上游充通大 ParisTech SHANGHAI JIAO TONG UNIVERSITY INSTITUT DES SCIENCES ET TECHNOLOGIES PARIS INSTITUTE OF TECHNOLOGY Circle A circle object will have instance variables such as center,which remembers the center point of the circle,and radius,which stores the length of the circle's radius. The draw method examines the center and radius to decide which pixels in a window should be colored. 5Circle • A Circle object will have instance variables such as center, which remembers the center point of the circle, and radius, which stores the length of the circle’s radius. • The draw method examines the center and radius to decide which pixels in a window should be colored. 5