Metrics Client Codahale Extra
· Extension to metrics-java-client which adapts the client for use in conjunction or in place of the Codahale 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 codahale-extra-parent-0.7.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.