import java.util.*;

(1) MenuComponent {
    protected String name;
    (2); // 添加新菜单
    public abstract void print(); // 打印菜单信息
    public String getName() { return name; }
}

class MenuItem extends MenuComponent {
    private double price;
    public MenuItem(String name, double price) {
        this.name = name; this.price = price;
    }
    public double getPrice() { return price; }
    public void add(MenuComponent menuComponent) { return;} //添加新菜单
    public void print() {
        System.out.print(" " + getName());
        System.out.println("," + getPrice());
    }
}

class Menu extends MenuComponent {
    private List<MenuComponent> menuComponents = new ArrayList<MenuComponent>();
    public Menu(String name) { this.name = name; }
    public void add(MenuComponent menuComponent) { // 添加新菜单
        menuComponents.(3);
    }
    public void print() {
        System.out.print("\n" + getName());
        System.out.println("," + "---------------");
        Iterator iterator = menuComponents.iterator();
        while (iterator.hasNext()) {
            MenuComponent menuComponent = (MenuComponent)iterator.next();
            (4);
        }
    }
}

class MenuTestDrive {
    public static void main(String args[]) {
        MenuComponent allMenus= new Menu("ALL MENUS");
        MenuComponent dinerMenu = new Menu("DINER MENU");
        // 创建更多的Menu对象，此处代码省略
        allMenus.add(dinerMenu); // 将dinerMenu添加到餐厅菜单中
        // 为餐厅增加更多的菜单，此处代码省略
        (5); // 打印饭店所有菜单的信息
    }
}