Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class Arc2D.Double - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.awt.geom
Class Arc2D.Double

java.lang.Object
  |
  +--java.awt.geom.RectangularShape
        |
        +--java.awt.geom.Arc2D
              |
              +--java.awt.geom.Arc2D.Double

Enclosing class:: Arc2D

public static class Arc2D.Double
extends Arc2D

An arc specified in double precision,

Inner classes inherited from class java.awt.geom.Arc2D

Arc2D.Double, Arc2D.Float

Field Summary

double extent
          The angular extent of the arc in degrees.

double height
          The overall height of the full ellipse (not considering the angular extents).

double start
          The starting angle of the arc in degrees.

double width
          The overall width of the full ellipse (not considering the angular extents).

double x
          The x coordinate of the upper left corner of the arc.

double y
          The y coordinate of the upper left corner of the arc.

Fields inherited from class java.awt.geom.Arc2D

CHORD, OPEN, PIE

Constructor Summary

Arc2D.Double()
          Constructs a new OPEN arc, initialized to location (0, 0), size (0, 0), angular extents (start = 0, extent = 0).

Arc2D.Double(double x, double y, double w, double h, double start, double extent, int type)
          Constructs a new arc, initialized to the specified location, size, angular extents, and closure type.

Arc2D.Double(int type)
          Constructs a new arc, initialized to location (0, 0), size (0, 0), angular extents (start = 0, extent = 0), and the specified closure type.

Arc2D.Double(Rectangle2D ellipseBounds, double start, double extent, int type)
          Constructs a new arc, initialized to the specified location, size, angular extents, and closure type.

Method Summary

double getAngleExtent()
          Returns the angular extent of the arc.

double getAngleStart()
          Returns the starting angle of the arc.

double getHeight()
          Returns the height of the ellipse of which this arc is a partial section

double getWidth()
          Returns the width of the ellipse of which this arc is a partial section

double getX()
          Returns the x coordinate of the upper left corner of the arc.

double getY()
          Returns the y coordinate of the upper left corner of the arc.

boolean isEmpty()
          Determines whether the arc is empty.

protected Rectangle2D makeBounds(double x, double y, double w, double h)
          Returns the high-precision bounding box of the arc.

void setAngleExtent(double angExt)
          Sets the angular extent of this arc to the specified double value.

void setAngleStart(double angSt)
          Sets the starting angle of this arc to the specified double value.

void setArc(double x, double y, double w, double h, double angSt, double angExt, int closure)
          Sets the location, size, angular extents, and closure type of this arc to the specified double values.

Methods inherited from class java.awt.geom.Arc2D

contains, contains, contains, containsAngle, getArcType, getBounds2D, getEndPoint, getPathIterator, getStartPoint, intersects, setAngles, setAngles, setAngleStart, setArc, setArc, setArc, setArcByCenter, setArcByTangent, setArcType, setFrame

Methods inherited from class java.awt.geom.RectangularShape

clone, contains, getBounds, getCenterX, getCenterY, getFrame, getMaxX, getMaxY, getMinX, getMinY, getPathIterator, intersects, setFrame, setFrame, setFrameFromCenter, setFrameFromCenter, setFrameFromDiagonal, setFrameFromDiagonal

Methods inherited from class java.lang.Object

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

Field Detail

x

public double x

The x coordinate of the upper left corner of the arc.

y

public double y

The y coordinate of the upper left corner of the arc.

width

public double width

The overall width of the full ellipse (not considering the angular extents).

height

public double height

The overall height of the full ellipse (not considering the angular extents).

start

public double start

The starting angle of the arc in degrees.

extent

public double extent

The angular extent of the arc in degrees.

Constructor Detail

Arc2D.Double

public Arc2D.Double()

Constructs a new OPEN arc, initialized to location (0, 0), size (0, 0), angular extents (start = 0, extent = 0).

Arc2D.Double

public Arc2D.Double(int type)

Constructs a new arc, initialized to location (0, 0), size (0, 0), angular extents (start = 0, extent = 0), and the specified closure type.

Parameters:: type - The closure type for the arc: OPEN, CHORD, or PIE.

Arc2D.Double

public Arc2D.Double(double x,
                    double y,
                    double w,
                    double h,
                    double start,
                    double extent,
                    int type)

Constructs a new arc, initialized to the specified location, size, angular extents, and closure type.

Parameters:: x, y - The coordinates of the upper left corner of the arc. (Specified in double precision.); w - The overall width of the full ellipse of which this arc is a partial section. (Specified in double precision.); h - The overall height of the full ellipse of which this arc is a partial section. (Specified in double precision.); angSt - The starting angle of the arc in degrees. (Specified in double precision.); angExt - The angular extent of the arc in degrees. (Specified in double precision.); closure - The closure type for the arc: OPEN, CHORD, or PIE.

Arc2D.Double

public Arc2D.Double(Rectangle2D ellipseBounds,
                    double start,
                    double extent,
                    int type)

Constructs a new arc, initialized to the specified location, size, angular extents, and closure type.

Parameters:: ellipseBounds - The bounding rectangle that defines the outer boundary of the full ellipse of which this arc is a partial section.; angSt - The starting angle of the arc in degrees. (Specified in double precision.); angExt - The angular extent of the arc in degrees. (Specified in double precision.); closure - The closure type for the arc: OPEN, CHORD, or PIE.

