JSON-GLib
· JSON-GLib is a library providing serialization and deserialization support for the JavaScript Object Notation (JSON) format described by RFC 4627.
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 json-glib-ndk25-shared-1.8.0-beta-1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.