Microsoft Project Oxford Face Client Library
· This client library allows the use of Microsoft's state-of-the-art cloud-based face algorithms to detect and recognize human faces in images. See https://github.com/Microsoft/Cognitive-Face-Android for more information.
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 face-1.4.4.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.