/* StringSorterLexico.java
** An instance of this class has methods (inherited from its parent)
** by which to sort an array (or a segment thereof) of Strings into 
** ascending order.  It supplies the body of isLessThan() for the
** purpose of defining/implementing an ordering on strings.  Here, 
** that is the classic lexicographic ordering, which is what the
** String class's compareTo() method provides.
*/
public class StringSorterLexico extends StringSorter {

   /* Returns true iff s1 < s2 according to the String class's 
   ** compareTo() method, which implements lexicographic ordering.
   */
   @Override
   protected boolean isLessThan(String s1, String s2) {
      return s1.compareTo(s2) < 0;
   }
}