code: public void setTickSpacing(double minorTickSpacing, int multiplicator) {
  			if(Double.isInfinite(minorTickSpacing) || Double.isNaN(minorTickSpacing))
  				throw new NumberFormatException("Infinite or NaN");
  			if(multiplicator <= 0)
  				throw new IllegalArgumentException("Multiplicator negative or 0");
  			this.minorTickSpacing = minorTickSpacing;
  			this.tickMultiplicator = multiplicator;
  			setFormat();
  			setTicks();
  		}
docs: Sets the tick spacing.<br>
  <code>minorTickSpacing</code> sets the minor tick spacing,
  major tick spacing is a multiple of minor tick spacing and determined with the help of <code>multiplicator</code>
  @param minorTickSpacing Minor tick spacing
  @param multiplicator Multiplicator for detrermining the major tick spacing.