Frank!Framework parent
· The Frank!Framework is an easy-to-use, stateless integration framework which allows (transactional) messages to be modified and exchanged between different systems.
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 frankframework-parent-8.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.