ezy-locality-pom
· This project packages postal areas information downloaded from [geonames.org]: http://download.geonames.org/export/zip/ into a simple Java utility, which is suited for small projects to implement postcode search functionality without needing to rely on the web services provided by geonames.org.
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 ezy-locality-pom-0.3.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.