Class Line2D.Double

java.lang.Object

java.awt.geom.Line2D

java.awt.geom.Line2D.Double

All Implemented Interfaces:: Shape, Serializable, Cloneable

Enclosing class:: Line2D

public static class Line2D.Double extends Line2D implements Serializable

A line segment specified with double coordinates.

Since:

1.2

See Also:

Nested Class Summary

Nested classes/interfaces declared in class Line2D

Line2D.Double, Line2D.Float

Modifier and Type	Class	Description
`static class`	`Line2D.Double`	A line segment specified with double coordinates.
`static class`	`Line2D.Float`	A line segment specified with float coordinates.

Field Summary

Modifier and Type	Field	Description
`double`	`x1`	The X coordinate of the start point of the line segment.
`double`	`x2`	The X coordinate of the end point of the line segment.
`double`	`y1`	The Y coordinate of the start point of the line segment.
`double`	`y2`	The Y coordinate of the end point of the line segment.

Constructor Summary

Constructor	Description
`Double()`	Constructs and initializes a Line with coordinates (0, 0) → (0, 0).
`Double(double x1, double y1, double x2, double y2)`	Constructs and initializes a `Line2D` from the specified coordinates.
`Double(Point2D p1, Point2D p2)`	Constructs and initializes a `Line2D` from the specified `Point2D` objects.

Method Summary

Modifier and Type	Method	Description
`Rectangle2D`	`getBounds2D()`	Returns a high precision and more accurate bounding box of the `Shape` than the `getBounds` method.
`Point2D`	`getP1()`	Returns the start `Point2D` of this `Line2D`.
`Point2D`	`getP2()`	Returns the end `Point2D` of this `Line2D`.
`double`	`getX1()`	Returns the X coordinate of the start point in double precision.
`double`	`getX2()`	Returns the X coordinate of the end point in double precision.
`double`	`getY1()`	Returns the Y coordinate of the start point in double precision.
`double`	`getY2()`	Returns the Y coordinate of the end point in double precision.
`void`	`setLine(double x1, double y1, double x2, double y2)`	Sets the location of the end points of this `Line2D` to the specified double coordinates.

Methods declared in class Line2D

clone, contains, contains, contains, contains, getBounds, getPathIterator, getPathIterator, intersects, intersects, intersectsLine, intersectsLine, linesIntersect, ptLineDist, ptLineDist, ptLineDist, ptLineDistSq, ptLineDistSq, ptLineDistSq, ptSegDist, ptSegDist, ptSegDist, ptSegDistSq, ptSegDistSq, ptSegDistSq, relativeCCW, relativeCCW, relativeCCW, setLine, setLine

Modifier and Type	Method	Description
`Object`	`clone()`	Creates a new object of the same class as this object.
`boolean`	`contains(double x, double y)`	Tests if a specified coordinate is inside the boundary of this `Line2D`.
`boolean`	`contains(double x, double y, double w, double h)`	Tests if the interior of this `Line2D` entirely contains the specified set of rectangular coordinates.
`boolean`	`contains(Point2D p)`	Tests if a given `Point2D` is inside the boundary of this `Line2D`.
`boolean`	`contains(Rectangle2D r)`	Tests if the interior of this `Line2D` entirely contains the specified `Rectangle2D`.
`Rectangle`	`getBounds()`	Returns an integer `Rectangle` that completely encloses the `Shape`.
`PathIterator`	`getPathIterator(AffineTransform at)`	Returns an iteration object that defines the boundary of this `Line2D`.
`PathIterator`	`getPathIterator(AffineTransform at, double flatness)`	Returns an iteration object that defines the boundary of this flattened `Line2D`.
`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.
`boolean`	`intersects(Rectangle2D r)`	Tests if the interior of the `Shape` intersects the interior of a specified `Rectangle2D`.
`boolean`	`intersectsLine(double x1, double y1, double x2, double y2)`	Tests if the line segment from `(x1,y1)` to `(x2,y2)` intersects this line segment.
`boolean`	`intersectsLine(Line2D l)`	Tests if the specified line segment intersects this line segment.
`static boolean`	`linesIntersect(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)`	Tests if the line segment from `(x1,y1)` to `(x2,y2)` intersects the line segment from `(x3,y3)` to `(x4,y4)`.
`double`	`ptLineDist(double px, double py)`	Returns the distance from a point to this line.
`static double`	`ptLineDist(double x1, double y1, double x2, double y2, double px, double py)`	Returns the distance from a point to a line.
`double`	`ptLineDist(Point2D pt)`	Returns the distance from a `Point2D` to this line.
`double`	`ptLineDistSq(double px, double py)`	Returns the square of the distance from a point to this line.
`static double`	`ptLineDistSq(double x1, double y1, double x2, double y2, double px, double py)`	Returns the square of the distance from a point to a line.
`double`	`ptLineDistSq(Point2D pt)`	Returns the square of the distance from a specified `Point2D` to this line.
`double`	`ptSegDist(double px, double py)`	Returns the distance from a point to this line segment.
`static double`	`ptSegDist(double x1, double y1, double x2, double y2, double px, double py)`	Returns the distance from a point to a line segment.
`double`	`ptSegDist(Point2D pt)`	Returns the distance from a `Point2D` to this line segment.
`double`	`ptSegDistSq(double px, double py)`	Returns the square of the distance from a point to this line segment.
`static double`	`ptSegDistSq(double x1, double y1, double x2, double y2, double px, double py)`	Returns the square of the distance from a point to a line segment.
`double`	`ptSegDistSq(Point2D pt)`	Returns the square of the distance from a `Point2D` to this line segment.
`int`	`relativeCCW(double px, double py)`	Returns an indicator of where the specified point `(px,py)` lies with respect to this line segment.
`static int`	`relativeCCW(double x1, double y1, double x2, double y2, double px, double py)`	Returns an indicator of where the specified point `(px,py)` lies with respect to the line segment from `(x1,y1)` to `(x2,y2)`.
`int`	`relativeCCW(Point2D p)`	Returns an indicator of where the specified `Point2D` lies with respect to this line segment.
`void`	`setLine(Line2D l)`	Sets the location of the end points of this `Line2D` to the same as those end points of the specified `Line2D`.
`void`	`setLine(Point2D p1, Point2D p2)`	Sets the location of the end points of this `Line2D` to the specified `Point2D` coordinates.

