Worker-Binaryhash
· The Binary Hash Worker performs a SHA-1 hash on the specified file and returns the hash digest as a 40 character hex-encoded string.
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 worker-binaryhash-aggregator-2.2.0-61.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.