ukol.java

class Main {
  class Item {
    public String Name;
    public Double Price;

    private int getPlateSize() { ... }
  }

  class OrderedItem {
    public Item item;
    public Receipt receipt;
    
    void serve() {
      var plateSize = getPlateSize();
      // put food to plate size ...
    }

    void cancel() { ... }
  }

  class Receipt {
    public ArrayList<OrderedItem> Items;
    public int TableNumber;

    public returnOrderedItem(Item item) { ... search item in ordered item ... cancel(); }
  }

  class CashRegister {
    public ArrayList<Receipt> Receipts;

    public CashRegister() { ... }

    void searchReceipt(int tableNumber) { ... }
  }

  class DrinkActionPrice {
    String getDrinkActionPrice() {
      return "30% between 14:00 - 16:00.";
    }
  }

  class MainCourseActionPrice {
    String getMainCourseDiscount() {
      return "20% between 11:00 - 13:00.";
    }
  }

  class ActionPriceManager {
    void processDrinkActionPrice(DrinkActionPrice actionPrice) {...}
    void processMainCourseActionPrice(MainCourseActionPrice actionPrice) {...}
  }

  class CrispyChicken extends Item {
    @Override
    private int getPlateSize() { ... }
  }

  class Redbull extends Item {
    @Override
    private int getPlateSize() { ... }
  }

  public interface ItemAction {
    void returnBackToWaiter();
    void eat();
    void drink();
  }

  class CrispyChickenAction {  
    public Item item;

    void returnBackToWaiter() { ... } 
    void eat() { ... } 
    void drink() { ... } 
  }

  class RedbullAction {  
    public Item item;

    void returnBackToWaiter(int tableNumber) { cashRegister.searchReceipt(tableNumber).returnOrderedItem(item); } 
    void eat() { ... } 
    void drink() { ... } 
  }

  public static CashRegister cashRegister = new CashRegister();

  public static void main(String[] args) throws Exception {
    
  }
}