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Arc2D (Java SE 19 & JDK 19)

All Implemented Interfaces:

Shape, Cloneable

Direct Known Subclasses:

Arc2D.Double, Arc2D.Float

Since:

1.2

• Nested Class Summary

  Nested Classes

  static class 

  This class defines an arc specified in double precision.

  static class 

  This class defines an arc specified in float precision.

• Field Summary

  Fields

  static final int

  The closure type for an arc closed by drawing a straight line segment from the start of the arc segment to the end of the arc segment.

  static final int

  The closure type for an open arc with no path segments connecting the two ends of the arc segment.

  static final int

  The closure type for an arc closed by drawing straight line segments from the start of the arc segment to the center of the full ellipse and from that point to the end of the arc segment.

• Constructor Summary

  Constructors

  protected

  This is an abstract class that cannot be instantiated directly.

  protected

  This is an abstract class that cannot be instantiated directly.

• Method Summary

  boolean

  Determines whether or not the specified point is inside the boundary of the arc.

  boolean

  contains(double x, double y, double w, double h)

  Determines whether or not the interior of the arc entirely contains the specified rectangle.

  boolean

  Determines whether or not the interior of the arc entirely contains the specified rectangle.

  boolean

  Determines whether or not the specified angle is within the angular extents of the arc.

  boolean

  Determines whether or not the specified Object is equal to this Arc2D.

  abstract double

  Returns the angular extent of the arc.

  abstract double

  Returns the starting angle of the arc.

  int

  Returns the arc closure type of the arc:

  OPEN

  ,

  CHORD

  , or

  PIE

  .

  Returns the high-precision framing rectangle of the arc.

  Returns the ending point of the arc.

  Returns an iteration object that defines the boundary of the arc.

  Returns the starting point of the arc.

  int

  Returns the hashcode for this Arc2D.

  boolean

  intersects(double x, double y, double w, double h)

  Determines whether or not the interior of the arc intersects the interior of the specified rectangle.

  makeBounds(double x, double y, double w, double h)

  Constructs a Rectangle2D of the appropriate precision to hold the parameters calculated to be the framing rectangle of this arc.

  abstract void

  Sets the angular extent of this arc to the specified double value.

  void

  setAngles(double x1, double y1, double x2, double y2)

  Sets the starting angle and angular extent of this arc using two sets of coordinates.

  void

  Sets the starting angle and angular extent of this arc using two points.

  abstract void

  Sets the starting angle of this arc to the specified double value.

  void

  Sets the starting angle of this arc to the angle that the specified point defines relative to the center of this arc.

  abstract void

  setArc(double x, double y, double w, double h, double angSt, double angExt, int closure)

  Sets the location, size, angular extents, and closure type of this arc to the specified double values.

  void

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

  void

  Sets the location, size, angular extents, and closure type of this arc to the specified values.

  void

  Sets the location, size, angular extents, and closure type of this arc to the specified values.

  void

  setArcByCenter(double x, double y, double radius, double angSt, double angExt, int closure)

  Sets the position, bounds, angular extents, and closure type of this arc to the specified values.

  void

  Sets the position, bounds, and angular extents of this arc to the specified value.

  void

  Sets the closure type of this arc to the specified value: OPEN, CHORD, or PIE.

  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.

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

• Field Details
  • OPEN

    public static final int OPEN

    The closure type for an open arc with no path segments connecting the two ends of the arc segment.

    Since:

    1.2

    See Also:

    • Constant Field Values

  • CHORD

    public static final int CHORD

    The closure type for an arc closed by drawing a straight line segment from the start of the arc segment to the end of the arc segment.

    Since:

    1.2

    See Also:

    • Constant Field Values

  • PIE

    public static final int PIE

    The closure type for an arc closed by drawing straight line segments from the start of the arc segment to the center of the full ellipse and from that point to the end of the arc segment.

    Since:

    1.2

    See Also:

    • Constant Field Values

• Constructor Details
  • Arc2D

    protected Arc2D()

    This constructor creates an object with a default closure type of OPEN. It is provided only to enable serialization of subclasses.

    See Also:

    • Arc2D.Float
    • Arc2D.Double

  • Arc2D

    protected Arc2D(int type)

    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.

    Parameters:

    type - The closure type of this arc: OPEN, CHORD, or PIE.

    Since:

    1.2

    See Also:

    • Arc2D.Float
    • Arc2D.Double

• Method Details
  • getAngleStart

    public abstract double getAngleStart()

    Returns the starting angle of the arc.

    Returns:

    A double value that represents the starting angle of the arc in degrees.

    Since:

    1.2

    See Also:

    • setAngleStart(double)

  • getAngleExtent

    public abstract double getAngleExtent()

    Returns the angular extent of the arc.

    Returns:

    A double value that represents the angular extent of the arc in degrees.

    Since:

    1.2

    See Also:

    • setAngleExtent(double)

  • getArcType

    public int getArcType()

    Returns the arc closure type of the arc:

    OPEN

    ,

    CHORD

    , or

    PIE

    .

