Overview Package Class Use Source Tree Index Deprecated About
Prev Class | Next ClassFrames | No Frames
Summary: Nested | Field | Method | ConstrDetail: Nested | Field | Method | Constr

java.awt.geom

Class Ellipse2D

Implemented Interfaces:
Cloneable, Shape
Known Direct Subclasses:
Ellipse2D.Double, Ellipse2D.Float
public abstract class Ellipse2D
extends RectangularShape
Ellipse2D is the shape of an ellipse.
A drawing of an ellipse
The ellipse is defined by it's bounding box (shown in red), and is defined by the implicit curve:
(x/a)2 + (y/b)2 = 1

Since:
1.2

Nested Class Summary

static class
Ellipse2D.Double
An Ellipse2D that stores its coordinates using double primitives.
static class
Ellipse2D.Float
An Ellipse2D that stores its coordinates using float primitives.

Constructor Summary

Ellipse2D()
Ellipse2D is defined as abstract.

Method Summary

boolean
contains(double x, double y)
Determines if a point is contained within the ellipse.
boolean
contains(double x, double y, double w, double h)
Determines if a rectangle is completely contained within the ellipse.
PathIterator
getPathIterator(AffineTransform at)
Returns a PathIterator object corresponding to the ellipse.

Note: An ellipse cannot be represented exactly in PathIterator segments, the outline is thefore approximated with cubic Bezier segments.

boolean
intersects(double x, double y, double w, double h)
Determines if a rectangle intersects any part of the ellipse.

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()
Ellipse2D is defined as abstract. Implementing classes are Ellipse2D.Float and Ellipse2D.Double.

Method Details

contains

public boolean contains(double x,
                        double y)
Determines if a point is contained within the ellipse.

Specified by:
contains in interface Shape
Parameters:
x - - x coordinate of the point.
y - - y coordinate of the point.
Returns:
true if the point is within the ellipse, false otherwise.

contains

public boolean contains(double x,
                        double y,
                        double w,
                        double h)
Determines if a rectangle is completely contained within the ellipse.

Specified by:
contains in interface Shape
Parameters:
x - - x coordinate of the upper-left corner of the rectangle
y - - y coordinate of the upper-left corner of the rectangle
w - - width of the rectangle
h - - height of the rectangle
Returns:
true if the rectangle is completely contained, false otherwise.

getPathIterator

public PathIterator getPathIterator(AffineTransform at)
Returns a PathIterator object corresponding to the ellipse.

Note: An ellipse cannot be represented exactly in PathIterator segments, the outline is thefore approximated with cubic Bezier segments.

Specified by:
getPathIterator in interface Shape
Parameters:
at - an optional transform.
Returns:
A path iterator.

intersects

public boolean intersects(double x,
                          double y,
                          double w,
                          double h)
Determines if a rectangle intersects any part of the ellipse.

Specified by:
intersects in interface Shape
Parameters:
x - - x coordinate of the upper-left corner of the rectangle
y - - y coordinate of the upper-left corner of the rectangle
w - - width of the rectangle
h - - height of the rectangle
Returns:
true if the rectangle intersects the ellipse, false otherwise.
Ellipse2D.java -- represents an ellipse in 2-D space Copyright (C) 2000, 2002, 2004 Free Software Foundation This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

Overview Package Class Use Source Tree Index Deprecated About