Wikidata Query Service
· Wikidata Query Service is the Wikimedia implementation of SPARQL server, based on Blazegraph engine, to
service queries for Wikidata and other data sets.
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 parent-0.3.2.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.