AutoAnnotator
· A metaprogramming tool for automatically annotating types with validation constraints,
JPA annotations and arbitrary other annotations.
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 autoannotator-0.0.3.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.