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java.awt.geom
Class Rectangle2D
java.lang.Object
java.awt.geom.RectangularShape
java.awt.geom.Rectangle2D
-
All Implemented Interfaces:
-
Shape
,
Cloneable
-
Direct Known Subclasses:
-
Rectangle
,
Rectangle2D.Double
,
Rectangle2D.Float
-
public abstract class Rectangle2D
- extends RectangularShape
The Rectangle2D class describes a rectangle defined by a location
(x,y)
(x, y)
and dimension
(w x h).
(w x h).
This class is only the abstract superclass for all objects that store a 2D rectangle. The actual storage representation of the coordinates is left to the subclass.
-
Since:
-
1.2
Nested Class Summary
|
static class |
Rectangle2D.Double
The Double class defines a rectangle specified in double coordinates. |
static class |
Rectangle2D.Float
The Float class defines a rectangle specified in float coordinates. |
Field Summary
|
static int |
OUT_BOTTOM
The bitmask that indicates that a point lies below this Rectangle2D. |
static int |
OUT_LEFT
The bitmask that indicates that a point lies to the left of this Rectangle2D. |
static int |
OUT_RIGHT
The bitmask that indicates that a point lies to the right of this Rectangle2D. |
static int |
OUT_TOP
The bitmask that indicates that a point lies above this Rectangle2D. |
Constructor Summary
|
protected |
Rectangle2D
()
This is an abstract class that cannot be instantiated directly. |
Method Summary
|
void |
add
(double newx, double newy)
Adds a point, specified by the double precision arguments newx and newy, to this Rectangle2D. |
void |
add
(
Point2D
pt)
Adds the Point2D object pt to this Rectangle2D. |
void |
add
(
Rectangle2D
r)
Adds a Rectangle2D object to this Rectangle2D. |
boolean |
contains
(double x, double y)
Tests if
the
a
specified
coordinates are
coordinate is
inside the boundary of
the Shape.
this Rectangle2D.
|
boolean |
contains
(double x, double y, double w, double h)
Tests if the interior of
the Shape
this Rectangle2D
entirely contains the specified
set of
rectangular
area.
coordinates.
|
abstract
Rectangle2D
|
createIntersection
(
Rectangle2D
r)
Returns a new Rectangle2D object representing the intersection of this Rectangle2D with the specified Rectangle2D. |
abstract
Rectangle2D
|
createUnion
(
Rectangle2D
r)
Returns a new Rectangle2D object representing the union of this Rectangle2D with the specified Rectangle2D. |
boolean |
equals
(
Object
obj)
Determines whether or not the specified Object is equal to this Rectangle2D. |
Rectangle2D
|
getBounds2D
()
Returns
a
the
high precision
and more accurate
bounding box of
the Shape than the getBounds method.
this Rectangle2D.
|
PathIterator
|
getPathIterator
(
AffineTransform
at)
Returns an iteration object that defines the boundary of this Rectangle2D. |
PathIterator
|
getPathIterator
(
AffineTransform
at, double flatness)
Returns an iteration object that defines the boundary of the flattened Rectangle2D. |
int |
hashCode
()
Returns the hashcode for this Rectangle2D. |
static void |
intersect
(
Rectangle2D
src1,
Rectangle2D
src2,
Rectangle2D
dest)
Intersects the pair of specified source Rectangle2D objects and puts the result into the specified destination Rectangle2D object. |
boolean |
intersects
(double x, double y, double w, double h)
Tests if the interior of
the Shape
this Rectangle2D
intersects the interior of a specified
set of
rectangular
area.
coordinates.
|
boolean |
intersectsLine
(double x1, double y1, double x2, double y2)
Tests if the specified line segment intersects the interior of this Rectangle2D. |
boolean |
intersectsLine
(
Line2D
l)
Tests if the specified line segment intersects the interior of this Rectangle2D. |
abstract int |
outcode
(double x, double y)
Determines where the specified coordinates lie with respect to this Rectangle2D. |
int |
outcode
(
Point2D
p)
Determines where the specified
Point2D
lies with respect to this Rectangle2D. |
void |
setFrame
(double x, double y, double w, double h)
Sets the location and size of the outer bounds of this Rectangle2D to the specified rectangular values. |
abstract void |
setRect
(double x, double y, double w, double h)
Sets the location and size of this Rectangle2D to the specified double values. |
void |
setRect
(
Rectangle2D
r)
Sets this Rectangle2D to be the same as the specified Rectangle2D. |
static void |
union
(
Rectangle2D
src1,
Rectangle2D
src2,
Rectangle2D
dest)
Unions the pair of source Rectangle2D objects and puts the result into the specified destination Rectangle2D object. |
Methods inherited from class java.awt.geom.
