Dart Interfaces : Interfaces and the Dart SDK

Interfaces and the Dart SDK :

• In Dart, interfaces provide a way to define a contract for classes to adhere to, without specifying how they should implement the contract. This allows for polymorphism and abstraction in Dart programs.

• Here's a basic example of how interfaces work in Dart:

    // Define an interface
    abstract class Animal {
      void makeSound();
    }
  
    // Implement the interface
    class Dog implements Animal {
      @override
      void makeSound() {
        print('Woof!');
      }
    }
  
    class Cat implements Animal {
      @override
      void makeSound() {
        print('Meow!');
      }
    }
  
    void main() {
      // Create instances of classes that implement the interface
      Animal dog = Dog();
      Animal cat = Cat();
  
      // Call the method defined in the interface
      dog.makeSound(); // Output: Woof!
      cat.makeSound(); // Output: Meow!
    }