The PathIterator interface provides the mechanism for objects that implement the Shape interface to return the geometry of their boundary by allowing a caller to retrieve the path of that boundary a segment at a time.
The AffineTransform class represents a 2D affine transform that performs a linear mapping from 2D coordinates to other 2D coordinates that preserves the "straightness" and "parallelness" of lines.
Arc2D is the abstract superclass for all objects that store a 2D arc defined by a framing rectangle, start angle, angular extent (length of the arc), and a closure type (OPEN, CHORD, or PIE).
The RoundRectangle2D class defines a rectangle with rounded corners defined by a location (x,y), a dimension (w x h), and the width and height of an arc with which to round the corners.
The IllegalPathStateException represents an exception that is thrown if an operation is performed on a path that is in an illegal state with respect to the particular operation being performed, such as appending a path segment to a GeneralPath without an initial moveto.
The NoninvertibleTransformException class represents an exception that is thrown if an operation is performed requiring the inverse of an AffineTransform object but the AffineTransform is in a non-invertible state.
Package java.awt.geom Description
Provides the Java 2D classes for defining and performing operations on objects related to two-dimensional geometry. Some important features of the package include:
classes for manipulating geometry, such as AffineTransform and the PathIterator interface which is implemented by all Shape objects.
classes that implement the Shape interface, such as CubicCurve2D, Ellipse2D, Line2D, Rectangle2D, and GeneralShape.
the Area class which provides mechanisms for add (union), subtract, intersect, and exclusiveOR operations on other Shape objects.
