java.awt.geom

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:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.awt.geom.Line2D

Line2D.Double, Line2D.Float

Field Summary

Fields

Modifier and Type	Field and 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

Constructors

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

Method Summary

Methods

Modifier and Type	Method and 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 inherited from class java.awt.geom.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

Methods inherited from class java.lang.Object

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

Field Detail

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 Detail

Line2D.Double

public Line2D.Double()

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

Since:

1.2

Line2D.Double

public Line2D.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

Line2D.Double

public Line2D.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 Detail

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:

Shape.getBounds()