setPageIncrement(int pageIncrement) {
public void setPageIncrement(int pageIncrement) {
setPageIncrement(int pageIncrement){  if (pageIncrement < 0)    throw new IllegalArgumentException ("Block increment less than zero.");  int range = maximum - minimum;  if (pageIncrement > range)    {      if (range == 0)        pageIncrement = 1;      else        pageIncrement = range;	}  if (pageIncrement == this.pageIncrement)    return;  this.pageIncrement = pageIncrement;  ScrollbarPeer peer = (ScrollbarPeer) getPeer ();  if (peer != null)    peer.setPageIncrement (this.pageIncrement);}