Re: iterator over superclass of collection

Tom Hawtin <usenet@tackline.plus.com> writes:


Frank Fredstone wrote:


No, but it would give you what you need from an iterator.

Does this give you enough of what you want?

<scce>
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
public class WildIteration
{
   static interface Aye
   {
     void doIt();
   }

   static class PrivateAye implements Aye
   {
     public void doIt()
     {
       System.out.println( "PrivateAye.doIt()" );
     }
   }

   public static void main( String [] args )
   {
     List<PrivateAye> pis = new ArrayList<PrivateAye>();
     pis.add( new PrivateAye() );

     Collection <? extends Aye> c = pis;
     Iterator<? extends Aye> it = c.iterator();
     while ( it.hasNext() )
     {
       Aye aye = it.next();
       aye.doIt();
     }
   }
}
</scce>

--
Lew