Module java.desktop
Package java.awt.geom

Class Path2D.Double

java.lang.Object
java.awt.geom.Path2D
java.awt.geom.Path2D.Double
All Implemented Interfaces:
Shape, Serializable, Cloneable
Enclosing class:
Path2D
public static class Path2D.Double extends Path2D implements Serializable
The Double class defines a geometric path with coordinates stored in double precision floating point.
Since:
1.6
See Also:

  • Nested Class Summary

    Nested classes/interfaces declared in class java.awt.geom.Path2D

    Path2D.Double, Path2D.Float

  • Field Summary

    Fields declared in class java.awt.geom.Path2D

    WIND_EVEN_ODD, WIND_NON_ZERO

  • Constructor Summary

    Constructors
    Constructor
    Description
    Double()
    Constructs a new empty double precision Path2D object with a default winding rule of Path2D.WIND_NON_ZERO.
    Double(int rule)
    Constructs a new empty double precision Path2D object with the specified winding rule to control operations that require the interior of the path to be defined.
    Double(int rule, int initialCapacity)
    Constructs a new empty double precision Path2D object with the specified winding rule and the specified initial capacity to store path segments.
    Double(Shape s)
    Constructs a new double precision Path2D object from an arbitrary Shape object.
    Double(Shape s, AffineTransform at)
    Constructs a new double precision Path2D object from an arbitrary Shape object, transformed by an AffineTransform object.

  • Method Summary

    Modifier and Type
    Method
    Description
    final void
    append(PathIterator pi, boolean connect)
    Appends the geometry of the specified PathIterator object to the path, possibly connecting the new geometry to the existing path segments with a line segment.
    final Object
    clone()
    Creates a new object of the same class as this object.
    final void
    curveTo(double x1, double y1, double x2, double y2, double x3, double y3)
    Adds a curved segment, defined by three new points, to the path by drawing a Bézier curve that intersects both the current coordinates and the specified coordinates (x3,y3), using the specified points (x1,y1) and (x2,y2) as Bézier control points.
    final Rectangle2D
    getBounds2D()
    Returns a high precision and more accurate bounding box of the Shape than the getBounds method.
    final PathIterator
    getPathIterator(AffineTransform at)
    Returns an iterator object that iterates along the Shape boundary and provides access to the geometry of the Shape outline.
    final void
    lineTo(double x, double y)
    Adds a point to the path by drawing a straight line from the current coordinates to the new specified coordinates specified in double precision.
    final void
    moveTo(double x, double y)
    Adds a point to the path by moving to the specified coordinates specified in double precision.
    final void
    quadTo(double x1, double y1, double x2, double y2)
    Adds a curved segment, defined by two new points, to the path by drawing a Quadratic curve that intersects both the current coordinates and the specified coordinates (x2,y2), using the specified point (x1,y1) as a quadratic parametric control point.
    final void
    transform(AffineTransform at)
    Transforms the geometry of this path using the specified AffineTransform.
    final void
    trimToSize()
    Trims the capacity of this Path2D instance to its current size.

    Methods declared in class java.awt.geom.Path2D

    append, closePath, contains, contains, contains, contains, contains, contains, contains, contains, createTransformedShape, getBounds, getCurrentPoint, getPathIterator, getWindingRule, intersects, intersects, intersects, intersects, reset, setWindingRule

    Methods declared in class java.lang.Object

    equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Double

      public Double()
      Constructs a new empty double precision Path2D object with a default winding rule of Path2D.WIND_NON_ZERO.
      Since:
      1.6

    • Double

      public Double(int rule)
      Constructs a new empty double precision Path2D object with the specified winding rule to control operations that require the interior of the path to be defined.
      Parameters:
      rule - the winding rule
      Throws:
      IllegalArgumentException - if rule is not either Path2D.WIND_EVEN_ODD or Path2D.WIND_NON_ZERO
      Since:
      1.6
      See Also:

    • Double

      public Double(int rule, int initialCapacity)
      Constructs a new empty double precision Path2D object with the specified winding rule and the specified initial capacity to store path segments. This number is an initial guess as to how many path segments are in the path, but the storage is expanded as needed to store whatever path segments are added to this path.
      Parameters:
      rule - the winding rule
      initialCapacity - the estimate for the number of path segments in the path
      Throws:
      IllegalArgumentException - if rule is not either Path2D.WIND_EVEN_ODD or Path2D.WIND_NON_ZERO
      NegativeArraySizeException - if initialCapacity is negative
      Since:
      1.6
      See Also:

    • Double

      public Double(Shape s)
      Constructs a new double precision Path2D object from an arbitrary Shape object. All of the initial geometry and the winding rule for this path are taken from the specified Shape object.
      Parameters:
      s - the specified Shape object
      Throws:
      NullPointerException - if s is null
      Since:
      1.6

    • Double

      public Double(Shape s, AffineTransform at)
      Constructs a new double precision Path2D object from an arbitrary Shape object, transformed by an AffineTransform object. All of the initial geometry and the winding rule for this path are taken from the specified Shape object and transformed by the specified AffineTransform object.
      Parameters:
      s - the specified Shape object
      at - the specified AffineTransform object
      Throws:
      NullPointerException - if s is null
      Since:
      1.6

