OPS4J - Pax Construct
· A series of tools to help piece together code, jars, and
bundles from different places into a single OSGi project
built and managed by Maven
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 construct-scripts.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.