//********************************************************************//  UnorderedListADT.java       Authors: Lewis/Chase////  Defines the interface to an unordered list collection. Elements//  are stored in any order the user desires.//********************************************************************package jss2;public interface UnorderedListADT<T> extends ListADT<T>{   /**  Adds the specified element to the front of this list */   public void addToFront (T element);   /**  Adds the specified element to the rear of this list */   public void addToRear (T element);   /**  Adds the specified element after the specified target */   public void addAfter (T element, T target);}