Java Foundation Classes in a Nutshell

Table 4−6: Graphics Operations of Java 2D (continued)

Operation Methods Description

Hit detection hit() Tests whether a given rectangle

(in device coordinates) intersects

the interior or outline of an

arbitrary

Shape. Uses the clip,

transfor m, and stroke attributes

when testing the outline of a

Shape.

Text drawing

drawString(),

drawGlyphVector(),

inherited methods

Java 2D defines text-drawing

methods that take

String,

java.text.AttributedCharacter-

Iterator, and java.awt.font.-

GlyphVector arguments. Text

drawing uses the clip, transform,

font, paint, and composite

attributes. Note, however, that

AttributedCharacterIterator

objects supply their own fonts.

Image drawing

drawImage(),

drawRenderableImage(),

drawRenderedImage(),

inherited methods

Java 2D defines new image-

drawing methods that draw

special types of images.

java.awt.image.BufferedImage is

the most important new type.

These methods use the clip,

transfor m, and composite

attributes.

The Coordinate System

By default, Java 2D uses the same coordinate system as AWT. The origin is in the

upper-left corner of the drawing surface. X coordinate values increase to the right,

and Y coordinate values increase as they go down. When drawing to a screen or

an off-scr een image, X and Y coordinates are measur ed in pixels. When drawing

to a printer or other high-resolution device, however, X and Y coordinates are

measur ed in points instead of pixels (and there are 72 points ...