RectangularShape
|
clone
,
contains
,
contains
,
getBounds
,
getCenterX
,
getCenterY
,
getFrame
,
getHeight
,
getMaxX
,
getMaxY
,
getMinX
,
getMinY
,
getWidth
,
getX
,
getY
,
intersects
,
isEmpty
,
setFrame
,
setFrame
,
setFrameFromCenter
,
setFrameFromCenter
,
setFrameFromDiagonal
,
setFrameFromDiagonal
|
OUT_LEFT
public static final int OUT_LEFT
-
The bitmask that indicates that a point lies to the left of this Rectangle2D.
-
Since:
-
1.2
-
See Also:
-
Constant Field Values
OUT_TOP
public static final int OUT_TOP
-
The bitmask that indicates that a point lies above this Rectangle2D.
-
Since:
-
1.2
-
See Also:
-
Constant Field Values
OUT_RIGHT
public static final int OUT_RIGHT
-
The bitmask that indicates that a point lies to the right of this Rectangle2D.
-
Since:
-
1.2
-
See Also:
-
Constant Field Values
OUT_BOTTOM
public static final int OUT_BOTTOM
-
The bitmask that indicates that a point lies below this Rectangle2D.
-
Since:
-
1.2
-
See Also:
-
Constant Field Values
Rectangle2D
protected Rectangle2D()
-
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.
-
Since:
-
1.2
-
See Also:
-
Rectangle2D.Float
,
Rectangle2D.Double
,
Rectangle
setRect
public abstract void setRect(double x,
double y,
double w,
double h)
-
Sets the location and size of this Rectangle2D to the specified double values.
-
-
Parameters:
-
x
x, y
- the
X coordinate
coordinates to which to set the location
of the
upper-left
upper left
corner of this Rectangle2D -
y - the Y coordinate of the upper-left corner of this Rectangle2D
w - the value to use to set the width of this Rectangle2D
-
w
h
- the
width of this Rectangle2D
-
h -
value to use to set
the height of this Rectangle2D -
Since:
-
1.2
setRect
public void setRect(Rectangle2D r)
-
Sets this Rectangle2D to be the same as the specified Rectangle2D.
-
-
Parameters:
-
r - the specified Rectangle2D
-
Since:
-
1.2
intersectsLine
public boolean intersectsLine(double x1,
double y1,
double x2,
double y2)
-
Tests if the specified line segment intersects the interior of this Rectangle2D.
-
-
Parameters:
-
x1
x1, y1
- the
X coordinate
first endpoint
of the
start point of the
specified line segment -
y1 - the Y coordinate of the start point of the specified line segment
-
x2 - the X coordinate of the end point of the specified line segment
-
y2 - the Y coordinate of the end point of the specified line segment
x2, y2 - the second endpoint of the specified line segment
-
Returns:
-
true if the specified line segment intersects the interior of this Rectangle2D; false otherwise.
-
Since:
-
1.2
intersectsLine
public boolean intersectsLine(Line2D l)
-
Tests if the specified line segment intersects the interior of this Rectangle2D.
-
-
Parameters:
-
l - the specified
Line2D
to test for intersection with the interior of this Rectangle2D
-
Returns:
-
true if the specified Line2D intersects the interior of this Rectangle2D; false otherwise.
-
Since:
-
1.2
outcode
public abstract int outcode(double x,
double y)
-
Determines where the specified coordinates lie with respect to this Rectangle2D. This method computes a binary OR of the appropriate mask values indicating, for each side of this Rectangle2D, whether or not the specified coordinates are on the same side of the edge as the rest of this Rectangle2D.
-
-
Parameters:
-
x - the specified X coordinate
-
y - the specified Y coordinate
x, y - the specified coordinates
-
Returns:
-
the logical OR of all appropriate out codes.
-
Since:
-
1.2
-
See Also:
-
OUT_LEFT
,
OUT_TOP
,
OUT_RIGHT
,
OUT_BOTTOM
outcode
public int outcode(Point2D p)
-
Determines where the specified
Point2D
lies with respect to this Rectangle2D. This method computes a binary OR of the appropriate mask values indicating, for each side of this Rectangle2D, whether or not the specified Point2D is on the same side of the edge as the rest of this Rectangle2D.
-
-
Parameters:
-
p - the specified Point2D
-
Returns:
-
the logical OR of all appropriate out codes.
-
Since:
-
1.2
-
See Also:
-
OUT_LEFT
,
OUT_TOP
,
OUT_RIGHT
,
OUT_BOTTOM
setFrame
public void setFrame(double x,
double y,
double w,
double h)
-
Sets the location and size of the outer bounds of this Rectangle2D to the specified rectangular values.
