http://java.sun.com/javase/6/docs/api/java/awt/geom/CubicCurve2D.Double.html#CubicCurve2D.Double()
http://java.sun.com/javase/6/docs/api/java/awt/geom/CubicCurve2D.Float.html#CubicCurve2D.Float()

It says "a CubicCurve with coordinates (0, 0, 0, 0, 0, 0)" but I believe there should be 8 parameters for the constructor.
Another one found in the same package.

http://java.sun.com/j2se/1.5.0/docs/api/java/awt/geom/RoundRectangle2D.Double.html#RoundRectangle2D.Double()
http://java.sun.com/j2se/1.5.0/docs/api/java/awt/geom/RoundRectangle2D.Float.html#RoundRectangle2D.Float()

Looks like "location (0.0, 0)" should be "location (0.0, 0.0)".