rootbeer
· A tasty root checker library and sample app. We've scoured the internets for different methods of answering that age old question... Has this device got root?
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 rootbeer-lib-0.1.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.