Metrics Client Yammer Extras
· Extension to metrics-java-client which adapts the client for use in conjunction or in place of the Yammer metrics library.
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 yammer-extra-parent-0.4.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.