IndexListIterator che implementa Iterator mediante un array list. Implementazione di Iterator mediante cursore : ElementIterator per PositionList. Aggiunti alcuni metodi e spostato le classi IndexListIterator,ElementIterator nel package Iterator.

sequence/ArraySequence.java

@@ -4,6 +4,7 @@ import exceptions.BoundaryViolationException;
 import exceptions.EmptyListException;
 import exceptions.EmptySequenceException;
 import exceptions.InvalidPositionException;
+import iterator.IndexListIterator;
 import position.Position;
 import sequence.utility.ArrayPosition;
 
@@ -287,12 +288,14 @@ public class ArraySequence<E> implements Sequence<E> {
 
 
     @Override
+    ///////////////// implemented used a generic IndexListIterator
     public Iterator<E> iterator() {
-        return null;
-    }
 
-    @Override
-    public Iterator<Position<E>> positions() {
-        return null;
+        E[] temp = (E[])new Object[this.size()];
+        for (int i = 0 ;i < this.size(); i++){
+            temp[i] = this.get(i);
+        }
+        return new IndexListIterator<E>(temp);
+
     }
 }