Hi, Fabio! The moment a JVM loads a class may vary depending on the JVM implementation... But, according to Java Specification, a JVM must have already loaded a class once it is actively used. This means that, after you use a class of your interest, this class will have been loaded. Like this: | MyClass a = new MyClass(); | I hope this helps! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3996322#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...