How Inheritance Works: An Animated Guide

Let's explore inheritance in programming, starting with its similarity to family traits.Just like how traits are passed down through a family tree, from grandparents to parents to children...Characteristics like eye color, height, and hair color are inherited through generations.In programming, we use classes to create a similar inheritance structure. Let's look at a Vehicle class as our base class.A Vehicle class contains core properties that all vehicles share: color, speed, and brand. These form the foundation for more specific vehicle types.Here's how we define these properties in code. Notice how we encapsulate these attributes within the class.Let's examine each core property in detail. These properties will be inherited by any class that extends Vehicle.The Vehicle class also provides basic methods that define common behaviors. These methods represent actions that all vehicles can perform.With these core properties and methods defined in our Vehicle class, we've created a strong foundation for inheritance.Now that we understand the Vehicle parent class, let's see how to create child classes that inherit from it.We'll create two child classes: Car and Motorcycle. Both will inherit from the Vehicle class using the extends keyword.Notice how both child classes automatically inherit the color and speed properties from the Vehicle class.Let's look at how we implement the Car class. We use the extends keyword to inherit from Vehicle, then add our own numberOfDoors property.The super keyword calls the Vehicle parent constructor, passing along the color and speed values.Similarly for the Motorcycle class, we inherit from Vehicle and add a hasHandleBars property.When we create an instance of a child class, it has access to both inherited properties and its own unique properties.Now let's explore method overriding and polymorphism in our vehicle hierarchy.Each class can have its own implementation of the startEngine method.The Vehicle class has a basic startEngine method that provides default behavior.The Car class overrides this method with its own specific implementation.Similarly, the Motorcycle class has its own unique implementation.This is where polymorphism comes in. We can treat different vehicle types uniformly while getting specific behavior.When we call startEngine, each object executes its own version of the method.Method overriding and polymorphism are widely used in real-world applications.Let's review what we've learned about method overriding and polymorphism.This concludes our exploration of inheritance, method overriding, and polymorphism.