EE4J Project
· Eclipse Enterprise for Java (EE4J) is an open source initiative to create standard APIs,
implementations of those APIs, and technology compatibility kits for Java runtimes
that enable development, deployment, and management of server-side and cloud-native applications.
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 project-1.0.8.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.