private static int lastIndexOf(Object o,Object[] elements,int index){
  if (o == null) {
    for (int i=index; i >= 0; i--)     if (elements[i] == null)     return i;
  }
 else {
    for (int i=index; i >= 0; i--)     if (o.equals(elements[i]))     return i;
  }
  return -1;
}

private static int lastIndexOf ( Object o , Object [ ] elements , int index ) { if ( o == null ) { for ( int i = index ; i >= 0 ; i -- ) if ( elements [ i ] == null ) return i ; } else { for ( int i = index ; i >= 0 ; i -- ) if ( o . equals ( elements [ i ] ) ) return i ; } return - 1 ; }
static version of lastindexof .
