Java: Method Overriding

If a subclass alters the expected behavior of a superclass method, it can violate the principle.

The Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of a subclass without affecting the functioning of a program. Method overriding can violate this principle if the subclass method changes the behavior in a way that the superclass's contract is broken. For instance, if a `List` class has a `size()` method that returns the number of elements, and a subclass overrides it to return a fixed number, programs expecting the original behavior of `size()` would fail.