private LinkedList<Integer> lst;
  
  public JavaIteratorTester (LinkedList<Integer> el)
  {
      lst = el;
      itr = lst.listIterator( );
  }
  
  public boolean hasNext()
  {
      return itr.hasNext();
  }
  
  public Integer next()
  {
      return itr.next();
  }
  
  public boolean hasPrevious ()
  {
      return itr.hasPrevious();
  }
  
  public Integer previous ()
  {
      return itr.previous();
  }
}