RUN A HEADLESS JAVA SERVER

It's common for a Java server to have some kind of graphical element, be
it geocoded map generation or graphs and charts. These APIs almost
always need to run an X-server so that the Abstract Window Toolkit (AWT) code
may be used. However, running an unnecessary X-server is not good network
administration.

The solution depends on your version of Java. If you're on JDK 1.4, 
then
there's an option you may pass to put yourself on a headless server:

 -Djava.awt.headless=true

For those using JDK 1.3 and before, there's the Pure Java AWT (PJA)
Toolkit, available from eTeks. It's a headless Java server that's configured
in much the same way as the 1.4 Sun version, via a set of -D property
flags.

You'll need to download the jars, put them in your classpath, and then
set the following flags:

Dawt.toolkit=com.eteks.awt.PJAToolkit
Djava.awt.graphicsenv=com.eteks.java2d.PJAGraphicsEnvironment

With the IBM JDK, you may find you need the following properties where,
lib/pja is the location of your PJA jars:

Djava.awt.fonts=$JAVA_HOME/jre/lib/fonts
Djava2d.font.usePlatformFont=false
Duser.home=lib/pja

You can download the PJA Toolkit from eTeks' Web site.
http://www.eteks.com/pja/en/

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