Popular Java Instructor - 70,000+ Students Chád (shod) Darby is an author, instructor and speaker in the Java development world. Chád is a contributing author to several Java books, including Professional Java E-Commerce (Wrox Press), Beginning Java Networking (Wrox Press), and XML and Web Services Unleashed (Sams Publishing). Chád has Java certifications from Oracle and IBM. He holds a B.S. in Computer Science from Carnegie Mellon University.