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Liskov_Substitution_Principle.java
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Liskov_Substitution_Principle.java
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/*
______________________________________________________________________________________________________________________________________________________
Title: Demonstrating the Liskov Substitution Principle (LSP)
Student : Md. Farid Hossen Rehad
Computer Science & Engineering
Discipline
From Khulna University
_______________________________________________________________________________________________________________________________________________________
*/
/**
* Represents a vehicle with a method to accelerate.
*/
interface Vehicle {
/**
* Accelerates the vehicle.
*/
void accelerate();
}
/**
* Represents a car, a type of vehicle.
*/
class Car implements Vehicle {
@Override
public void accelerate() {
System.out.println("Car accelerating");
}
}
/**
* Represents an electric car, a special case of a car.
*/
class ElectricCar extends Car {
/**
* Accelerates the electric car.
* This method overrides the accelerate method in the parent class.
*/
@Override
public void accelerate() {
System.out.println("Electric car accelerating silently");
}
}
/**
* Represents a race car, a special case of a car.
*/
class RaceCar extends Car {
/**
* Accelerates the race car.
* This method overrides the accelerate method in the parent class.
*/
@Override
public void accelerate() {
System.out.println("Race car accelerating loudly");
}
}
/**
* Simulates a race scenario with different types of cars.
*/
class RaceSimulation {
/**
* Accelerates a vehicle.
*
* @param vehicle The vehicle to accelerate.
*/
public void simulateRace(Vehicle vehicle) {
vehicle.accelerate();
}
}
/**
* Demonstrates the usage of different types of cars in a race simulation.
*/
class LSPExample {
public static void main(String[] args) {
RaceSimulation raceSimulation = new RaceSimulation();
Car regularCar = new Car();
ElectricCar electricCar = new ElectricCar();
RaceCar raceCar = new RaceCar();
// Simulate race with different types of cars
raceSimulation.simulateRace(regularCar);
raceSimulation.simulateRace(electricCar);
raceSimulation.simulateRace(raceCar);
}
}
/**
* In the above program, ElectricCar and RaceCar classes are special cases of the Car class.
* The LSP is maintained because instances of ElectricCar and RaceCar can be substituted
* for a Car without affecting the correctness of the program.
*/