Methods declared in class Object

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

Modifier and Type	Method	Description
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `Object`.
`int`	`hashCode()`	Returns a hash code value for this object.
`final void`	`notify()`	Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()`	Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()`	Returns a string representation of the object.
`final void`	`wait()`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
`final void`	`wait(long timeoutMillis)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis, int nanos)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Field Details

x1

public double x1

The X coordinate of the start point of the line segment.

Since:: 1.2

y1

public double y1

The Y coordinate of the start point of the line segment.

Since:: 1.2

x2

public double x2

The X coordinate of the end point of the line segment.

Since:: 1.2

y2

public double y2

The Y coordinate of the end point of the line segment.

Since:: 1.2

Constructor Details

Double

public Double()

Constructs and initializes a Line with coordinates (0, 0) → (0, 0).

Since:: 1.2

Double

public Double(double x1, double y1, double x2, double y2)

Constructs and initializes a Line2D from the specified coordinates.

Parameters:: x1 - the X coordinate of the start point; y1 - the Y coordinate of the start point; x2 - the X coordinate of the end point; y2 - the Y coordinate of the end point
Since:: 1.2

Double

public Double(Point2D p1, Point2D p2)

Constructs and initializes a Line2D from the specified Point2D objects.

Parameters:: p1 - the start Point2D of this line segment; p2 - the end Point2D of this line segment
Since:: 1.2

Method Details

getX1

public double getX1()

Returns the X coordinate of the start point in double precision.

Specified by:: getX1 in class Line2D
Returns:: the X coordinate of the start point of this Line2D object.
Since:: 1.2

getY1

public double getY1()

Returns the Y coordinate of the start point in double precision.

Specified by:: getY1 in class Line2D
Returns:: the Y coordinate of the start point of this Line2D object.
Since:: 1.2

getP1

public Point2D getP1()

Returns the start Point2D of this Line2D.

Specified by:: getP1 in class Line2D
Returns:: the start Point2D of this Line2D.
Since:: 1.2

getX2

public double getX2()

Returns the X coordinate of the end point in double precision.

Specified by:: getX2 in class Line2D
Returns:: the X coordinate of the end point of this Line2D object.
Since:: 1.2

getY2

public double getY2()

Returns the Y coordinate of the end point in double precision.

Specified by:: getY2 in class Line2D
Returns:: the Y coordinate of the end point of this Line2D object.
Since:: 1.2

getP2

public Point2D getP2()

Returns the end Point2D of this Line2D.

Specified by:: getP2 in class Line2D
Returns:: the end Point2D of this Line2D.
Since:: 1.2

setLine

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

Sets the location of the end points of this Line2D to the specified double coordinates.

Specified by:: setLine in class Line2D
Parameters:: x1 - the X coordinate of the start point; y1 - the Y coordinate of the start point; x2 - the X coordinate of the end point; y2 - the Y coordinate of the end point
Since:: 1.2

getBounds2D

public 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:

1.2

See Also:

© 1993, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.