The Fractal component model parent project
· Fractal is a modular and extensible component model that can be
used with various programming languages to design, implement,
deploy and reconfigure various systems and applications, from
operating systems to middleware platforms and to graphical user
interfaces.
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 parent-2.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.