JavaServer(tm) Faces Extensions
· JCP Standard compliant extensions to JavaServer Faces Technology,
including an implementation of the Avatar AJAX architecture.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window jsf-extensions-0.1.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.