For immutable objects, “setFoo()” makes no sense, and “getFoo()” is redundant. For encapsulated objects, “foo” doesn’t need to be exposed at all, not even throu

For immutable objects, “setFoo()” makes no sense, and “getFoo()” is redundant. For encapsulated objects, “foo” doesn’t need to be exposed at all, not even through getters and setters. A group of fields with no behaviour is not an object—it’s data.