<ul><li>The Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.</li><li>In the case of the `Square` class inheriting from the `Rectangle` class, there are problems with violating the principle.</li><li>The issue arises when the width and height of a square can be set independently, breaking the invariant that a square must always have equal sides.</li><li>To address this, a redesign of the hierarchy is proposed, introducing a `Shape` base class and implementing specific behavior in each shape class.</li></ul>

The Flaw in Square Inheriting from Rectangle

Discover more