Simulator System
· Simulator is a functional tool that allows handling of different transports and their content based on predefined criteria and outputting expected results based on the situation being modeled
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 simulator-1.1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.