I am trying to use the method from the dom4j Library to insert new
element it to an existing xml but I keep getting an error. Is any one
familiar with the dom4j Library? I need help. I am new to Dom4j.
Inserting elements sometimes it's necessary to insert an element in a
existing XML Tree. This is easy to do using dom4j Collection API.
Need help thanks

   public void insertElementAt(Element newElement, int index) {
     Element parent = this.element.getParent();
     List list = parent.content();
     list.add(index, newElement);
   }

   public void testInsertElementAt() {

   //insert an clone of current element after the current element
     Element newElement = this.element.clone();
     this.insertElementAt(newElement,
this.root.indexOf(this.element)+1);

   // insert an clone of current element before the current element
     this.insertElementAt(newElement,
this.root.indexOf(this.element));
   }