nifi-cli
· It's a Quarkus CLI application developed by utilizing Apache NiFi REST APIs, all from the command line. Simplify your workflow and boost productivity with this CLI-based tool.
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 nifi-cli-1.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.