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java.lang.Object java.awt.geom.GeneralPath
public final class GeneralPath
The GeneralPath
class represents a geometric path
constructed from straight lines, and quadratic and cubic
(Bézier) curves. It can contain multiple subpaths.
The winding rule specifies how the interior of a path is determined. There are two types of winding rules: EVEN_ODD and NON_ZERO.
An EVEN_ODD winding rule means that enclosed regions of the path alternate between interior and exterior areas as traversed from the outside of the path towards a point inside the region.
A NON_ZERO winding rule means that if a ray is drawn in any direction from a given point to infinity and the places where the path intersects the ray are examined, the point is inside of the path if and only if the number of times that the path crosses the ray from left to right does not equal the number of times that the path crosses the ray from right to left.
Field Summary  

static int 
WIND_EVEN_ODD
An evenodd winding rule for determining the interior of a path. 
static int 
WIND_NON_ZERO
A nonzero winding rule for determining the interior of a path. 
Constructor Summary  

GeneralPath ()
Constructs a new GeneralPath object. 

GeneralPath (int rule)
Constructs a new GeneralPath object with the specified
winding rule to control operations that require the interior of the
path to be defined. 

GeneralPath (int rule,
int initialCapacity)
Constructs a new GeneralPath object with the specified
winding rule and the specified initial capacity to store path
coordinates. 

GeneralPath (Shape s)
Constructs a new GeneralPath object from an arbitrary
Shape object. 
Method Summary  

void 
append (PathIterator pi,
boolean connect)
Appends the geometry of the specified PathIterator object
to the path, possibly connecting the new geometry to the existing
path segments with a line segment. 
void 
append (Shape s,
boolean connect)
Appends the geometry of the specified Shape object to the
path, possibly connecting the new geometry to the existing path
segments with a line segment. 
Object 
clone ()
Creates a new object of the same class as this object. 
void 
closePath ()
Closes the current subpath by drawing a straight line back to the coordinates of the last moveTo . 
boolean 
contains (double x,
double y)
Tests if the specified coordinates are inside the boundary of this Shape . 
boolean 
contains (double x,
double y,
double w,
double h)
Tests if the specified rectangular area is inside the boundary of this Shape . 
boolean 
contains (Point2D p)
Tests if the specified Point2D is inside the boundary
of this Shape . 
boolean 
contains (Rectangle2D r)
Tests if the specified Rectangle2D
is inside the boundary of this Shape . 
Shape 
createTransformedShape (AffineTransform at)
Returns a new transformed Shape . 
void 
curveTo (float x1,
float y1,
float x2,
float y2,
float x3,
float y3)
Adds a curved segment, defined by three new points, to the path by drawing a Bézier curve that intersects both the current coordinates and the coordinates (x3, y3), using the specified points (x1, y1) and (x2, y2) as Bézier control points. 
Rectangle 
getBounds ()
Return the bounding box of the path. 
Rectangle2D 
getBounds2D ()
Returns the bounding box of the path. 
Point2D 
getCurrentPoint ()
Returns the coordinates most recently added to the end of the path as a Point2D object. 
PathIterator 
getPathIterator (AffineTransform at)
Returns a PathIterator object that iterates along the
boundary of this Shape and provides access to the
geometry of the outline of this Shape . 
PathIterator 
getPathIterator (AffineTransform at,
double flatness)
Returns a PathIterator object that iterates along the
boundary of the flattened Shape and provides access to the
geometry of the outline of the Shape . 
int 
getWindingRule ()
Returns the fill style winding rule. 
boolean 
intersects (double x,
double y,
double w,
double h)
Tests if the interior of this Shape intersects the
interior of a specified set of rectangular coordinates. 
boolean 
intersects (Rectangle2D r)
Tests if the interior of this Shape intersects the
interior of a specified Rectangle2D . 
void 
lineTo (float x,
float y)
Adds a point to the path by drawing a straight line from the current coordinates to the new specified coordinates. 
void 
moveTo (float x,
float y)
Adds a point to the path by moving to the specified coordinates. 
void 
quadTo (float x1,
float y1,
float x2,
float y2)
Adds a curved segment, defined by two new points, to the path by drawing a Quadratic curve that intersects both the current coordinates and the coordinates (x2, y2), using the specified point (x1, y1) as a quadratic parametric control point. 
void 
reset ()
Resets the path to empty. 
void 
setWindingRule (int rule)
Sets the winding rule for this path to the specified value. 
void 
transform (AffineTransform at)
Transforms the geometry of this path using the specified AffineTransform . 
Methods inherited from class java.lang.Object 

equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait 
Field Detail 

public static final int WIND_EVEN_ODD
public static final int WIND_NON_ZERO
Constructor Detail 

public GeneralPath()
GeneralPath
object.
If an operation performed on this path requires the
interior of the path to be defined then the default NON_ZERO
winding rule is used.
WIND_NON_ZERO
public GeneralPath(int rule)
GeneralPath
object with the specified
winding rule to control operations that require the interior of the
path to be defined.
rule
 the winding ruleWIND_EVEN_ODD
,
WIND_NON_ZERO
public GeneralPath(int rule, int initialCapacity)
GeneralPath
object with the specified
winding rule and the specified initial capacity to store path
coordinates. This number is an initial guess as to how many path
segments are in the path, but the storage is expanded
as needed to store whatever path segments are added to this path.
rule
 the winding ruleinitialCapacity
 the estimate for the number of path segments
in the pathWIND_EVEN_ODD
,
WIND_NON_ZERO
public GeneralPath(Shape s)
GeneralPath
object from an arbitrary
Shape
object.
All of the initial geometry and the winding rule for this path are
taken from the specified Shape
object.
s
 the specified Shape
objectMethod Detail 

public void moveTo(float x, float y)
x, y
 the specified coordinatespublic void lineTo(float x, float y)
x, y
 the specified coordinatespublic void quadTo(float x1, float y1, float x2, float y2)
x1, y1
 the coordinates of the first quadratic control
pointx2, y2
 the coordinates of the final endpointpublic void curveTo(float x1, float y1, float x2, float y2, float x3, float y3)
x1, y1
 the coordinates of the first Béezier
control pointx2, y2
 the coordinates of the second Bézier
control pointx3, y3
 the coordinates of the final endpointpublic void closePath()
moveTo
. If the path is already
closed then this method has no effect.
public void append(Shape s, boolean connect)
Shape
object to the
path, possibly connecting the new geometry to the existing path
segments with a line segment.
If the connect
parameter is true
and the
path is not empty then any initial moveTo
in the
geometry of the appended Shape
is turned into a lineTo
segment.
If the destination coordinates of such a connecting lineTo
segment match the ending coordinates of a currently open
subpath then the segment is omitted as superfluous.
The winding rule of the specified Shape
is ignored
and the appended geometry is governed by the winding
rule specified for this path.
s
 the Shape
whose geometry is appended
to this pathconnect
 a boolean to control whether or not to turn an
initial moveTo
segment into a lineTo
segment to connect the new geometry to the existing pathpublic void append(PathIterator pi, boolean connect)
PathIterator
object
to the path, possibly connecting the new geometry to the existing
path segments with a line segment.
If the connect
parameter is true
and the
path is not empty then any initial moveTo
in the
geometry of the appended Shape
is turned into a
lineTo
segment.
If the destination coordinates of such a connecting lineTo
segment match the ending coordinates of a currently open
subpath then the segment is omitted as superfluous.
The winding rule of the specified Shape
is ignored
and the appended geometry is governed by the winding
rule specified for this path.
pi
 the PathIterator
whose geometry is appended to
this pathconnect
 a boolean to control whether or not to turn an
initial moveTo
segment into a lineTo
segment
to connect the new geometry to the existing pathpublic int getWindingRule()
WIND_EVEN_ODD
,
WIND_NON_ZERO
,
setWindingRule(int)
public void setWindingRule(int rule)
rule
 an integer representing the specified
winding rule
IllegalArgumentException
 if
rule
is not either
WIND_EVEN_ODD
or
WIND_NON_ZERO
WIND_EVEN_ODD
,
WIND_NON_ZERO
,
getWindingRule()
public Point2D getCurrentPoint()
Point2D
object.
Point2D
object containing the ending
coordinates of the path or null
