/**
  * Checks if this chronology instance equals another.
  *
  * @param obj the object to compare to
  * @return true if equal
  * @since 1.6
  */
 public boolean equals(Object obj) {
   if (this == obj) {
     return true;
   }
   if (obj instanceof BuddhistChronology) {
     BuddhistChronology chrono = (BuddhistChronology) obj;
     return getZone().equals(chrono.getZone());
   }
   return false;
 }