Zadanie 1

import java.util.ArrayList;
import java.util.List;

class Product {
    private double price;

    public Product(double price) {
        this.price = price;
    }

    double calculateBargainPrice() {
        return price;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }
}

class Vehicle extends Product {
    private String brand;
    private String model;


    public Vehicle(String brand, String model, double price) {
        super(price);
        this.brand = brand;
        this.model = model;
    }

    @Override
    public double calculateBargainPrice() {
        return super.calculateBargainPrice() * .95f;
    }

    @Override
    public String toString() {
        return "Vehicle{" +
                "brand='" + brand + '\'' +
                ", model='" + model + '\'' +
                '}';
    }
}

class Car extends Vehicle {
    private String carBody;

    public Car(String brand, String model, double price, String carBody) {
        super(brand, model, price);
        this.carBody = carBody;
    }

    @Override
    public double calculateBargainPrice() {
        return super.calculateBargainPrice() * 0.85f;
    }

    public String getCarBody() {
        return carBody;
    }

    public void setCarBody(String carBody) {
        this.carBody = carBody;
    }
}

class Motorcyce extends Vehicle {
    private String typeOfDriver;

    public Motorcyce(String brand, String model, double price, String typeOfDriver) {
        super(brand, model, price);
        this.typeOfDriver = typeOfDriver;
    }

    @Override
    public double calculateBargainPrice() {
        return super.calculateBargainPrice() * .9f;
    }

    public String getTypeOfDriver() {
        return typeOfDriver;
    }

    public void setTypeOfDriver(String typeOfDriver) {
        this.typeOfDriver = typeOfDriver;
    }
}

public class Main {
    public static void main(String[] args) {
        List<Product> list = new ArrayList<>();
        list.add(new Vehicle("Brand", "Model", 10333));
        list.add(new Car("Brand", "Model", 10333, "CarBody"));
        list.add(new Motorcyce("Brand", "Model", 10333, "TypeOfDriver"));
        list.forEach(System.out::print);
    }
}

Zadanie 2

import java.util.ArrayList;
import java.util.List;
import java.util.function.Supplier;

abstract class Product {
    private double price;

    public Product(double price) {
        this.price = price;
    }

    abstract double calculateBargainPrice();

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }
}

abstract class Vehicle extends Product {
    private String brand;
    private String model;


    public Vehicle(String brand, String model, double price) {
        super(price);
        this.brand = brand;
        this.model = model;
    }

    @Override
    public String toString() {
        return "Vehicle{" +
                "brand='" + brand + '\'' +
                ", model='" + model + '\'' +
                '}';
    }
}

class Car extends Vehicle {
    private String carBody;

    public Car(String brand, String model, double price, String carBody) {
        super(brand, model, price);
        this.carBody = carBody;
    }

    @Override
    double calculateBargainPrice() {
        return calculateBargainPrice() * 0.85f;
    }

    public String getCarBody() {
        return carBody;
    }

    public void setCarBody(String carBody) {
        this.carBody = carBody;
    }
}

class Motorcyce extends Vehicle {
    private String typeOfDriver;

    public Motorcyce(String brand, String model, double price, String typeOfDriver) {
        super(brand, model, price);
        this.typeOfDriver = typeOfDriver;
    }

    @Override
    double calculateBargainPrice() {
        return calculateBargainPrice() * 0.9f;
    }

    public String getTypeOfDriver() {
        return typeOfDriver;
    }

    public void setTypeOfDriver(String typeOfDriver) {
        this.typeOfDriver = typeOfDriver;
    }
}

public class Main {
    public static void main(String[] args) {
        List<Product> list = new ArrayList<>();
        list.add(new Vehicle("Brand", "Model", 10333) {
            @Override
            double calculateBargainPrice() {
                return 1000;
            }
        });
        list.add(new Car("Brand", "Model", 10333, "CarBody"));
        list.add(new Motorcyce("Brand", "Model", 10333, "TypeOfDriver"));
        list.forEach(System.out::print);
    }
}

Zadanie 3

import java.util.ArrayList;
import java.util.List;

class Product implements ProductInterface {
    private double price;

    public Product(double price) {
        this.price = price;
    }

    @Override
    public double calculateBargainPrice() {
        return price;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }
}

class Vehicle extends Product implements VehicleInterface {
    private String brand;
    private String model;


    public Vehicle(String brand, String model, double price) {
        super(price);
        this.brand = brand;
        this.model = model;
    }

    @Override
    public double calculateBargainPrice() {
        return super.calculateBargainPrice() * .95f;
    }

    @Override
    public String toString() {
        return "Vehicle{" +
                "brand='" + brand + '\'' +
                ", model='" + model + '\'' +
                '}';
    }

    @Override
    public String getBrand() {
        return brand;
    }

    @Override
    public String getModel() {
        return model;
    }
}

class Car extends Vehicle {
    private String carBody;

    public Car(String brand, String model, double price, String carBody) {
        super(brand, model, price);
        this.carBody = carBody;
    }

    @Override
    public double calculateBargainPrice() {
        return super.calculateBargainPrice() * 0.85f;
    }

    public String getCarBody() {
        return carBody;
    }

    public void setCarBody(String carBody) {
        this.carBody = carBody;
    }
}

class Motorcyce extends Vehicle {
    private String typeOfDriver;

    public Motorcyce(String brand, String model, double price, String typeOfDriver) {
        super(brand, model, price);
        this.typeOfDriver = typeOfDriver;
    }

    @Override
    public double calculateBargainPrice() {
        return super.calculateBargainPrice() * .9f;
    }

    public String getTypeOfDriver() {
        return typeOfDriver;
    }

    public void setTypeOfDriver(String typeOfDriver) {
        this.typeOfDriver = typeOfDriver;
    }
}

interface ProductInterface {
    double calculateBargainPrice();
    double getPrice();
    void setPrice(double price);
}

interface VehicleInterface extends ProductInterface {
    String getBrand();
    String getModel();
}

public class Main {
    public static void main(String[] args) {
        List<ProductInterface> list = new ArrayList<>();
        list.add(new Vehicle("Brand", "Model", 10333));
        list.add(new Car("Brand", "Model", 10333, "CarBody"));
        list.add(new Motorcyce("Brand", "Model", 10333, "TypeOfDriver"));
        list.forEach(System.out::print);
    }
}