Java 2D API: 3 - - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

Java 2D API

3.1 Interfaces and Classes

The following tables list the key geometry interfaces and classes. Most of these interfaces and classes are part of the java.awt.geom package. Some, like Shape, are part of the java.awt package, primarily to maintain backw ard compatibility with earlier versions of the JDK software.

Interface

Description

PathIterator

Defines methods for retrieving elements from a path.

Shape
(java.awt)

Provides a common set of methods for describing and inspecting geometric path objects. Implemented by GeneralPath and other geometry classes.

Class

Description

Arc2D
Arc2D.Double
Arc2D.Float

Extends: RectangularShape
Represents an arc defined by a bounding rectangle, start angle, angular extent, and a closure type. Implemented to specify arcs in float and double precision: Arc2D.Float and Arc2D.Double.

Area

Implements: Shape, Cloneable
Represents an area geometry that supports boolean operations.

CubicCurve2D
CubicCurve2D.Double
CubicCurve2D.Float

Implements: Shape
Represents a cubic parametric curve segment in (w) coordinate space. Implemented to specify cubic curves in float and double precision: CubicCurve2D.Float and CubicCurve2D.Double.

Dimension2D

Encapsulates a width and height dimension. Abstract superclass for all objects that store a 2D dimension.

Ellipse2D
Ellipse2D.Double
Ellipse2D.Float

Extends: RectangularShape
Represents an ellipse defined by a bounding rectangle. Implemented to specify ellipses in float and double precision: Ellipse2D.Float and Ellipse2D.Double.

FlatteningPathIterator

Returns a flattened view of a PathIterator object.
Can be used to provide flattening behavior for Shapes that don't perform the interpolation calculations themselves.

GeneralPath

Implements: Shape
Represents a geometric path constructed from lines and quadratic and cubic curves.

Line2D
Line2D.Double
Line2D.Float

Implements: Shape
Represents a line segment in (x, y) coordinate space. Implemented to specify lines in float and double precision: Line2D.Float and Line2D.Double.

Point2D
Point2D.Double
Point2D.Float

A point representing a location in (x,y) coordinate space. Implemented to specify points in float and double precision: Point2D.Float and Point2D.Double.

QuadCurve2D
QuadCurve2D.Double
QuadCurve2D.Float

Implements: Shape
Represents a quadratic parametric curve segment in (x, y) coordinate space. Implemented to specify quadratic curves in float and double precision: QuadCurve2D.Float and QuadCurve2D.Double.

Rectangle2D
Rectangle2D.Double
Rectangle2D.Float

Extends: RectangularShape
Represents a rectangle defined by a location (x, y) and dimension (w x h). Implemented to specify rectangles in float and double precision: Rectangle2D.Float and Rectangle2D.Double.

RectangularShape

Implements: Shape
Provides common manipulation routines for operating on shapes that have rectangular bounds.

RoundRectangle2D
RoundRectangle2D.Double
RoundRectangle2D.Float

Extends: RectangularShape
Represents a rectangle with rounded corners defined by a location (x, y), a dimension (w x h), and the width and height of the corner arc. Implemented to specify round rectangles in float and double precision: RoundRectangle2D.Float and RoundRectangle2D.Double.

Interface	Description
`PathIterator`	Defines methods for retrieving elements from a path.
`Shape` (java.awt)	Provides a common set of methods for describing and inspecting geometric path objects. Implemented by `GeneralPath` and other geometry classes.

Class	Description
`Arc2D` `Arc2D.Double` `Arc2D.Float`	Extends: `RectangularShape` Represents an arc defined by a bounding rectangle, start angle, angular extent, and a closure type. Implemented to specify arcs in float and double precision: `Arc2D.Float` and `Arc2D.Double.`
`Area`	Implements: `Shape, Cloneable` Represents an area geometry that supports boolean operations.
`CubicCurve2D` `CubicCurve2D.Double` `CubicCurve2D.Float`	Implements: `Shape` Represents a cubic parametric curve segment in (w) coordinate space. Implemented to specify cubic curves in float and double precision: `CubicCurve2D.Float` and `CubicCurve2D.Double.`
`Dimension2D`	Encapsulates a width and height dimension. Abstract superclass for all objects that store a 2D dimension.
`Ellipse2D` `Ellipse2D.Double` `Ellipse2D.Float`	Extends: `RectangularShape` Represents an ellipse defined by a bounding rectangle. Implemented to specify ellipses in float and double precision: `Ellipse2D.Float` and `Ellipse2D.Double.`
FlatteningPathIterator	Returns a flattened view of a `PathIterator` object. Can be used to provide flattening behavior for `Shapes` that don't perform the interpolation calculations themselves.
`GeneralPath`	Implements: `Shape` Represents a geometric path constructed from lines and quadratic and cubic curves.
`Line2D` `Line2D.Double` `Line2D.Float`	Implements: `Shape` Represents a line segment in (x, y) coordinate space. Implemented to specify lines in float and double precision: `Line2D.Float` and `Line2D.Double.`
`Point2D` `Point2D.Double` `Point2D.Float`	A point representing a location in (x,y) coordinate space. Implemented to specify points in float and double precision: `Point2D.Float` and `Point2D.Double.`
`QuadCurve2D` `QuadCurve2D.Double` `QuadCurve2D.Float`	Implements: `Shape` Represents a quadratic parametric curve segment in (x, y) coordinate space. Implemented to specify quadratic curves in float and double precision: `QuadCurve2D.Float` and `QuadCurve2D.Double.`
`Rectangle2D` `Rectangle2D.Double` `Rectangle2D.Float`	Extends: `RectangularShape` Represents a rectangle defined by a location (x, y) and dimension (w x h). Implemented to specify rectangles in float and double precision: `Rectangle2D.Float` and `Rectangle2D.Double.`
`RectangularShape`	Implements: `Shape` Provides common manipulation routines for operating on shapes that have rectangular bounds.
`RoundRectangle2D` `RoundRectangle2D.Double` `RoundRectangle2D.Float`	Extends: `RectangularShape` Represents a rectangle with rounded corners defined by a location (x, y), a dimension (w x h), and the width and height of the corner arc. Implemented to specify round rectangles in float and double precision: `RoundRectangle2D.Float` and RoundRectangle2D.Double.

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