if there are no points
in the path.public void reset()
public void transform(AffineTransform at)
AffineTransform
.
The geometry is transformed in place, which permanently changes the
boundary defined by this object.
at
 the AffineTransform
used to transform the areapublic Shape createTransformedShape(AffineTransform at)
Shape
.
at
 the AffineTransform
used to transform a
new Shape
.
Shape
, transformed with the specified
AffineTransform
.public Rectangle getBounds()
getBounds
in interface Shape
Rectangle
object that
bounds the current path.Shape.getBounds2D()
public Rectangle2D getBounds2D()
getBounds2D
in interface Shape
Rectangle2D
object that
bounds the current path.Shape.getBounds()
public boolean contains(double x, double y)
Shape
.
contains
in interface Shape
x, y
 the specified coordinates
true
if the specified coordinates are inside this
Shape
; false
otherwisepublic boolean contains(Point2D p)
Point2D
is inside the boundary
of this Shape
.
contains
in interface Shape
p
 the specified Point2D
true
if this Shape
contains the
specified Point2D
, false
otherwise.public boolean contains(double x, double y, double w, double h)
Shape
.
contains
in interface Shape
x, y
 the specified coordinatesw
 the width of the specified rectangular areah
 the height of the specified rectangular area
true
if this Shape
contains
the specified rectangluar area; false
otherwise.Area
,
Shape.intersects(double, double, double, double)
public boolean contains(Rectangle2D r)
Rectangle2D
is inside the boundary of this Shape
.
contains
in interface Shape
r
 a specified Rectangle2D
true
if this Shape
bounds the
specified Rectangle2D
; false
otherwise.Shape.contains(double, double, double, double)
public boolean intersects(double x, double y, double w, double h)
Shape
intersects the
interior of a specified set of rectangular coordinates.
intersects
in interface Shape
x, y
 the specified coordinatesw
 the width of the specified rectangular coordinatesh
 the height of the specified rectangular coordinates
true
if this Shape
and the
interior of the specified set of rectangular coordinates intersect
each other; false
otherwise.Area
public boolean intersects(Rectangle2D r)
Shape
intersects the
interior of a specified Rectangle2D
.
intersects
in interface Shape
r
 the specified Rectangle2D
true
if this Shape
and the interior
of the specified Rectangle2D
intersect each
other; false
otherwise.Shape.intersects(double, double, double, double)
public PathIterator getPathIterator(AffineTransform at)
PathIterator
object that iterates along the
boundary of this Shape
and provides access to the
geometry of the outline of this Shape
.
The iterator for this class is not multithreaded safe,
which means that this GeneralPath
class does not
guarantee that modifications to the geometry of this
GeneralPath
object do not affect any iterations of
that geometry that are already in process.
getPathIterator
in interface Shape
at
 an AffineTransform
PathIterator
that iterates along the
boundary of this Shape
and provides access to the
geometry of this Shape
's outlinepublic PathIterator getPathIterator(AffineTransform at, double flatness)
PathIterator
object that iterates along the
boundary of the flattened Shape
and provides access to the
geometry of the outline of the Shape
.
The iterator for this class is not multithreaded safe,
which means that this GeneralPath
class does not
guarantee that modifications to the geometry of this
GeneralPath
object do not affect any iterations of
that geometry that are already in process.
getPathIterator
in interface Shape
at
 an AffineTransform
flatness
 the maximum distance that the line segments used to
approximate the curved segments are allowed to deviate
from any point on the original curve
PathIterator
that iterates along the flattened
Shape
boundary.public Object clone()
clone
in class Object
OutOfMemoryError
 if there is not enough memory.Cloneable


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