import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;

/** Demo using iterator to remove.
    @author Jed Yang, 2017-01-23
*/
public class IteratorDemo
{

   public static void displayList(List list)
   {
      for (int i = 0; i < list.size(); i++)
      {
         System.out.print(list.get(i) + " ");
      }
      System.out.println();
   }

   public static void main(String[] args)
   {
      List<Integer> list = new ArrayList<Integer>();
      
      for (int i = 0; i < 10; i++)
      {
         list.add(i);
      }

      displayList(list);

/*
      for (int i = 0; i < list.size(); i++)
      {
         if (i % 2 == 0) // if i is even
         {
            int removed = list.remove(i);
            System.out.println("removed " + removed + " at index " + i);
         }
      }
      displayList(list);
//*/


//*
      Iterator<Integer> iter = list.iterator();
      int i = 0;
      while (iter.hasNext())
      {
         int value = iter.next();
         System.out.println(value);

         if (i % 2 == 0) // if i is even
         {
            iter.remove();
            System.out.println("remove element #" + i);
         }
         i++;
      }
      displayList(list);
//*/

//*
      for (int value : list)
      {
         System.out.println(value);
      }
//*/
   }
}