Java java.awt.geom Class RectangularShape（JDK8）

Constructor Detail

• RectangularShape

  protected RectangularShape()

  This is an abstract class that cannot be instantiated directly.

  Since:

  1.2

  See Also:

  Arc2D, Ellipse2D, Rectangle2D, RoundRectangle2D

Method Detail

• getX

  public abstract double getX()

  Returns the X coordinate of the upper-left corner of the framing rectangle in double precision.

  Returns:

  the X coordinate of the upper-left corner of the framing rectangle.

  Since:

  1.2

• getY

  public abstract double getY()

  Returns the Y coordinate of the upper-left corner of the framing rectangle in double precision.

  Returns:

  the Y coordinate of the upper-left corner of the framing rectangle.

  Since:

  1.2

• getWidth

  public abstract double getWidth()

  Returns the width of the framing rectangle in double precision.

  Returns:

  the width of the framing rectangle.

  Since:

  1.2

• getHeight

  public abstract double getHeight()

  Returns the height of the framing rectangle in double precision.

  Returns:

  the height of the framing rectangle.

  Since:

  1.2

• getMinX

  public double getMinX()

  Returns the smallest X coordinate of the framing rectangle of the Shape in double precision.

  Returns:

  the smallest X coordinate of the framing rectangle of the Shape.

  Since:

  1.2

• getMinY

  public double getMinY()

  Returns the smallest Y coordinate of the framing rectangle of the Shape in double precision.

  Returns:

  the smallest Y coordinate of the framing rectangle of the Shape.

  Since:

  1.2

• getMaxX

  public double getMaxX()

  Returns the largest X coordinate of the framing rectangle of the Shape in double precision.

  Returns:

  the largest X coordinate of the framing rectangle of the Shape.

  Since:

  1.2

• getMaxY

  public double getMaxY()

  Returns the largest Y coordinate of the framing rectangle of the Shape in double precision.

  Returns:

  the largest Y coordinate of the framing rectangle of the Shape.

  Since:

  1.2

• getCenterX

  public double getCenterX()

  Returns the X coordinate of the center of the framing rectangle of the Shape in double precision.

  Returns:

  the X coordinate of the center of the framing rectangle of the Shape.

  Since:

  1.2

• getCenterY

  public double getCenterY()

  Returns the Y coordinate of the center of the framing rectangle of the Shape in double precision.

  Returns:

  the Y coordinate of the center of the framing rectangle of the Shape.

  Since:

  1.2

• getFrame

  public Rectangle2D getFrame()

  Returns the framing Rectangle2D that defines the overall shape of this object.

  Returns:

  a Rectangle2D, specified in double coordinates.

  Since:

  1.2

  See Also:

  setFrame(double, double, double, double), setFrame(Point2D, Dimension2D), setFrame(Rectangle2D)

• isEmpty

  public abstract boolean isEmpty()

  Determines whether the RectangularShape is empty. When the RectangularShape is empty, it encloses no area.

  Returns:

  true if the RectangularShape is empty; false otherwise.

  Since:

  1.2

• setFrame

  public abstract void setFrame(double x,
                                double y,
                                double w,
                                double h)

  Sets the location and size of the framing rectangle of this Shape to the specified rectangular values.

  Parameters:

  x - the X coordinate of the upper-left corner of the specified rectangular shape

  y - the Y coordinate of the upper-left corner of the specified rectangular shape

  w - the width of the specified rectangular shape

  h - the height of the specified rectangular shape

  Since:

  1.2

  See Also:

  getFrame()

• setFrame

  public void setFrame(Point2D loc,
                       Dimension2D size)

  Sets the location and size of the framing rectangle of this Shape to the specified Point2D and Dimension2D, respectively. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

  Parameters:

  loc - the specified Point2D

  size - the specified Dimension2D

  Since:

  1.2

  See Also:

  getFrame()

• setFrame

  public void setFrame(Rectangle2D r)

  Sets the framing rectangle of this Shape to be the specified Rectangle2D. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

  Parameters:

  r - the specified Rectangle2D

  Since:

  1.2

  See Also:

  getFrame()

• setFrameFromDiagonal

  public void setFrameFromDiagonal(double x1,
                                   double y1,
                                   double x2,
                                   double y2)

  Sets the diagonal of the framing rectangle of this Shape based on the two specified coordinates. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

  Parameters:

  x1 - the X coordinate of the start point of the specified diagonal

  y1 - the Y coordinate of the start point of the specified diagonal

  x2 - the X coordinate of the end point of the specified diagonal

  y2 - the Y coordinate of the end point of the specified diagonal

  Since:

  1.2

• setFrameFromDiagonal

  public void setFrameFromDiagonal(Point2D p1,
                                   Point2D p2)

  Sets the diagonal of the framing rectangle of this Shape based on two specified Point2D objects. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