Method Detail

getX

public double getX()

Returns the x coordinate of the upper left corner of the arc.

Overrides:: getX in class RectangularShape

Returns:: The x coordinate of arc's upper left coordinate in double precision.

getY

public double getY()

Returns the y coordinate of the upper left corner of the arc.

Overrides:: getY in class RectangularShape

Returns:: The y coordinate of arc's upper left coordinate in double precision.

getWidth

public double getWidth()

Returns the width of the ellipse of which this arc is a partial section

Overrides:: getWidth in class RectangularShape

Returns:: A double value that represents the width of the full ellipse of which this arc is a partial section.

getHeight

public double getHeight()

Returns the height of the ellipse of which this arc is a partial section

Overrides:: getHeight in class RectangularShape

Returns:: A double value that represents the height of the full ellipse of which this arc is a partial section.

getAngleStart

public double getAngleStart()

Returns the starting angle of the arc.

Overrides:: getAngleStart in class Arc2D

Returns:: A double value that represents the starting angle of the arc in degrees.

getAngleExtent

public double getAngleExtent()

Returns the angular extent of the arc.

Overrides:: getAngleExtent in class Arc2D

Returns:: A double value that represents the angular extent of the arc in degrees.

isEmpty

public boolean isEmpty()

Determines whether the arc is empty.

Overrides:: isEmpty in class RectangularShape

Returns:: true if the arc is empty, false if it not.

setArc

public void setArc(double x,
                   double y,
                   double w,
                   double h,
                   double angSt,
                   double angExt,
                   int closure)

Sets the location, size, angular extents, and closure type of this arc to the specified double values.

Overrides:: setArc in class Arc2D

Parameters:: x, y - The coordinates of the upper left corner of the arc.; w - The overall width of the full ellipse of which this arc is a partial section.; h - The overall height of the full ellipse of which this arc is a partial section.; angSt - The starting angle of the arc in degrees.; angExt - The angular extent of the arc in degrees.; closure - The closure type for the arc: OPEN, CHORD, or PIE.

setAngleStart

public void setAngleStart(double angSt)

Sets the starting angle of this arc to the specified double value.

Overrides:: setAngleStart in class Arc2D

Parameters:: angSt - The starting angle of the arc in degrees.

setAngleExtent

public void setAngleExtent(double angExt)

Sets the angular extent of this arc to the specified double value.

Overrides:: setAngleExtent in class Arc2D

Parameters:: angExt - The angular extent of the arc in degrees.

makeBounds

protected Rectangle2D makeBounds(double x,
                                 double y,
                                 double w,
                                 double h)

Returns the high-precision bounding box of the arc.

Overrides:: makeBounds in class Arc2D

Parameters:: x, y - The coordinates of the upper left corner of the arc.; w - The overall width of the full ellipse of which this arc is a partial section.; h - The overall height of the full ellipse of which this arc is a partial section.
Returns:: The bounding box as a Rectangle2D object.

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Field Summary
`double`	`extent` The angular extent of the arc in degrees.
`double`	`height` The overall height of the full ellipse (not considering the angular extents).
`double`	`start` The starting angle of the arc in degrees.
`double`	`width` The overall width of the full ellipse (not considering the angular extents).
`double`	`x` The x coordinate of the upper left corner of the arc.
`double`	`y` The y coordinate of the upper left corner of the arc.

Constructor Summary
`Arc2D.Double()` Constructs a new OPEN arc, initialized to location (0, 0), size (0, 0), angular extents (start = 0, extent = 0).
`Arc2D.Double(double x, double y, double w, double h, double start, double extent, int type)` Constructs a new arc, initialized to the specified location, size, angular extents, and closure type.
`Arc2D.Double(int type)` Constructs a new arc, initialized to location (0, 0), size (0, 0), angular extents (start = 0, extent = 0), and the specified closure type.
`Arc2D.Double(Rectangle2D ellipseBounds, double start, double extent, int type)` Constructs a new arc, initialized to the specified location, size, angular extents, and closure type.

Method Summary
`double`	`getAngleExtent()` Returns the angular extent of the arc.
`double`	`getAngleStart()` Returns the starting angle of the arc.
`double`	`getHeight()` Returns the height of the ellipse of which this arc is a partial section
`double`	`getWidth()` Returns the width of the ellipse of which this arc is a partial section
`double`	`getX()` Returns the x coordinate of the upper left corner of the arc.
`double`	`getY()` Returns the y coordinate of the upper left corner of the arc.
`boolean`	`isEmpty()` Determines whether the arc is empty.
`protected Rectangle2D`	`makeBounds(double x, double y, double w, double h)` Returns the high-precision bounding box of the arc.
`void`	`setAngleExtent(double angExt)` Sets the angular extent of this arc to the specified double value.
`void`	`setAngleStart(double angSt)` Sets the starting angle of this arc to the specified double value.
`void`	`setArc(double x, double y, double w, double h, double angSt, double angExt, int closure)` Sets the location, size, angular extents, and closure type of this arc to the specified double values.

Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class Arc2D.Double - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

java.awt.geom Class Arc2D.Double

x

y

width

height

start

extent

Arc2D.Double

Arc2D.Double

Arc2D.Double

Arc2D.Double

getX

getY

getWidth

getHeight

getAngleStart

getAngleExtent

isEmpty

setArc

setAngleStart

setAngleExtent

makeBounds

java.awt.geom
Class Arc2D.Double