ClassIndex
· ClassIndex is an annotation processor which at compile-time generates an index of classes implementing given interface, classes annotated by given annotation or placed in a common package.
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 parent-3.13.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
