Nutshell Communication Library
· The Nutshell Communication Library is designed for network communication by using the messaging communication-style. It's a higher-level framework, where the application developer defines an application protocol by XML and code the corresponding messages and event handling. The library hides transport details from the developer.
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 nutshell-communicate-0.6.4.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.