Dart Academy · Lesson

Polymorphism Through Shared Types

Program to a type, not a class.

What Polymorphism Means

Polymorphism lets one type stand in for many. You call a method on a shared type and each object responds in its own way.

Instead of naming a concrete class, you depend on a shared supertype. Your code works with anything that fits that shape.

void render(Shape s) => print(s.area());