quickstart-kotlin
· Maven archetype for generating kotlin and java mixed application project with basic libraries included in bom-common-spring-kotlin, the output is generally an executable jar.
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 quickstart-kotlin-1.0.4.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.