Mercury
· Maven Mercury is a replacement for the Maven Artifact subsystem, and a complete replacement for the HTTP/HTTPS/DAV/DAVS portions of the existing transport.
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 mercury-1.0-alpha-6.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.