if (unitIncrement < 0) throw new IllegalArgumentException("Unit increment less than zero.");  int range = maximum - minimum; if (unitIncrement > range) { if (range == 0) unitIncrement = 1; else unitIncrement = range; }  if (unitIncrement == lineIncrement) return;  lineIncrement = unitIncrement;  ScrollbarPeer sp = (ScrollbarPeer)getPeer(); if (sp != null) sp.setLineIncrement(lineIncrement);
setLineIncrement (unitIncrement);
setUnitIncrement(int unitIncrement){  if (unitIncrement < 0)    throw new IllegalArgumentException("Unit increment less than zero.");  int range = maximum - minimum;  if (unitIncrement > range)    {      if (range == 0)        unitIncrement = 1;      else        unitIncrement = range;    }  if (unitIncrement == lineIncrement)    return;  lineIncrement = unitIncrement;  ScrollbarPeer sp = (ScrollbarPeer)getPeer();  if (sp != null)    sp.setLineIncrement(lineIncrement);}