AndreyAndBilliard2

package Object;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.TreeMap;

public class AndreyAndBilliard2 {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);

		int n = Integer.parseInt(scanner.nextLine());
		TreeMap<String, Double> shop = new TreeMap<>();

		for (int i = 0; i < n; i++) {
			String[] input = scanner.nextLine().split("-");
			shop.put(input[0], Double.parseDouble(input[1]));
		}

		List<Customer2> allCustomers = new ArrayList<>();

		while (true) {
			String input = scanner.nextLine();
			if (input.equals("end of clients")) {
				break;
			}

			String[] data = input.split("[-,]");
			String name = data[0];
			String product = data[1];
			int quantity = Integer.parseInt(data[2]);

			if (!shop.containsKey(product)) {
				continue;
			}

			Customer2 client = allCustomers.stream().filter(s -> s.getName().equals(name)).findFirst()
					.orElse(Customer2.DEFAULT);

			if (client == null) {
				Customer2 newClient = new Customer2(name);
				newClient.getShopList().put(product, quantity);
				allCustomers.add(newClient);
			} else {
				if (client.getShopList().containsKey(product) == false) {
					client.getShopList().put(product, quantity);
				} else {
					int temp = client.getShopList().get(product);
					client.getShopList().put(product, quantity + temp);
				}
			}
		}

		double total = 0;

		allCustomers.stream().sorted((a, b) -> a.getName().compareTo(b.getName())).forEach(client->{
			System.out.println(client.getName());
			double bill = 0;

			for (Map.Entry<String, Integer> order : client.getShopList().entrySet()) {
				String productName = order.getKey();
				int quantity = order.getValue();
				double price = shop.get(productName);

				System.out.printf("-- %s - %d%n", productName, quantity);
				bill += quantity * price;
			}
			total += bill;
			System.out.printf("Bill: %.2f%n", bill);
		});
		System.out.printf("Total bill: %.2f%n", total);
	}
}

class Customer2 {
	public static final Customer2 DEFAULT = null;
	private String name;
	private TreeMap<String, Integer> shopList;

	public Customer2(String name) {
		this.name = name;
		this.shopList = new TreeMap<String, Integer>();
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public TreeMap<String, Integer> getShopList() {
		return shopList;
	}

	public void setShopList(TreeMap<String, Integer> shopList) {
		this.shopList = shopList;
	}
}