de.vatrasoft.vatralib:vatralib
· A simple and light-weight cross-platform game engine which allows for creating old-school 2D games,
such as Jump 'n' Runs, Real-time strategy games, and Shoot 'em ups.
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 vatralib-1.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.