Runtime Suite
· A JUnit suite class that finds and filters tests based on user-defined criteria, then runs the selected tests. Also includes a class finder that finds test classes on the classpath, and filters to included or exclude test classes and methods by category.
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 runtime-suite-0.5.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.