Branch Android Invite SDK
· Use the Branch Invite SDK (branch.io) to provide an out-of-the-box functional 'invite feature' for apps consuming the Branch SDK that want to utilize a standard invite feature in their app.
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 library-0.1.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.