public abstract class Ellipse2D extends RectangularShape
Ellipse2D class describes an ellipse that is defined
by a framing 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.
| Modifier and Type | Class and Description |
|---|---|
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. |
| Modifier | Constructor and Description |
|---|---|
protected |
Ellipse2D()
This is an abstract class that cannot be instantiated directly.
|
| Modifier and Type | Method and Description |
|---|---|
boolean |
contains(double x,
double y)
Tests if the specified coordinates are inside the boundary of the
Shape, as described by the
definition of insideness. |
boolean |
contains(double x,
double y,
double w,
double h)
Tests if the interior of the
Shape entirely contains
the specified rectangular area. |
boolean |
equals(Object obj)
Determines whether or not the specified
Object is
equal to this Ellipse2D. |
PathIterator |
getPathIterator(AffineTransform at)
Returns an iteration object that defines the boundary of this
Ellipse2D. |
int |
hashCode()
Returns the hashcode for this
Ellipse2D. |
boolean |
intersects(double x,
double y,
double w,
double h)
Tests if the interior of the
Shape intersects the
interior of a specified rectangular area. |
clone, contains, contains, getBounds, getCenterX, getCenterY, getFrame, getHeight, getMaxX, getMaxY, getMinX, getMinY, getPathIterator, getWidth, getX, getY, intersects, isEmpty, setFrame, setFrame, setFrame, setFrameFromCenter, setFrameFromCenter, setFrameFromDiagonal, setFrameFromDiagonalfinalize, getClass, notify, notifyAll, toString, wait, wait, waitgetBounds2Dprotected Ellipse2D()
Ellipse2D.Float,
Ellipse2D.Doublepublic boolean contains(double x,
double y)
Shape, as described by the
definition of insideness.x - the specified X coordinate to be testedy - the specified Y coordinate to be testedtrue if the specified coordinates are inside
the Shape boundary; false
otherwise.public boolean intersects(double x,
double y,
double w,
double h)
Shape intersects the
interior of a specified rectangular area.
The rectangular area is considered to intersect the Shape
if any point is contained in both the interior of the
Shape and the specified rectangular area.
The Shape.intersects() method allows a Shape
implementation to conservatively return true when:
Shape intersect, but
Shapes this method might
return true even though the rectangular area does not
intersect the Shape.
The Area class performs
more accurate computations of geometric intersection than most
Shape objects and therefore can be used if a more precise
answer is required.x - the X coordinate of the upper-left corner
of the specified rectangular areay - the Y coordinate of the upper-left corner
of the specified rectangular areaw - the width of the specified rectangular areah - the height of the specified rectangular areatrue if the interior of the Shape and
the interior of the rectangular area intersect, or are
both highly likely to intersect and intersection calculations
would be too expensive to perform; false otherwise.Areapublic boolean contains(double x,
double y,
double w,
double h)
Shape entirely contains
the specified rectangular area. All coordinates that lie inside
the rectangular area must lie within the Shape for the
entire rectangular area to be considered contained within the
Shape.
The Shape.contains() method allows a Shape
implementation to conservatively return false when:
intersect method returns true and
Shape entirely contains the rectangular area are
prohibitively expensive.
Shapes this method might
return false even though the Shape contains
the rectangular area.
The Area class performs
more accurate geometric computations than most
Shape objects and therefore can be used if a more precise
answer is required.x - the X coordinate of the upper-left corner
of the specified rectangular areay - the Y coordinate of the upper-left corner
of the specified rectangular areaw - the width of the specified rectangular areah - the height of the specified rectangular areatrue if the interior of the Shape
entirely contains the specified rectangular area;
false otherwise or, if the Shape
contains the rectangular area and the
intersects method returns true
and the containment calculations would be too expensive to
perform.Area,
Shape.intersects(double, double, double, double)public PathIterator getPathIterator(AffineTransform at)
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.at - an optional AffineTransform to be applied to
the coordinates as they are returned in the iteration, or
null if untransformed coordinates are desiredPathIterator object that returns the
geometry of the outline of this Ellipse2D,
one segment at a time.public int hashCode()
Ellipse2D.hashCode in class ObjectEllipse2D.Object.equals(java.lang.Object),
System.identityHashCode(java.lang.Object)public boolean equals(Object obj)
Object is
equal to this Ellipse2D. The specified
Object is equal to this Ellipse2D
if it is an instance of Ellipse2D and if its
location and size are the same as this Ellipse2D.equals in class Objectobj - an Object to be compared with this
Ellipse2D.true if obj is an instance
of Ellipse2D and has the same values;
false otherwise.Object.hashCode(),
HashMap Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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