com.apuntesdejava:jakartaee9-essentials
· This archetype allows you to create a Jakarta EE project
with the least amount of dependencies and plugins.
Includes an index.jsp file, and web.xml and persistence.xml files.
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 jakartaee9-essentials-0.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.