Main.java - master - digit/java-oop-collections-hash

Main.java
79 строк3 KB
digit
Create: Main.java, Address.java, Update: README.md
18 июл 2026, 13:25
18 июл 2026, 13:256a412d4
import java.util.Map;
import java.util.HashMap;
import java.util.Set;
import java.util.HashSet;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Map<Address, Integer> costPerAddress = getAddresses();
        Set<String> uniqueCountries = new HashSet<>();

        int totalDeliveryCost = 0;
        Scanner scanner = new Scanner(System.in);
        boolean isRunning = true;
        while (isRunning) {
            System.out.println("Заполнение нового заказа.");

            String userCountry;
            System.out.print("Введите страну: ");
            userCountry = scanner.nextLine();

            String userCity;
            System.out.print("Введите город: ");
            userCity = scanner.nextLine();

            String userWeight; // String!
            System.out.print("Введите вес (кг): ");
            userWeight = scanner.nextLine();

            isRunning = isNotEnd(userCountry, userCity, userWeight); // ("end" || "end" || "end") -> false
            if (!isRunning) { // false -> выход из цикла
                break;
            }

            Address userAddress = new Address(userCountry, userCity);
            totalDeliveryCost += increaseTotal(userWeight, costPerAddress, userAddress); // Integer.parseInt(userWeight)

            if (costPerAddress.containsKey(userAddress)) {
                uniqueCountries.add(userCountry);
            }

            printDeliveryOverview(costPerAddress, userAddress, totalDeliveryCost, uniqueCountries);
        }
    }

    public static Map<Address, Integer> getAddresses() {
        Map<Address, Integer> costPerAddress = new HashMap<>();
        Address address1 = new Address("Россия", "Москва");
        Address address2 = new Address("Китай", "Пекин");
        Address address3 = new Address("США", "Вашингтон");
        Address address4 = new Address("Россия", "Санкт-Петербург");

        costPerAddress.put(address1, 1000);
        costPerAddress.put(address2, 2000);
        costPerAddress.put(address3, 3000);
        costPerAddress.put(address4, 1500);

        return costPerAddress;
    }

    public static boolean isNotEnd(String country, String city, String weight) {
        return !(country.equals("end") || city.equals("end") || weight.equals("end"));
    }

    public static void printDeliveryOverview(Map<Address, Integer> costPerAddress, Address userAddress,
                                             int totalDeliveryCost, Set<String> uniqueCountries) {
        if (costPerAddress.containsKey(userAddress)) {
            System.out.printf("Стоимость доставки составит: %d руб.\n", costPerAddress.get(userAddress));
            System.out.printf("Общая стоимость всех доставок: %d руб.\n", totalDeliveryCost);
            System.out.printf("Уникальных стран для доставки: %d\n\n", uniqueCountries.size());
        } else {
            System.out.print("Доставки по этому адресу нет\n\n");
        }
    }

    public static int increaseTotal(String userWeight, Map<Address, Integer> costPerAddress, Address userAddress) {
        return Integer.parseInt(userWeight) * costPerAddress.get(userAddress);
    }
}