impl: cll iterator

assignment/src/main/java/appointmentplanner/customlist/CustomLinkedListImpl.java

@@ -10,8 +10,7 @@ public class CustomLinkedListImpl<T> implements CustomLinkedList<T> {
 
   @Override
   public Iterator<T> iterator() {
-    // TODO Auto-generated method stub
-    throw new UnsupportedOperationException("Unimplemented method 'iterator'");
+    return new CustomLinkedListIterator<T>(this);
   }
 
   @Override

assignment/src/main/java/appointmentplanner/customlist/CustomLinkedListIterator.java

@@ -0,0 +1,30 @@
+package appointmentplanner.customlist;
+
+import java.util.Iterator;
+import java.util.Iterator;
+
+public class CustomLinkedListIterator<T> implements Iterator<T> {
+
+  private CustomLinkedListImpl<T> list;
+
+  private CustomLinkedListNode<T> lastNode;
+
+  public CustomLinkedListIterator(CustomLinkedListImpl<T> listToIterate) {
+    list = listToIterate;
+    lastNode = list.head;
+
+  }
+
+  @Override
+  public boolean hasNext() {
+    return lastNode.getNext() != null;
+  }
+
+  @Override
+  public T next() {
+    T item = lastNode.getItem();
+    lastNode = lastNode.getNext();
+    return item;
+  }
+
+}