public double exponentLengthToJava2D(double length,Rectangle2D area,RectangleEdge edge){
  double one=valueToJava2D(calculateValueNoINF(1.0),area,edge);
  double l=valueToJava2D(calculateValueNoINF(length + 1.0),area,edge);
  return Math.abs(l - one);
}

public double exponentLengthToJava2D ( double length , Rectangle2D area , RectangleEdge edge ) { double one = valueToJava2D ( calculateValueNoINF ( 1.0 ) , area , edge ) ; double l = valueToJava2D ( calculateValueNoINF ( length + 1.0 ) , area , edge ) ; return Math . abs ( l - one ) ; }
converts a length in data coordinates into the corresponding length in java2d coordinates .
