code: public boolean add (int[] values)
      {
          boolean modified = false;
          int vlength = values.length;
          for (int i = 0; i < vlength; i++) {
              modified = (add(values[i]) || modified);
          }
          return modified;
      }
docs: Add all of the values in the supplied array to the set.
  
  @param values elements to be added to this set.
  
  @return <tt>true</tt> if this set did not already contain all of the specified elements.