Legato Project
· Legato is a configurable, lightweight web mapping client that can be easily embedded into web pages and portals, CMS and individual web applications. Legato is implemented in JavaScript and based on the popular open source library OpenLayers.
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 legato-project-1.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.