Jeff Friesen is a freelance tutor and software developer with an emphasis on Java (and now Android). In addition to authoring Learn Java for Android Development and co-authoring Android Recipes -- Jeff has written numerous articles on Java and other technologies for JavaWorld (a href="http: //www.JavaWorld.com"JavaWorld.com/a), informIT (a href="http: //www.InformIT.com"InformIT.com/a), a href="http: //www.java.net"Java.net/a, and DevSource (a href="http: //www.DevSource.com"DevSource.com/a). Jeff can be contacted via his website at a href="http: //www.tutortutor.ca"TutorTutor.ca/a.