Java java.awt.geom Class Line2D.Double（JDK8）

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

• 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 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()