Implementato parzialmente l'arraysequence

position/NodePositionList.java

@@ -1,7 +1,6 @@
 package position;
-import java.util.Iterator;
 import  exceptions.*;
-import stack.utility.Node;
+import position.utility.DNode;
 
 /**
  * Realization of a PositionList using a doubly-linked list of nodes.

position/utility/DNode.java

@@ -1,5 +1,7 @@
-package position;
+package position.utility;
 import  exceptions.*;
+import position.Position;
+
 /**
  * A simple node class for a doubly-linked list.  Each DNode has a
  * reference to a stored element, a previous node, and a next node.