code: public void setMajorTickSpace(final double SPACE) {
          if (null == majorTickSpace) {
              _majorTickSpace = SPACE;
              fireUpdateEvent(RECALC_EVENT);
          } else {
              majorTickSpace.set(SPACE);
          }
      }
docs: Defines the value that represents the space between major
  tickmarks. This value will be automatically set by the
  autoscale property. Be careful when changing it manually.
  
  @param SPACE