madura-perspectives-manager
· Perspectives, in this case, are snap-in applications that plug into the main application and share the login information, locale etc of the
surrounding application. That means the subapplications don't have to worry about those issues and can be simpler. It also means you can
construct a semi-dynamic workspace with plugged in apps that share a common look and feel (another thing that is set globally) and can even communicate with each other.
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 madura-perspectives-manager-3.4.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.