"This month, Cameron Laird and Kathyrn Soraiz sit in on a
conversation between a couple of techies named Remus and Romulus on
the subject of Xvfb. Read on and learn what Remus eventually does
-- that Java boosts the importance of this old utility...."
"There are plenty of useful tests you can run on a graphical
application without ever seeing its display: timing tests, tests
that make sure that it adjusts to different color depths and
environment parameters, tests of command-line arguments and other
external interfaces, load testing, code-coverage profiles, and so
on. Smart quality-assurance engineers certainly know about
"Even though it's an old utility, Xvfb is attracting renewed
attention from a new generation of Java programmers. Abstract
window toolkit (AWT) implementations for Unix expect to be
connected to a DISPLAY. People experimenting with image processors
written in Java are finding that they can, for example, automate
everything about an application, although they do need Xvfb or
VNC for headless work. Jason Hunter's book on Java Servlet
Programming nicely illustrates this with a discussion of
just-in-time generation of images destined for the Web. While his
footnote on DISPLAYs slightly mangles the facts, he correctly
emphasizes to readers that they need to get the X configuration
right before they can hope for results."
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