J2SE
I a sure you have come to this article to find a solution o the maddening error: Caused by: java.lang.UnsupportedOperationException: adding retransformable transformers is not supported in this environment while calling Instrumentation.addTransformer(transformer, true).
CentOS comes with OpenJava JRE installed.
I have just started playing with JDK 7 (JDK stands for Java development kit and is suitable for Java developers, others should just download the JRE).
You have probably heard about the progressive disclosure principle of UI design.
