File Kache
· Kotlin Multiplatform implementation of a persistent cache that exposes string-based API for common sourceset and Java's File-based API for JVM sourceset.
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 file-kache-js-2.0.0-rc02.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.