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Showing content from https://docs.oracle.com/en/java/javase/19/docs/api/java.desktop/java/awt/geom/RoundRectangle2D.html below:

RoundRectangle2D (Java SE 19 & JDK 19)

All Implemented Interfaces:

Shape, Cloneable

Direct Known Subclasses:

RoundRectangle2D.Double, RoundRectangle2D.Float

The

class defines a rectangle with rounded corners defined by a location

, a dimension

, and the width and height of an arc with which to round the corners.

This class is the abstract superclass for all objects that store a 2D rounded rectangle. The actual storage representation of the coordinates is left to the subclass.

Since:

1.2

• Nested Class Summary

  Nested Classes

  static class 

  The Double class defines a rectangle with rounded corners all specified in double coordinates.

  static class 

  The Float class defines a rectangle with rounded corners all specified in float coordinates.

• Constructor Summary

  Constructors

  protected

  This is an abstract class that cannot be instantiated directly.

• Method Summary

  boolean

  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

  Determines whether or not the specified Object is equal to this RoundRectangle2D.

  abstract double

  Gets the height of the arc that rounds off the corners.

  abstract double

  Gets the width of the arc that rounds off the corners.

  Returns an iteration object that defines the boundary of this RoundRectangle2D.

  int

  Returns the hashcode for this RoundRectangle2D.

  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.

  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.

  abstract void

  setRoundRect(double x, double y, double w, double h, double arcWidth, double arcHeight)

  Sets the location, size, and corner radii of this RoundRectangle2D to the specified double values.

  void

  Sets this RoundRectangle2D to be the same as the specified RoundRectangle2D.

  Methods declared in class java.awt.geom.RectangularShapeclone, contains, contains, getBounds, getCenterX, getCenterY, getFrame, getHeight, getMaxX, getMaxY, getMinX, getMinY, getPathIterator, getWidth, getX, getY, intersects, isEmpty, setFrame, setFrame, setFrameFromCenter, setFrameFromCenter, setFrameFromDiagonal, setFrameFromDiagonal

• Constructor Details
  • RoundRectangle2D

    protected RoundRectangle2D()

    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:

    • RoundRectangle2D.Float
    • RoundRectangle2D.Double

• Method Details
  • getArcWidth

    public abstract double getArcWidth()

    Gets the width of the arc that rounds off the corners.

    Returns:

    the width of the arc that rounds off the corners of this RoundRectangle2D.

    Since:

    1.2

  • getArcHeight

    public abstract double getArcHeight()

    Gets the height of the arc that rounds off the corners.

    Returns:

    the height of the arc that rounds off the corners of this RoundRectangle2D.

    Since:

    1.2

  • setRoundRect

    public abstract void setRoundRect(double x, double y, double w, double h, double arcWidth, double arcHeight)

    Sets the location, size, and corner radii of this RoundRectangle2D to the specified double values.

    Parameters:

    x - the X coordinate to which to set the location of this RoundRectangle2D

    y - the Y coordinate to which to set the location of this RoundRectangle2D

    w - the width to which to set this RoundRectangle2D

    h - the height to which to set this RoundRectangle2D

    arcWidth - the width to which to set the arc of this RoundRectangle2D

    arcHeight - the height to which to set the arc of this RoundRectangle2D

    Since:

    1.2

  • setRoundRect

    Sets this RoundRectangle2D to be the same as the specified RoundRectangle2D.

    Parameters:

    rr - the specified RoundRectangle2D

    Since:

    1.2

  • setFrame

    public 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.

    Specified by:

    setFrame in class RectangularShape

    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:

    • RectangularShape.getFrame()

  • contains

    public 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

    .

    Parameters:

    x - the specified X coordinate to be tested

    y - the specified Y coordinate to be tested

    Returns:

    true if the specified coordinates are inside the Shape boundary; 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.

    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 - the X coordinate of the upper-left corner of the specified rectangular area

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

    w - the width of the specified rectangular area

    h - the height of the specified rectangular area

    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.

    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 rectangular area to be considered contained within the

    Shape

    .

    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 - the X coordinate of the upper-left corner of the specified rectangular area

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

    w - the width of the specified rectangular area

    h - the height of the specified rectangular area

    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.

    Since:

    1.2

    See Also:

    • Area
    • Shape.intersects(double, double, double, double)

  • getPathIterator

    Returns an iteration object that defines the boundary of this RoundRectangle2D. The iterator for this class is multi-threaded safe, which means that this RoundRectangle2D class guarantees that modifications to the geometry of this RoundRectangle2D 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 RoundRectangle2D, one segment at a time.

    Since:

    1.2

  • hashCode

    public int hashCode()

    Returns the hashcode for this RoundRectangle2D.

    Overrides:

    hashCode in class Object

    Returns:

    the hashcode for this RoundRectangle2D.

    Since:

    1.6

    See Also:

    • Object.equals(java.lang.Object)
    • System.identityHashCode(java.lang.Object)

  • equals public boolean equals(Object obj)

    Determines whether or not the specified Object is equal to this RoundRectangle2D. The specified Object is equal to this RoundRectangle2D if it is an instance of RoundRectangle2D and if its location, size, and corner arc dimensions are the same as this RoundRectangle2D.

    Overrides:

    equals in class Object

    Parameters:

    obj - an Object to be compared with this RoundRectangle2D.

    Returns:

    true if obj is an instance of RoundRectangle2D and has the same values; false otherwise.

    Since:

    1.6

    See Also:

    • Object.hashCode()
    • HashMap

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