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1.4 The Java 2D^TM API Packages

The Java 2D API classes are organized into the following packages:

• java.awt
• java.awt.geom
• java.awt.font
• java.awt.color
• java.awt.image
• java.awt.image.renderable
• java.awt.print

Package java.awt contains those Java 2D API classes and interfaces that are general in nature or that enhance legacy classes. (Obviously, not all of the classes in java.awt are Java 2D classes.)

AlphaComposite	BasicStroke	Color
Composite	CompositeContext	Font
GradientPaint	Graphics2D	GraphicsConfiguration
GraphicsDevice	GraphicsEnvironment	Paint
PaintContext	Rectangle	Shape
Stroke	TexturePaint	Transparency

Package java.awt.geom contains classes and interfaces related to the definition of geometric primitives:

AffineTransform	Arc2D	Arc2D.Double
Arc2D.Float	Area	CubicCurve2D
CubicCurve2D.Double	CubicCurve2D.Float	Dimension2D
Ellipse2D	Ellipse2D.Double	Ellipse2D.Float
FlatteningPathIterator	GeneralPath	Line2D
Line2D.Double	Line2D.Float	PathIterator
Point2D	Point2D.Double	Point2D.Float
QuadCurve2D	QuadCurve2D.Double	QuadCurve2D.Float
Rectangle2D	Rectangle2D.Double	Rectangle2D.Float
RectangularShape	RoundRectangle2D	RoundRectangle2D.Double
RoundRectangle2D.Float

Many of the geometric primitives have corresponding .Float and .Double implementations. This was done to enable both floating single- and double-precision implementations. Double-precision implementations provide greater rendering precision at the expense of performance on some platforms.

Package java.awt.font contains classes and interfaces used for text layout and the definition of fonts:

FontRenderContext	GlyphJustificationInfo	GlyphMetrics
GlyphVector	GraphicAttribute	ImageGraphicAttribute
LineBreakMeasurer	LineMetrics	MultipleMaster
OpenType	ShapeGrapicAttribute	TextAttribute
TextHitInfo	TextLayout	TransformAttribute

Packagejava.awt.color contains classes and interfaces for the definition of color spaces and color profiles:

ColorSpace	ICC_ColorSpace	ICC_Profile
ICC_ProfileGray	ICC_ProfileRGB

The java.awt.image and java.awt.image.renderable packages contain classes and interfaces for the definition and rendering of images:

AffineTransformOp	BandCombineOp	BandedSampleModel
BufferedImage	BufferedImageFilter	BufferedImageOp
ByteLookupTable	ColorConvertOp	ColorModel
ComponentColorModel	ComponentSampleModel	ConvolveOp
ContextualRenderedImageFactory		DataBuffer
DataBufferByte	DataBufferInt	DataBufferShort
DataBufferUShort	DirectColorModel	IndexColorModel
Kernel	LookupOp	LookupTable
MultiPixelPackedSampleModel	PackedColorModel	ParameterBlock
PixelInterleavedSampleModel	Raster	RasterOp
RenderableImage	RenderableImageOp	RenderableImageProducer
RenderContext	RenderedImageFactory	RenderedImage
RescaleOp	SampleModel	ShortLookupTable
SinglePixelPackedSampleModel		TileObserver
WritableRaster	WritableRenderedImage

Package java.awt.image was present in earlier versions of the AWT. The Java 2D API enhances the following legacy AWT image classes:

• ColorModel
• DirectColorModel
• IndexColorModel

These color model classes remain in the java.awt.image package for backward compatibility. To maintain consistency, the new color model classes are also located in the java.awt.image package.

Package java.awt.print contains classes and interfaces that enable printing of all Java 2D-based text, graphics, and images.

Book	Pageable	PageFormat
Paper	Printable	PrinterGraphics
PrinterJob