Tutorials : Smoothing Out Graphics Functioning Wrinkles in Linux and Unix :

Smoothing Out Graphics Functioning Wrinkles in Linux and Unix

by James You

Nowadays, more and more Java applications contain embedded visual graphical elements-things like graphs, photos, charts, and text images. Because the typical Java interpreter's default configurations use native graphic libraries to carry out actual graphic rendering, these images won't be a problem on Windows and Macintosh systems.

However, on LINUX and UNIX, many Java applications need to access the Java AWT (Abstract Window Toolkit) library to perform these graphics functions. These apps will have problems rendering the images if the Linux or Unix server isn't running an X-Server In fact, may network admins don't ever install the largely unnecessary X-server because it'ss not a best practice. So, how do you achieve a rich-graphic environment without changing your existing Unix or Linux application's code?

A Closer Look at the Problem

There are few Java open source libraries available for this purpose:

• The JCaptcha Project: an open-source Java framework for CAPTCHA definition and integration.
• The reCaptcha Project: a Java implementation.
• The SimpleCaptcha Project: a new open-source Java implementation.
• Proposal and source code for an audio based CAPTCHA: written in Java.

1. It generates good-looking captchas.
2. It requires minimal programming.
3. It usually requires minimal configuration.

• O/S: Sun Solaris 5.8 without X-Server
• Application Server: IBM WebSphere Application Server 5.1
• IDE: IBM WebSphere Application Developer 5.1
• Java JDK: Sun JDK1.4.2

This is the same rendering problem described earlier. After much research, I have found that this is the best way to integrate the SimpleCaptcha library into the Sun Solaris 5.8 Unix platform and IBM WebSphere Application 5.1 with JDK 1.4.2 environment, solving this common problem.

How to Add Java Applets to Your Site

New on the Java Boutique:

New Review:

Time Management Made Easy with the Quartz Enterprise Job Scheduler
Why not just use the Java timer API? This open source scheduling API boasts simplicity, ease-of-integration, a well-rounded feature set, and it's free!

New Applet:

Reverse Complement
Reverse Complement is a simple applet that converts DNA or RNA sequences into three useful formats.

Elsewhere on internet.com:

WebDeveloper Java
Lots of Java information on webdeveloper.com

WDVL Java
Thorough Java resource at the Web Developer's Virtual Library.

ScriptSearch Java
Hundreds of free Java code files to download.

jGuru: Your View of the Java Universe
Customizable portal with online training, FAQs, regular news updates, and tutorials.