  Parameters:

  p1 - the start Point2D of the specified diagonal

  p2 - the end Point2D of the specified diagonal

  Since:

  1.2

• setFrameFromCenter

  public void setFrameFromCenter(double centerX,
                                 double centerY,
                                 double cornerX,
                                 double cornerY)

  Sets the framing rectangle of this Shape based on the specified center point coordinates and corner point coordinates. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

  Parameters:

  centerX - the X coordinate of the specified center point

  centerY - the Y coordinate of the specified center point

  cornerX - the X coordinate of the specified corner point

  cornerY - the Y coordinate of the specified corner point

  Since:

  1.2

• setFrameFromCenter

  public void setFrameFromCenter(Point2D center,
                                 Point2D corner)

  Sets the framing rectangle of this Shape based on a specified center Point2D and corner Point2D. The framing rectangle is used by the subclasses of RectangularShape to define their geometry.

  Parameters:

  center - the specified center Point2D

  corner - the specified corner Point2D

  Since:

  1.2

• contains

  public boolean contains(Point2D p)

  Tests if a specified Point2D is inside the boundary of the Shape, as described by the definition of insideness.

  Specified by:

  contains in interface Shape

  Parameters:

  p - the specified Point2D to be tested

  Returns:

  true if the specified Point2D is inside the boundary of the Shape; false otherwise.

  Since:

  1.2

• intersects

  public boolean intersects(Rectangle2D r)

  Tests if the interior of the Shape intersects the interior of a specified Rectangle2D. The Shape.intersects() method allows a Shape implementation to conservatively return true when:

  • there is a high probability that the Rectangle2D 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 Rectangle2D 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.

  Specified by:

  intersects in interface Shape

  Parameters:

  r - the specified Rectangle2D

  Returns:

  true if the interior of the Shape and the interior of the specified Rectangle2D intersect, or are both highly likely to intersect and intersection calculations would be too expensive to perform; false otherwise.

  Since:

  1.2

  See Also:

  Shape.intersects(double, double, double, double)

• contains

  public boolean contains(Rectangle2D r)

  Tests if the interior of the Shape entirely contains the specified Rectangle2D. 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 Rectangle2D are prohibitively expensive.

  This means that for some Shapes this method might return false even though the Shape contains the Rectangle2D. The Area class performs more accurate geometric computations than most Shape objects and therefore can be used if a more precise answer is required.

  Specified by:

  contains in interface Shape

  Parameters:

  r - The specified Rectangle2D

  Returns:

  true if the interior of the Shape entirely contains the Rectangle2D; false otherwise or, if the Shape contains the Rectangle2D and the intersects method returns true and the containment calculations would be too expensive to perform.

  Since:

  1.2

  See Also:

  Shape.contains(double, double, double, double)

• getBounds

  public Rectangle getBounds()

  Returns an integer Rectangle that completely encloses the Shape. Note that there is no guarantee that the returned Rectangle is the smallest bounding box that encloses the Shape, only that the Shape lies entirely within the indicated Rectangle. The returned Rectangle might also fail to completely enclose the Shape if the Shape overflows the limited range of the integer data type. The getBounds2D method generally returns a tighter bounding box due to its greater flexibility in representation.

  Note that the definition of insideness can lead to situations where points on the defining outline of the shape may not be considered contained in the returned bounds object, but only in cases where those points are also not considered contained in the original shape.

  If a point is inside the shape according to the contains(point) method, then it must be inside the returned Rectangle bounds object according to the contains(point) method of the bounds. Specifically:

  shape.contains(x,y) requires bounds.contains(x,y)

  If a point is not inside the shape, then it might still be contained in the bounds object:

  bounds.contains(x,y) does not imply shape.contains(x,y)

  Specified by:

  getBounds in interface Shape

  Returns:

  an integer Rectangle that completely encloses the Shape.

  Since:

  1.2

  See Also:

  Shape.getBounds2D()

• getPathIterator

  public PathIterator getPathIterator(AffineTransform at,
                                      double flatness)

  Returns an iterator object that iterates along the Shape object's boundary and provides access to a flattened view of the outline of the Shape object's geometry.

  Only SEG_MOVETO, SEG_LINETO, and SEG_CLOSE point types will be returned by the iterator.

  The amount of subdivision of the curved segments is controlled by the flatness parameter, which specifies the maximum distance that any point on the unflattened transformed curve can deviate from the returned flattened path segments. An optional AffineTransform can be specified so that the coordinates returned in the iteration are transformed accordingly.

  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.

  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

  Returns:

  a PathIterator object that provides access to the Shape object's flattened geometry.

  Since:

  1.2

• clone

  public Object clone()

  Creates a new object of the same class and with the same contents as this object.

  Overrides:

  clone in class Object

  Returns:

  a clone of this instance.

  Throws:

  OutOfMemoryError - if there is not enough memory.

  Since:

  1.2

  See Also:

  Cloneable