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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class Line2D.Double - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.awt.geom
Class Line2D.Double

java.lang.Object
  |
  +--java.awt.geom.Line2D
        |
        +--java.awt.geom.Line2D.Double
Enclosing class:
Line2D
public static class Line2D.Double
extends Line2D

A line segment specified with double coordinates.

Inner classes inherited from class java.awt.geom.Line2D
Line2D.Double, Line2D.Float
 
Field Summary
 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
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
 Rectangle2D getBounds2D()
          Returns the high-precision bounding box of this Line2D.
 Point2D getP1()
          Returns the starting 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 endpoints 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.

y1

public double y1
The Y coordinate of the start point of the line segment.

x2

public double x2
The X coordinate of the end point of the line segment.

y2

public double y2
The Y coordinate of the end point of the line segment.
Constructor Detail

Line2D.Double

public Line2D.Double()
Constructs and initializes a Line with coordinates (0, 0) -> (0, 0).

Line2D.Double

public Line2D.Double(double X1,
                     double Y1,
                     double X2,
                     double Y2)
Constructs and initializes a Line2D from the specified coordinates.
Parameters:
X1, Y1 - the first specified coordinate
X2, Y2 - the second specified coordinate

Line2D.Double

public Line2D.Double(Point2D p1,
                     Point2D p2)
Constructs and initializes a Line2D from the specified Point2D objects.
Parameters:
p1, p2 - the specified Point2D objects
Method Detail

getX1

public double getX1()
Returns the X coordinate of the start point in double precision.
Overrides:
getX1 in class Line2D
Returns:
the X coordinate of this Line2D object's starting point.

getY1

public double getY1()
Returns the Y coordinate of the start point in double precision.
Overrides:
getY1 in class Line2D
Returns:
the X coordinate of this Line2D object's starting point.

getP1

public Point2D getP1()
Returns the starting Point2D of this Line2D.
Overrides:
getP1 in class Line2D
Returns:
the starting Point2D of this Line2D

getX2

public double getX2()
Returns the X coordinate of the end point in double precision.
Overrides:
getX2 in class Line2D
Returns:
the X coordinate of this Line2D object's ending point.

getY2

public double getY2()
Returns the Y coordinate of the end point in double precision.
Overrides:
getY2 in class Line2D
Returns:
the Y coordinate of this Line2D object's starting point.

getP2

public Point2D getP2()
Returns the end Point2D of this Line2D.
Overrides:
getP2 in class Line2D
Returns:
the ending Point2D of this Line2D.

setLine

public void setLine(double X1,
                    double Y1,
                    double X2,
                    double Y2)
Sets the location of the endpoints of this Line2D to the specified double coordinates.
Overrides:
setLine in class Line2D
Parameters:
X1, Y1 - the first specified coordinate
X2, Y2 - the second specified coordinate

getBounds2D

public Rectangle2D getBounds2D()
Returns the high-precision bounding box of this Line2D.
Returns:
a Rectangle2D that is the high-precision bounding box of this Line2D.
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