jforgame-parent
· jforgame is a lightweight online game framework written in Java. The project just shows some simple logic examples, and provides most of the base components for rapid game development. You only need to focus on game logic then.
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 jforgame-parent-1.0.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.