All Known Implementing Classes:
CubicIterator, EllipseIterator, ArcIterator, AreaIterator, RoundRectIterator, LineIterator, PolygonPathIterator, TxIterator, RectIterator, TxIterator, Iterator, CopyIterator, QuadIterator, FlatteningPathIterator, CopyIterator
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. This interface allows these objects to retrieve the path of
their boundary a segment at a time by using 1st through 3rd order
Bézier curves, which are lines and quadratic or cubic
Bézier splines.
Multiple subpaths can be expressed by using a "MOVETO" segment to create a discontinuity in the geometry to move from the end of one subpath to the beginning of the next.
Each subpath can be closed manually by ending the last segment in the subpath on the same coordinate as the beginning "MOVETO" segment for that subpath or by using a "CLOSE" segment to append a line segment from the last point back to the first. Be aware that manually closing an outline as opposed to using a "CLOSE" segment to close the path might result in different line style decorations being used at the end points of the subpath. For example, the BasicStroke object uses a line "JOIN" decoration to connect the first and last points if a "CLOSE" segment is encountered, whereas simply ending the path on the same coordinate as the beginning coordinate results in line "CAP" decorations being used at the ends.
Jim
 GrahamField Summary  

public static final int  WIND_EVEN_ODD  The winding rule constant for specifying an evenodd rule for determining the interior of a path. The evenodd rule specifies that a point lies inside the path if a ray drawn in any direction from that point to infinity is crossed by path segments an odd number of times. 
public static final int  WIND_NON_ZERO  The winding rule constant for specifying a nonzero rule for determining the interior of a path. The nonzero rule specifies that a point lies inside the path if a ray drawn in any direction from that point to infinity is crossed by path segments a different number of times in the counterclockwise direction than the clockwise direction. 
public static final int  SEG_MOVETO  The segment type constant for a point that specifies the starting location for a new subpath. 
public static final int  SEG_LINETO  The segment type constant for a point that specifies the end point of a line to be drawn from the most recently specified point. 
public static final int  SEG_QUADTO  The segment type constant for the pair of points that specify
a quadratic parametric curve to be drawn from the most recently
specified point.
The curve is interpolated by solving the parametric control
equation in the range (t=[0..1]) using
the most recently specified (current) point (CP),
the first control point (P1),
and the final interpolated control point (P2).
The parametric control equation for this curve is:
P(t) = B(2,0)*CP + B(2,1)*P1 + B(2,2)*P2 0 <= t <= 1 B(n,m) = mth coefficient of nth degree Bernstein polynomial = C(n,m) * t^(m) * (1  t)^(nm) C(n,m) = Combinations of n things, taken m at a time = n! / (m! * (nm)!) 
public static final int  SEG_CUBICTO  The segment type constant for the set of 3 points that specify
a cubic parametric curve to be drawn from the most recently
specified point.
The curve is interpolated by solving the parametric control
equation in the range (t=[0..1]) using
the most recently specified (current) point (CP),
the first control point (P1),
the second control point (P2),
and the final interpolated control point (P3).
The parametric control equation for this curve is:
P(t) = B(3,0)*CP + B(3,1)*P1 + B(3,2)*P2 + B(3,3)*P3 0 <= t <= 1 B(n,m) = mth coefficient of nth degree Bernstein polynomial = C(n,m) * t^(m) * (1  t)^(nm) C(n,m) = Combinations of n things, taken m at a time = n! / (m! * (nm)!)This form of curve is commonly known as a Bézier curve. 
public static final int  SEG_CLOSE  The segment type constant that specifies that the preceding subpath should be closed by appending a line segment back to the point corresponding to the most recent SEG_MOVETO. 
Method from java.awt.geom.PathIterator Summary: 

currentSegment, currentSegment, getWindingRule, isDone, next 
Method from java.awt.geom.PathIterator Detail: 

public int currentSegment(float[] coords)

public int currentSegment(double[] coords)

public int getWindingRule()

public boolean isDone()

public void next()
