fuzzydb is a fuzzy matching database engine capable of providing human-like search results that make life
much easier for users of websites searching for things like cars, houses, people and jobs
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 org.fuzzydb.spring.aggregator-1.1.0.RELEASE.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.