Java Reference
In-Depth Information
developing richer GUIs through line art (also known as vector graphics—see ht-
tp:// ), text, and images.
Java 2D is implemented by various types located in the java.awt and
java.awt.image packages, and by the Java 2D-specific java.awt.color ,
java.awt.font , java.awt.geom , java.awt.image.renderable , and
java.awt.print packages.
This section introduces Java 2D by first presenting the java.awt package's
GraphicsEnvironment , GraphicsDevice ,and GraphicsConfiguration
classes. It then explores the Graphics2D class followed by Java 2D's support for
shapes and buffered images. (I don't explore text or printing, for brevity.)
GraphicsEnvironment, GraphicsDevice, and GraphicsConfiguration
Java2Dprovidesa GraphicsEnvironment classthatapplicationscanusetolearn
about their graphics environments (e.g., available font family names and graphics
devices) and perform specialized tasks (e.g., register a font or create a Graphics2D
instance for drawing into a buffered image).
Before you can use GraphicsEnvironment , you need to obtain an instance of
thisclass.Accomplishthistaskbyinvoking GraphicsEnvironment 's Graphic-
sEnvironment getLocalGraphicsEnvironment() class method to return
the platform's GraphicsEnvironment instance, as follows:
GraphicsEnvironment 's Java documentation states that the returned Graph-
icsEnvironment instance's resources might be local or located on a remote ma-
chine. For example, Linux platforms let users use Secure Shell (see ht-
tp:// ) to run GUI applications on
another machine and view the GUI on the local machine. (If you're interested in
learning more about this, check out “X Over SSH2 - A Tutorial” [ ht-
tp:// ] .)
Onceanapplicationhasa GraphicsEnvironment instance,itcancall Graph-
icsEnvironment 's String[] getAvailableFontFamilyNames() method to enumerate
font family names (such as Arial), as Listing 7-7 demonstrates.
Listing 7-7 . Enumerating font family names
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