  • Method Details

    • trimToSize

      public final void trimToSize()
      Description copied from class: Path2D
      Trims the capacity of this Path2D instance to its current size. An application can use this operation to minimize the storage of a path.
      Specified by:
      trimToSize in class Path2D

    • moveTo

      public final void moveTo(double x, double y)
      Adds a point to the path by moving to the specified coordinates specified in double precision.
      Specified by:
      moveTo in class Path2D
      Parameters:
      x - the specified X coordinate
      y - the specified Y coordinate
      Since:
      1.6

    • lineTo

      public final void lineTo(double x, double y)
      Adds a point to the path by drawing a straight line from the current coordinates to the new specified coordinates specified in double precision.
      Specified by:
      lineTo in class Path2D
      Parameters:
      x - the specified X coordinate
      y - the specified Y coordinate
      Since:
      1.6

    • quadTo

      public final void quadTo(double x1, double y1, double x2, double y2)
      Adds a curved segment, defined by two new points, to the path by drawing a Quadratic curve that intersects both the current coordinates and the specified coordinates (x2,y2), using the specified point (x1,y1) as a quadratic parametric control point. All coordinates are specified in double precision.
      Specified by:
      quadTo in class Path2D
      Parameters:
      x1 - the X coordinate of the quadratic control point
      y1 - the Y coordinate of the quadratic control point
      x2 - the X coordinate of the final end point
      y2 - the Y coordinate of the final end point
      Since:
      1.6

    • curveTo

      public final void curveTo(double x1, double y1, double x2, double y2, double x3, double y3)
      Adds a curved segment, defined by three new points, to the path by drawing a Bézier curve that intersects both the current coordinates and the specified coordinates (x3,y3), using the specified points (x1,y1) and (x2,y2) as Bézier control points. All coordinates are specified in double precision.
      Specified by:
      curveTo in class Path2D
      Parameters:
      x1 - the X coordinate of the first Bézier control point
      y1 - the Y coordinate of the first Bézier control point
      x2 - the X coordinate of the second Bézier control point
      y2 - the Y coordinate of the second Bézier control point
      x3 - the X coordinate of the final end point
      y3 - the Y coordinate of the final end point
      Since:
      1.6

    • append

      public final void append(PathIterator pi, boolean connect)
      Appends the geometry of the specified PathIterator object to the path, possibly connecting the new geometry to the existing path segments with a line segment. If the connect parameter is true and the path is not empty then any initial moveTo in the geometry of the appended Shape is turned into a lineTo segment. If the destination coordinates of such a connecting lineTo segment match the ending coordinates of a currently open subpath then the segment is omitted as superfluous. The winding rule of the specified Shape is ignored and the appended geometry is governed by the winding rule specified for this path.
      Specified by:
      append in class Path2D
      Parameters:
      pi - the PathIterator whose geometry is appended to this path
      connect - a boolean to control whether or not to turn an initial moveTo segment into a lineTo segment to connect the new geometry to the existing path
      Since:
      1.6

    • transform

      public final void transform(AffineTransform at)
      Transforms the geometry of this path using the specified AffineTransform. The geometry is transformed in place, which permanently changes the boundary defined by this object.
      Specified by:
      transform in class Path2D
      Parameters:
      at - the AffineTransform used to transform the area
      Since:
      1.6

    • getBounds2D

      public final 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.

      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 Rectangle2D bounds object according to the contains(point) method of the bounds. Specifically:

      shape.contains(p) requires bounds.contains(p)

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

      bounds.contains(p) does not imply shape.contains(p)

      Specified by:
      getBounds2D in interface Shape
      Returns:
      an instance of Rectangle2D that is a high-precision bounding box of the Shape.
      Since:
      1.6
      See Also:

    • getPathIterator

      public final PathIterator getPathIterator(AffineTransform at)
      Returns an iterator object that iterates along the Shape boundary and provides access to the geometry of the Shape outline. If an optional AffineTransform is specified, the coordinates returned in the iteration are transformed accordingly.

      Each call to this method returns a fresh PathIterator object that traverses the geometry of the Shape object independently from any other PathIterator objects in use at the same time.

      It is recommended, but not guaranteed, that objects implementing the Shape interface isolate iterations that are in process from any changes that might occur to the original object's geometry during such iterations.

      The iterator for this class is not multi-threaded safe, which means that the Path2D class does not guarantee that modifications to the geometry of this Path2D object do not affect any iterations of that geometry that are already in process.

      Specified by:
      getPathIterator in interface Shape
      Parameters:
      at - an AffineTransform
      Returns:
      a new PathIterator that iterates along the boundary of this Shape and provides access to the geometry of this Shape's outline
      Since:
      1.6

    • clone

      public final Object clone()
      Creates a new object of the same class as this object.
      Specified by:
      clone in class Path2D
      Returns:
      a clone of this instance.
      Throws:
      OutOfMemoryError - if there is not enough memory.
      Since:
      1.6
      See Also: