package Java_OOP;

// Inheritance in Java

/**

* Inheritance allows one class (child/subclass) to inherit

* the fields and methods of another class (parent/superclass).

*

* It promotes code reusability and establishes an "is-a" relationship.

*

* Syntax:

* class SubclassName extends SuperclassName { ... }

*

* Types of Inheritance in Java:

* - Single Inheritance (one class inherits from another)

* - Multilevel Inheritance (a class inherits from another derived class)

* - Hierarchical Inheritance (multiple classes inherit from one parent)

*

* Note:

* - Java does NOT support multiple inheritance with classes

* (to avoid ambiguity), but it can be achieved using interfaces.

*/

// Example 1: Single Inheritance

class Vehicle {

String brand = "Toyota";

void start() {

System.out.println("Vehicle is starting...");

}

}

class Car extends Vehicle {

int wheels = 4;

void drive() {

System.out.println("Car is driving...");

}

}

// Example 2: Multilevel Inheritance

class ElectricCar extends Car {

int batteryCapacity = 85;

void charge() {

System.out.println("Electric car is charging...");

}

}

// Example 3: Hierarchical Inheritance

class Motorcycle extends Vehicle {

void ride() {

System.out.println("Motorcycle is riding...");

}

}

public class InheritanceExample {

public static void main(String[] args) {

// --- Single Inheritance ---

System.out.println("Single Inheritance Example:");

Car myCar = new Car();

System.out.println("Brand: " + myCar.brand);

System.out.println("Wheels: " + myCar.wheels);

myCar.start(); // inherited from Vehicle

myCar.drive();

// --- Multilevel Inheritance ---

System.out.println("\nMultilevel Inheritance Example:");

ElectricCar myTesla = new ElectricCar();

System.out.println("Brand: " + myTesla.brand);

System.out.println("Battery Capacity: " + myTesla.batteryCapacity + " kWh");

myTesla.start(); // from Vehicle

myTesla.drive(); // from Car

myTesla.charge(); // from ElectricCar

// --- Hierarchical Inheritance ---

System.out.println("\nHierarchical Inheritance Example:");

Motorcycle myBike = new Motorcycle();

System.out.println("Brand: " + myBike.brand);

myBike.start();

myBike.ride();

}

}