FakeTime Parent POM
· FakeTime uses a native Java agent to replace System.currentTimeMillis() implementation with the one you can control using system properties
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 faketime-parent-0.8.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.