-
-
Specified by:
-
setFrame
in class
RectangularShape
-
-
Parameters:
-
x - the X coordinate of the upper-left corner of this Rectangle2D
x, y - the coordinates to which to set the location of the upper left corner of the outer bounds of this Rectangle2D
-
y - the Y coordinate of the upper-left corner of this Rectangle2D
w - the value to use to set the width of the outer bounds of this Rectangle2D
-
w - the width of this Rectangle2D
-
h - the height of this Rectangle2D
h - the value to use to set the height of the outer bounds of this Rectangle2D
-
Since:
-
1.2
-
See Also:
-
RectangularShape.getFrame()
getBounds2D
public Rectangle2D getBounds2D()
-
Returns a high precision and more accurate bounding box of the Shape than the getBounds method. Note that there is no guarantee that the returned
Rectangle2D
is the smallest bounding box that encloses the Shape, only that the Shape lies entirely within the indicated Rectangle2D. The bounding box returned by this method is usually tighter than that returned by the getBounds method and never fails due to overflow problems since the return value can be an instance of the Rectangle2D that uses double precision values to store the dimensions.
Returns the high precision bounding box of this Rectangle2D.
-
-
Returns:
-
an instance of Rectangle2D that is a high-precision bounding box of the Shape.
the bounding box of this Rectangle2D.
-
Since:
-
1.2
-
See Also:
-
Shape.getBounds()
contains
public boolean contains(double x,
double y)
-
Tests if
the
a
specified
coordinates are
coordinate is
inside the boundary of
the Shape.
this Rectangle2D.
-
-
Parameters:
-
x - the specified X coordinate to be tested
-
y - the specified Y coordinate to be tested
x, y - the coordinates to test
-
Returns:
-
true if the specified coordinates are inside the
Shape boundary;
boundary of this Rectangle2D;
false otherwise. -
Since:
-
1.2
intersects
public 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. 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.
Tests if the interior of this Rectangle2D intersects the interior of a specified set of rectangular coordinates.
The Shape.intersects() method allows a Shape implementation to conservatively return true when:
-
there is a high probability that the rectangular area and the Shape intersect, but
-
the calculations to accurately determine this intersection are prohibitively expensive.
This means that for some 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.
-
-
Parameters:
-
x
x, y
- the
X coordinate
coordinates
of the
upper-left
upper left
corner of the specified
set of
rectangular
area
coordinates
-
y - the Y coordinate of the upper-left corner of the specified rectangular area
w - the width of the specified set of rectangular coordinates
-
w - the width of the specified rectangular area
-
h - the height of the specified
set of
rectangular
area
coordinates
-
Returns:
-
true 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.
true if this Rectangle2D intersects the interior of a specified set of rectangular coordinates; false otherwise.
-
Since:
-
1.2
-
See Also:
-
Area
contains
public boolean contains(double x,
double y,
double w,
double h)
-
Tests if the interior of the Shape entirely contains the specified rectangular area. All coordinates that lie inside the rectangular area must lie within the Shape for the entire rectanglar area to be considered contained within the Shape.
Tests if the interior of this Rectangle2D entirely contains the specified set of rectangular coordinates.
The Shape.contains() method allows a Shape implementation to conservatively return false when:
-
the intersect method returns true and
-
the calculations to determine whether or not the Shape entirely contains the rectangular area are prohibitively expensive.
This means that for some 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.
-
-
Parameters:
-
x
x, y
- the
X coordinate
coordinates
of the
upper-left
upper left
corner of the specified
set of
rectangular
area
coordinates
-
y - the Y coordinate of the upper-left corner of the specified rectangular area
w - the width of the specified set of rectangular coordinates
-
w - the width of the specified rectangular area
-
h - the height of the specified
set of
rectangular
area
coordinates
-
Returns:
-
true 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.
true if this Rectangle2D entirely contains specified set of rectangular coordinates; false otherwise.
-
Since:
-
1.2
-
See Also:
-
Area
,
Shape.intersects(double, double, double, double)
createIntersection
public abstract Rectangle2D createIntersection(Rectangle2D r)
-
Returns a new Rectangle2D object representing the intersection of this Rectangle2D with the specified Rectangle2D.
-
-
Parameters:
-
r - the Rectangle2D to be intersected with this Rectangle2D
-
Returns:
-
the largest Rectangle2D contained in both the specified Rectangle2D and in this Rectangle2D.
-
Since:
-
1.2
intersect
public static void intersect(Rectangle2D src1,
Rectangle2D src2,
Rectangle2D dest)
-
Intersects the pair of specified source Rectangle2D objects and puts the result into the specified destination Rectangle2D object. One of the source rectangles can also be the destination to avoid creating a third Rectangle2D object, but in this case the original points of this source rectangle will be overwritten by this method.
