Apache MyFaces
· The MyFaces project is home of the first free open source JavaServer Faces
implementation as well as some useful JSF component libraries and other
convenient JSF stuff.
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 myfaces-19.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.