code: public static int convertBondStereo(IBond bond) {
          int value = 0;
          switch (bond.getStereo()) {
              case UP:
                  value = 1;
                  break;
              case UP_INVERTED:
                  value = 1;
                  break;
              case DOWN:
                  value = 6;
                  break;
              case DOWN_INVERTED:
                  value = 6;
                  break;
              case UP_OR_DOWN:
                  value = 4;
                  break;
              case UP_OR_DOWN_INVERTED:
                  value = 4;
                  break;
              case E_OR_Z:
                  value = 3;
                  break;
              default:
                  value = 0;
          }
          return value;
      }
docs: Get stereo value as integer
  @param bond