Code snippet 2 for Loskov Substitution Principle

LSP.java

// Enforce fossil cars to have method to return mileage
interface Refuelables { float getMileage(); }

// Car has mileage
abstract class Car { abstract float calculateRange(); }

// Fossil car is a car
abstract class FossilCar extends Car { float fuel; abstract float getMileage(); }

// Petrol car is a fossil car
class PetrolCar extends FossilCar implements Refuelables{
    public PetrolCar(float fuel) { this.fuel = fuel; }
    @Override
    public float getMileage() { /* some complex logic*/ return 10f; }
    @Override
    public float calculateRange() { return this.getMileage() * this.fuel; }
}

// Diesel car is a fossil car
class DieselCar extends FossilCar {
    public DieselCar(float fuel) { this.fuel = fuel; }
    @Override
    public float getMileage() { /* some complex logic*/ return 15; }
    @Override
    public float calculateRange() { return this.getMileage() * this.fuel; }
}

// Electric car is a car
abstract class ElectricCar extends Car { float battery; }

// Fixed battery car is an electric car
class FixedBatteryCar extends ElectricCar {
    public FixedBatteryCar(float battery) { this.battery = battery; }
    @Override
    float calculateRange() { /* some complex logic */ return this.battery * 8f; }
}

// Fixed battery car is an electric car
class SwappableBatteryCar extends ElectricCar {
    public SwappableBatteryCar(float battery) { this.battery = battery; }
    @Override
    float calculateRange() { /* some other complex logic */ return this.battery * 6f; }
}

// TripPlanner class uses Car
class TripPlanner {
    public float getRange(Car car){ return car.calculateRange(); }
}

public class LSP {
    public static void main(String[] args) {
        Car petrolCar = new PetrolCar(10);
        Car dieselCar = new DieselCar(10);
        Car teslaCar = new FixedBatteryCar(10);
        Car rivionCar = new SwappableBatteryCar(10);

        TripPlanner trip = new TripPlanner();
        System.out.println("This petrol car can go: " + trip.getRange(petrolCar));
        System.out.println("This diesel car can go: " + trip.getRange(dieselCar));
        System.out.println("This Tesla car can go : " + trip.getRange(teslaCar));
        System.out.println("This Rivian car can go: " + trip.getRange(rivionCar));
    }
}

Program output:

This petrol car can go: 100.0
This diesel car can go: 150.0
This Tesla car can go : 80.0
This Rivian car can go: 60.0