Part 1 — Definition

Inheritance is a mechanism in which one object acquires all the properties and behaviors of a parent object. The class that inherits is called a Subclass (or Child), and the class that is inherited from is the Superclass (or Parent). It promotes Code Reusability.

Part 2 — Syntax

class Parent { ... }
class Child extends Parent { ... }

Part 3 — Example

Problem: Create a basic Vehicle class and inherit it into a Car class.

class Vehicle {
    void honk() {
        System.out.println("Beep!");
    }
}

class Car extends Vehicle {
    String model = "Mustang";
}

public class Main {
    public static void main(String[] args) {
        Car myCar = new Car();
        myCar.honk(); // Accessing parent method
        System.out.println(myCar.model);
    }
}

Part 4 — Video

Video: Coming Soon

Part 1 — Definition

The super keyword is a reference variable which is used to refer to immediate parent class objects. It is mostly used to invoke the parent class constructor or methods when they are overridden in the child class.

Part 2 — Syntax

class Child extends Parent {
    Child() {
        super(); // Calls Parent constructor
    }
}

Part 3 — Example

Problem: Access a hidden parent variable.

class Animal {
    String color = "White";
}
class Dog extends Animal {
    String color = "Black";
    void printColor() {
        System.out.println(color); // Prints Black
        System.out.println(super.color); // Prints White
    }
}

Part 4 — Video

Video: Coming Soon