    Returns:

    One of the integer constant closure types defined in this class.

    Since:

    1.2

    See Also:

    • setArcType(int)

  • getStartPoint

    Returns the starting point of the arc. This point is the intersection of the ray from the center defined by the starting angle and the elliptical boundary of the arc.

    Returns:

    A Point2D object representing the x,y coordinates of the starting point of the arc.

    Since:

    1.2

  • getEndPoint

    Returns the ending point of the arc. This point is the intersection of the ray from the center defined by the starting angle plus the angular extent of the arc and the elliptical boundary of the arc.

    Returns:

    A Point2D object representing the x,y coordinates of the ending point of the arc.

    Since:

    1.2

  • setArc

    public abstract void setArc(double x, double y, double w, double h, double angSt, double angExt, int closure)

    Sets the location, size, angular extents, and closure type of this arc to the specified double values.

    Parameters:

    x - The X coordinate of the upper-left corner of the arc.

    y - The Y coordinate of the upper-left corner of the arc.

    w - The overall width of the full ellipse of which this arc is a partial section.

    h - The overall height of the full ellipse of which this arc is a partial section.

    angSt - The starting angle of the arc in degrees.

    angExt - The angular extent of the arc in degrees.

    closure - The closure type for the arc: OPEN, CHORD, or PIE.

    Since:

    1.2

  • setArc public void setArc(Point2D loc, Dimension2D size, double angSt, double angExt, int closure)

    Sets the location, size, angular extents, and closure type of this arc to the specified values.

    Parameters:

    loc - The Point2D representing the coordinates of the upper-left corner of the arc.

    size - The Dimension2D representing the width and height of the full ellipse of which this arc is a partial section.

    angSt - The starting angle of the arc in degrees.

    angExt - The angular extent of the arc in degrees.

    closure - The closure type for the arc: OPEN, CHORD, or PIE.

    Since:

    1.2

  • setArc public void setArc(Rectangle2D rect, double angSt, double angExt, int closure)

    Sets the location, size, angular extents, and closure type of this arc to the specified values.

    Parameters:

    rect - The framing rectangle that defines the outer boundary of the full ellipse of which this arc is a partial section.

    angSt - The starting angle of the arc in degrees.

    angExt - The angular extent of the arc in degrees.

    closure - The closure type for the arc: OPEN, CHORD, or PIE.

    Since:

    1.2

  • setArc public void setArc(Arc2D a)

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

    Parameters:

    a - The Arc2D to use to set the arc's values.

    Since:

    1.2

  • setArcByCenter

    public void setArcByCenter(double x, double y, double radius, double angSt, double angExt, int closure)

    Sets the position, bounds, angular extents, and closure type of this arc to the specified values. The arc is defined by a center point and a radius rather than a framing rectangle for the full ellipse.

    Parameters:

    x - The X coordinate of the center of the arc.

    y - The Y coordinate of the center of the arc.

    radius - The radius of the arc.

    angSt - The starting angle of the arc in degrees.

    angExt - The angular extent of the arc in degrees.

    closure - The closure type for the arc: OPEN, CHORD, or PIE.

    Since:

    1.2

  • setArcByTangent

    Sets the position, bounds, and angular extents of this arc to the specified value. The starting angle of the arc is tangent to the line specified by points (p1, p2), the ending angle is tangent to the line specified by points (p2, p3), and the arc has the specified radius.

    Parameters:

    p1 - The first point that defines the arc. The starting angle of the arc is tangent to the line specified by points (p1, p2).

    p2 - The second point that defines the arc. The starting angle of the arc is tangent to the line specified by points (p1, p2). The ending angle of the arc is tangent to the line specified by points (p2, p3).

    p3 - The third point that defines the arc. The ending angle of the arc is tangent to the line specified by points (p2, p3).

    radius - The radius of the arc.

    Since:

    1.2

  • setAngleStart

    public abstract void setAngleStart(double angSt)

    Sets the starting angle of this arc to the specified double value.

    Parameters:

    angSt - The starting angle of the arc in degrees.

    Since:

    1.2

    See Also:

    • getAngleStart()

  • setAngleExtent

    public abstract void setAngleExtent(double angExt)

    Sets the angular extent of this arc to the specified double value.

    Parameters:

    angExt - The angular extent of the arc in degrees.

    Since:

    1.2

    See Also:

    • getAngleExtent()

  • setAngleStart public void setAngleStart(Point2D p)

    Sets the starting angle of this arc to the angle that the specified point defines relative to the center of this arc. The angular extent of the arc will remain the same.

    Parameters:

    p - The Point2D that defines the starting angle.

    Since:

    1.2

    See Also:

    • getAngleStart()

  • setAngles

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

    Sets the starting angle and angular extent of this arc using two sets of coordinates. The first set of coordinates is used to determine the angle of the starting point relative to the arc's center. The second set of coordinates is used to determine the angle of the end point relative to the arc's center. The arc will always be non-empty and extend counterclockwise from the first point around to the second point.

