CodeLicenseManager
· Manages project and license information in project sourcecode
and provides license text files for inclusion in builds. Supports
multiple languages and it is relatively easy to add a new
language and to make your own custom source code updater.
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 CodeLicenseManager-2.1.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.