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

class Order {

    private final List<LineItem> items = new ArrayList<>();
    private final String orderId;

    public Order(String orderId) {
        this.orderId = orderId;
    }

    // Order creates the LineItem
    public LineItem addLineItem(String productName, int quantity, double unitPrice) {
        LineItem item = new LineItem(productName, quantity, unitPrice, this);
        items.add(item);
        return item;
    }

    public List<LineItem> getItems() {
        return items;
    }

    public String getOrderId() {
        return orderId;
    }
}

class LineItem {

    private final String productName;
    private final int quantity;
    private final double unitPrice;

    // Back reference (not required by UML, but common in practice)
    private final Order owningOrder;

    LineItem(String productName, int quantity, double unitPrice, Order owningOrder) {
        this.productName = productName;
        this.quantity = quantity;
        this.unitPrice = unitPrice;
        this.owningOrder = owningOrder;
    }

    public double getTotal() {
        return quantity * unitPrice;
    }

    public Order getOwningOrder() {
        return owningOrder;
    }
}

public class Example02 {
    public static void main(String[] args) {
        Order order = new Order("CMD-001");

        order.addLineItem("Product A", 3, 10.0);
        order.addLineItem("Product B", 1, 25.0);

        for (LineItem item : order.getItems()) {
            System.out.println(
                item.getOwningOrder().getOrderId() + ": " +
                item.getTotal() + "DZD"
            );
        }

    }
}