Of this abstraction. The values for getRadius() or getCircumference() in the above illustration could possibly be stored straight, or they might be calculated, it would not subject to the caller; the setters might or might not have Unintended effects; it isn't going to make any difference to the caller. Notice: https://propertyingurugram.in/developers-hike-prices-by-10-in-ncr-may-have-to-increase-the-price-again-to-absorb-rising-raw-material-cost/