Of this abstraction. The values for getRadius() or getCircumference() in the above mentioned instance may very well be saved specifically, or they may be calculated, it doesn't subject to your caller; the setters may or won't have Uncomfortable side effects; it doesn't make a difference towards the caller. 近年来这方面的研究开发主要是围绕结构 、 https://whitelandurbanresortgurgaon.health.blog/2025/07/08/m3m-st-andrews-at-scda-brings-exclusive-green-living-to-sector-113-gurgaon/