-
-
Parameters:
-
src1 - the first of a pair of Rectangle2D objects to be intersected with each other
-
src2 - the second of a pair of Rectangle2D objects to be intersected with each other
-
dest - the Rectangle2D that holds the results of the intersection of src1 and src2
-
Since:
-
1.2
createUnion
public abstract Rectangle2D createUnion(Rectangle2D r)
-
Returns a new Rectangle2D object representing the union of this Rectangle2D with the specified Rectangle2D.
-
-
Parameters:
-
r - the Rectangle2D to be combined with this Rectangle2D
-
Returns:
-
the smallest Rectangle2D containing both the specified Rectangle2D and this Rectangle2D.
-
Since:
-
1.2
union
public static void union(Rectangle2D src1,
Rectangle2D src2,
Rectangle2D dest)
-
Unions the pair of source Rectangle2D objects and puts the result into the specified destination Rectangle2D object. One of the source rectangles can also be the destination to avoid creating a third Rectangle2D object, but in this case the original points of this source rectangle will be overwritten by this method.
-
-
Parameters:
-
src1 - the first of a pair of Rectangle2D objects to be combined with each other
-
src2 - the second of a pair of Rectangle2D objects to be combined with each other
-
dest - the Rectangle2D that holds the results of the union of src1 and src2
-
Since:
-
1.2
add
public void add(double newx,
double newy)
-
Adds a point, specified by the double precision arguments newx and newy, to this Rectangle2D. The resulting Rectangle2D is the smallest Rectangle2D that contains both the original Rectangle2D and the specified point.
After adding a point, a call to contains with the added point as an argument does not necessarily return true. The contains method does not return true for points on the right or bottom edges of a rectangle. Therefore, if the added point falls on the left or bottom edge of the enlarged rectangle, contains returns false for that point.
-
-
Parameters:
-
newx - the X coordinate of the new point
-
newy - the Y coordinate of the new point
newx, newy - the coordinates of the new point
-
Since:
-
1.2
JDK1.0
add
public void add(Point2D pt)
-
Adds the Point2D object pt to this Rectangle2D. The resulting Rectangle2D is the smallest Rectangle2D that contains both the original Rectangle2D and the specified Point2D.
After adding a point, a call to contains with the added point as an argument does not necessarily return true. The contains method does not return true for points on the right or bottom edges of a rectangle. Therefore, if the added point falls on the left or bottom edge of the enlarged rectangle, contains returns false for that point.
-
-
Parameters:
-
pt - the new Point2D to add to this Rectangle2D.
-
Since:
-
1.2
JDK1.0
add
public void add(Rectangle2D r)
-
Adds a Rectangle2D object to this Rectangle2D. The resulting Rectangle2D is the union of the two Rectangle2D objects.
-
-
Parameters:
-
r - the Rectangle2D to add to this Rectangle2D.
-
Since:
-
1.2
JDK1.0
getPathIterator
public PathIterator getPathIterator(AffineTransform at)
-
Returns an iteration object that defines the boundary of this Rectangle2D. The iterator for this class is multi-threaded safe, which means that this Rectangle2D class guarantees that modifications to the geometry of this Rectangle2D object do not affect any iterations of that geometry that are already in process.
-
-
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 Rectangle2D, one segment at a time.
-
Since:
-
1.2
getPathIterator
public PathIterator getPathIterator(AffineTransform at,
double flatness)
-
Returns an iteration object that defines the boundary of the flattened Rectangle2D. Since rectangles are already flat, the flatness parameter is ignored. The iterator for this class is multi-threaded safe, which means that this Rectangle2D class guarantees that modifications to the geometry of this Rectangle2D object do not affect any iterations of that geometry that are already in process.
-
-
Specified by:
-
getPathIterator
in interface
Shape
-
Overrides:
-
getPathIterator
in class
RectangularShape
-
-
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
-
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. Since rectangles are already flat, the flatness parameter is ignored.
-
Returns:
-
the PathIterator object that returns the geometry of the outline of this Rectangle2D, one segment at a time.
-
Since:
-
1.2
hashCode
public int hashCode()
-
Returns the hashcode for this Rectangle2D.
-
-
Overrides:
-
hashCode
in class
Object
-
-
Returns:
-
the hashcode for this Rectangle2D.
-
Since:
-
1.2
-
See Also:
-
Object.equals(java.lang.Object)
,
Hashtable
equals
public boolean equals(Object obj)
-
Determines whether or not the specified Object is equal to this Rectangle2D. The specified Object is equal to this Rectangle2D if it is an instance of Rectangle2D and if its location and size are the same as this Rectangle2D.
-
-
Overrides:
-
equals
in class
Object
-
-
Parameters:
-
obj - an Object to be compared with this Rectangle2D.
-
Returns:
-
true if obj is an instance of Rectangle2D and has the same values; false otherwise.
-
Since:
-
1.2
-
See Also:
-
Object.hashCode()
,
Hashtable