MicroProfile Config 3.1
· The Eclipse MicroProfile Config specification provides a unified mechanism to access configuration, providing a single view of multiple sources.
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 mpConfig-3.1-23.0.0.12.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.