RPCNET Java Security Toolkit
· The RPCNET Java Security Toolkit is a java library designed to handle several common
operations related with security such as expanding a ShortURL and checking if a domain is
subject to a Zone Transfer DNS query.
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 securitytoolkit-parent-1.0.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.