# 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 non-sealed 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:
  - Serialized Form

## Nested Class Summary

### Nested classes/interfaces declared in class Path2D

`Path2D.Double, Path2D.Float`

## Field Summary

### Fields declared in class 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 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 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:
  - `Path2D.WIND_EVEN_ODD`
  - `Path2D.WIND_NON_ZERO`

### 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:
  - `Path2D.WIND_EVEN_ODD`
  - `Path2D.WIND_NON_ZERO`

### 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`
Since:
  10

### 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:
  - `Shape.getBounds()`

### 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:
  - `Cloneable`