krohit-bkk

// class Assignee
abstract class Assignee {}

// Interface Dev for Developer tasks
interface Dev { void code(); }

// Interface QA for Test tasks
interface QA { void test(); }

// Developer is an Assingee

krohit-bkk

// Interface Tasks
interface Tasks {
    void code();
    void test();
}

// Class Assignee
abstract class Assignee implements Tasks {}

// Developer is an Assingee

krohit-bkk

// 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

krohit-bkk

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

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

krohit-bkk

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

class Item {
    private final String type;
    private final double price;
    private DiscountStrategy discountStrategy;
    
    public Item(String type, double price, DiscountStrategy discountStrategy) {
        this.type = type;