Of this abstraction. The values for getRadius() or getCircumference() in the above mentioned instance may be stored immediately, or they may be calculated, it won't make a difference into the caller; the setters could or may not have Uncomfortable side effects; it isn't going to subject for the caller. See https://propertyingurugram.in/delhi-haryana-rapidx-line-to-enter-gurgaon-from-aerocity/