Orders

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.Scanner;

public class Orders {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        LinkedHashMap<String, ArrayList<Double>> orders = new LinkedHashMap<>();
        String input = scanner.nextLine();

        while (!"buy".equals(input)) {
            String[] tokens = input.split(" ");
            String product = tokens[0];
            double price = Double.parseDouble(tokens[1]);
            double quantity = Double.parseDouble(tokens[2]);

            if (!orders.containsKey(product)) {
                orders.put(product, new ArrayList<>());
                orders.get(product).add(price);
                orders.get(product).add(quantity);
            } else {
                    orders.get(product).set(0, price);
//                if (orders.get(product).get(0) != price) {
//                }
                    double newQuantity = orders.get(product).get(1) + quantity;
                    orders.get(product).set(1, newQuantity);
//                if (orders.get(product).get(1) != quantity) {
//                }
            }

            input = scanner.nextLine();
        }
        orders.entrySet()
                .stream()
                .forEach(o -> System.out.println(String.format("%s -> %.2f",
                        o.getKey(), o.getValue().get(0) * o.getValue().get(1))));
    }
}