    Parameters:

    x1 - The X coordinate of the arc's starting point.

    y1 - The Y coordinate of the arc's starting point.

    x2 - The X coordinate of the arc's ending point.

    y2 - The Y coordinate of the arc's ending point.

    Since:

    1.2

  • setAngles

    Sets the starting angle and angular extent of this arc using two points. The first point is used to determine the angle of the starting point relative to the arc's center. The second point is used to determine the angle of the end point relative to the arc's center. The arc will always be non-empty and extend counterclockwise from the first point around to the second point.

    Parameters:

    p1 - The Point2D that defines the arc's starting point.

    p2 - The Point2D that defines the arc's ending point.

    Since:

    1.2

  • setArcType

    public void setArcType(int type)

    Sets the closure type of this arc to the specified value: OPEN, CHORD, or PIE.

    Parameters:

    type - The integer constant that represents the closure type of this arc: OPEN, CHORD, or PIE.

    Throws:

    IllegalArgumentException - if type is not 0, 1, or 2.+

    Since:

    1.2

    See Also:

    • getArcType()

  • 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. Note that the arc

    partially inscribes

    the framing rectangle of this

    RectangularShape

    .

    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()

  • getBounds2D

    Returns the high-precision framing rectangle of the arc. The framing rectangle contains only the part of this

    Arc2D

    that is in between the starting and ending angles and contains the pie wedge, if this

    Arc2D

    has a

    PIE

    closure type.

    This method differs from the getBounds in that the getBounds method only returns the bounds of the enclosing ellipse of this Arc2D without considering the starting and ending angles of this Arc2D.

    Returns:

    the Rectangle2D that represents the arc's framing rectangle.

    Since:

    1.2

    See Also:

    • Shape.getBounds()

  • makeBounds protected abstract Rectangle2D makeBounds(double x, double y, double w, double h)

    Constructs a Rectangle2D of the appropriate precision to hold the parameters calculated to be the framing rectangle of this arc.

    Parameters:

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

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

    w - The width of the framing rectangle.

    h - The height of the framing rectangle.

    Returns:

    a Rectangle2D that is the framing rectangle of this arc.

    Since:

    1.2

  • containsAngle

    public boolean containsAngle(double angle)

    Determines whether or not the specified angle is within the angular extents of the arc.

    Parameters:

    angle - The angle to test.

    Returns:

    true if the arc contains the angle, false if the arc doesn't contain the angle.

    Since:

    1.2

  • contains

    public boolean contains(double x, double y)

    Determines whether or not the specified point is inside the boundary of the arc.

    Parameters:

    x - The X coordinate of the point to test.

    y - The Y coordinate of the point to test.

    Returns:

    true if the point lies within the bound of the arc, false if the point lies outside of the arc's bounds.

    Since:

    1.2

  • intersects

    public boolean intersects(double x, double y, double w, double h)

    Determines whether or not the interior of the arc intersects the interior of the specified rectangle.

    Parameters:

    x - The X coordinate of the rectangle's upper-left corner.

    y - The Y coordinate of the rectangle's upper-left corner.

    w - The width of the rectangle.

    h - The height of the rectangle.

    Returns:

    true if the arc intersects the rectangle, false if the arc doesn't intersect the rectangle.

    Since:

    1.2

    See Also:

    • Area

  • contains

    public boolean contains(double x, double y, double w, double h)

    Determines whether or not the interior of the arc entirely contains the specified rectangle.

    Parameters:

    x - The X coordinate of the rectangle's upper-left corner.

    y - The Y coordinate of the rectangle's upper-left corner.

    w - The width of the rectangle.

    h - The height of the rectangle.

    Returns:

    true if the arc contains the rectangle, false if the arc doesn't contain the rectangle.

    Since:

    1.2

    See Also:

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

  • contains

    Determines whether or not the interior of the arc entirely contains the specified rectangle.

    Specified by:

    contains in interface Shape

    Overrides:

    contains in class RectangularShape

    Parameters:

    r - The Rectangle2D to test.

    Returns:

    true if the arc contains the rectangle, false if the arc doesn't contain the rectangle.

    Since:

    1.2

    See Also:

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

  • getPathIterator

    Returns an iteration object that defines the boundary of the arc. This iterator is multithread safe. Arc2D guarantees that modifications to the geometry of the arc 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 the untransformed coordinates are desired.

    Returns:

    A PathIterator that defines the arc's boundary.

    Since:

    1.2

  • hashCode

    public int hashCode()

    Returns the hashcode for this Arc2D.

    Overrides:

    hashCode in class Object

    Returns:

    the hashcode for this Arc2D.

    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 Arc2D. The specified Object is equal to this Arc2D if it is an instance of Arc2D and if its location, size, arc extents and type are the same as this Arc2D.

    Overrides:

    equals in class Object

    Parameters:

    obj - an Object to be compared with this Arc2D.

    Returns:

    true if obj is an instance of Arc2D and has the same values; false otherwise.

    Since:

    1.6

    See Also:

    • Object.hashCode()
    • HashMap

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