java.awt.geom

Class Ellipse2D

Implemented Interfaces:
Cloneable, Shape
Known Direct Subclasses:
Ellipse2D.Double, Ellipse2D.Float

public abstract class Ellipse2D
extends RectangularShape

The Ellipse2D class describes an ellipse that is defined by a bounding rectangle.

This class is only the abstract superclass for all objects which store a 2D ellipse. The actual storage representation of the coordinates is left to the subclass.

Nested Class Summary

static class
Ellipse2D.Double
The Double class defines an ellipse specified in double precision.
static class
Ellipse2D.Float
The Float class defines an ellipse specified in float precision.

Constructor Summary

Ellipse2D()
This is an abstract class that cannot be instantiated directly.

Method Summary

boolean
contains(double x, double y)
Tests if a specified point is inside the boundary of this Ellipse2D.
boolean
contains(double x, double y, double w, double h)
Tests if the interior of this Ellipse2D entirely contains the specified rectangular area.
PathIterator
getPathIterator(AffineTransform at)
Returns an iteration object that defines the boundary of this Ellipse2D.
boolean
intersects(double x, double y, double w, double h)
Tests if the interior of this Ellipse2D intersects the interior of a specified rectangular area.

Methods inherited from class java.awt.geom.RectangularShape

clone, contains, contains, getBounds, getCenterX, getCenterY, getFrame, getHeight, getMaxX, getMaxY, getMinX, getMinY, getPathIterator, getWidth, getX, getY, intersects, isEmpty, setFrame, setFrame, setFrame, setFrameFromCenter, setFrameFromCenter, setFrameFromDiagonal, setFrameFromDiagonal

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Ellipse2D

protected Ellipse2D()
This is an abstract class that cannot be instantiated directly. Type-specific implementation subclasses are available for instantiation and provide a number of formats for storing the information necessary to satisfy the various accessor methods below.

Method Details

contains

public boolean contains(double x,
                        double y)
Tests if a specified point is inside the boundary of this Ellipse2D.
Specified by:
contains in interface Shape
Parameters:
Returns:
true if the specified point is contained in this ellipse; false otherwise.

contains

public boolean contains(double x,
                        double y,
                        double w,
                        double h)
Tests if the interior of this Ellipse2D entirely contains the specified rectangular area.
Specified by:
contains in interface Shape
Parameters:
w - the width of the specified rectangular area
h - the height of the specified rectangular area
Returns:
true if this Ellipse2D contains the specified rectangular area; false otherwise.

getPathIterator

public PathIterator getPathIterator(AffineTransform at)
Returns an iteration object that defines the boundary of this Ellipse2D. The iterator for this class is multi-threaded safe, which means that this Ellipse2D class guarantees that modifications to the geometry of this Ellipse2D object do not affect any iterations of that geometry that are already in process.
Specified by:
getPathIterator in interface Shape
Parameters:
at - an optional AffineTransform to be applied to the coordinates as they are returned in the iteration, or null if untransformed coordinates are desired
Returns:
the PathIterator object that returns the geometry of the outline of this Ellipse2D, one segment at a time.

intersects

public boolean intersects(double x,
                          double y,
                          double w,
                          double h)
Tests if the interior of this Ellipse2D intersects the interior of a specified rectangular area.
Specified by:
intersects in interface Shape
Parameters:
w - the width of the specified rectangular area
h - the height of the specified rectangluar area
Returns:
true if this Ellipse2D contains the specified rectangular area; false otherwise.