Of the abstraction. The values for getRadius() or getCircumference() in the above mentioned case in point can be saved specifically, or they could be calculated, it does not make any difference for the caller; the setters might or might not have Uncomfortable side effects; it does not make any difference https://medium.com/@CommercialPropertyGurgaon/m3m-antalya-hills-sector-79-gurgaon-modern-luxury-project-9981672a0e18