CodeGym/Help with Java Tasks/Please help :)

Level 41

Provins

17.10.2019
1073views
15comments

Please help :)

Question about the task

Archived

It seems that I fuflill the conditions, the output is correct. I don't know why this doesn't validate... If someone could point me the right direction so I can continue this big task that would be awsome! Thanks in advance

The cook currently prepares dishes instantaneously. In reality, cooking takes some time.
We need to calculate the time required to prepare the entire order, so we can then select commercials to fill the time.

1. Suppose we know the cooking time for each dish in minutes. We'll hardcode it in the Dish class.
1.1. Change the creation of the enum fields: Fish(25), Steak(30), Soup(15), Juice(5), Water(3);
1.2. Create a private int duration field with a getter.
To create a getter, press Alt+Insert and select Getter. Next, select the field name and click OK (Enter).

2. Add the ability to calculate the time required to prepare the whole order.
Where should you add it???
2.1. If you add it to the Cook class, then the cook will be able to calculate how long it will take to prepare the order.
For other classes to get this information, they will need access the Cook object.
2.2. If you add it to the Order class, then access to the order will always let you find out how long the order will take.
2.3. Choose the right place from either item 2.1 or item 2.2, and add a public int getTotalCookingTime() method, which will calculate the total time required to prepare all the dishes in the order.
2.4. Let's add this information to what our cook outputs to the console. Now let's display a message like this:
Start cooking - Your order: [Soup, Juice, Water] from Tablet{number=5}, cooking time 23 min

Let's make it pretty:
3. Start the application and immediately enter 'exit'. The output isn't very beautiful.
Make it so that if there are no dishes in the order, then it doesn't get sent to the cook. Find this relevant place and implement the logic.
In the Order class, create a public boolean isEmpty() helper method that determines whether there are any dishes in the order.

Requirements:

The cooking time must correspond to the task conditions.
The duration field in the Dish enum must be private and have a public getter.
The Order class must have a public int getTotalCookingTime method that returns the amount of time required to prepare the current order.
In addition to returning the list of dishes in the order, the required cooking time must also be displayed on the screen.
If there are no dishes in the order, it should not be sent to the cook.
The Order class's isEmpty method must return true if the order is empty.

package com.codegym.task.task27.task2712; import com.codegym.task.task27.task2712.kitchen.Cook; import com.codegym.task.task27.task2712.kitchen.Order; import com.codegym.task.task27.task2712.kitchen.Waiter; public class Restaurant { public static void main(String[] args) { Tablet tablet = new Tablet(1); Cook cook = new Cook("Nicolas"); Waiter waiter = new Waiter(); cook.addObserver(waiter); tablet.addObserver(cook); tablet.createOrder(); tablet.createOrder(); tablet.createOrder(); tablet.createOrder(); } }

Comments (15)

Popular
New
Old

You must be signed in to leave a comment

KIN SOCHEAT

Level 34 , Phnom Penh, Cambogia

27 July 2020, 04:20

it should be not display anything

KIN SOCHEAT

Level 34 , Phnom Penh, Cambogia

27 July 2020, 04:20

3. Start the application and immediately enter 'exit'. The output isn't very beautiful.

Roman

Level 41

18 October 2019, 08:56

menuChoice may be null, consider this

Nicolas Huet

Level 41 , Provins, France

18 October 2019, 09:40

You mean if nothing is entered by the user? In that case I thought it was taking care of since in that case I don't send it to the cook. When I run the code and doesn't enter anything, the programme simply asks to add something from the menu o entering "exit". I don't really see the problem :(

Nicolas Huet

Level 41 , Provins, France

18 October 2019, 09:45

If I trie somehow to add an if null statement on menuChoice, IntelliJ says that the condition is always false. I know I'm missing something here but I don't know where

Roman

Level 41

21 October 2019, 06:09

while (menuChoice != null && !menuChoice.equals("exit")){...

And IntelliJ says nothing)

Nicolas Huet

Level 41 , Provins, France

21 October 2019, 08:14

I feel kind of stupid because I know I must be missing something obvious but it still doesn't validate.

Roman

Level 41

22 October 2019, 05:24

solution

Your code:

while (!menuChoice.equals("exit") && menuChoice != null){...

My:

while (menuChoice != null && !menuChoice.equals("exit")){...

Do you see the differences? ) You must check for null before first use!

Nicolas Huet

Level 41 , Provins, France

22 October 2019, 05:46

OMG I truly ignored that fact (or forgot it I don't know... Thank you very much Roman!

Guadalupe Gagnon

Level 37 , Tampa, United States

17 October 2019, 17:15

return dishes.isEmpty() ? "" : "Your order: " + dishes + " of " + tablet; should be return dishes.isEmpty() ? "" : "Your order: " + dishes + " from " + tablet;

Nicolas Huet

Level 41 , Provins, France

17 October 2019, 18:03

Sadly it makes no difference in the validation, same exact 2 errors :/

Guadalupe Gagnon

Level 37 , Tampa, United States

17 October 2019, 18:20

Have you tried adding the cooking time to the end of order.toString() instead of cook.update()?

Nicolas Huet

Level 41 , Provins, France

17 October 2019, 20:30

Yes I tried that also, it still doesn't validate :/

Guadalupe Gagnon

Level 37 , Tampa, United States

18 October 2019, 13:49

I wish i could be of more help, I don't see any obvious errors and since I don't have access to my original code that I used to pass this task (I have since replaced computers) I just don't know. Hopefully Roman can give you enough hints to pass verification, he has been helpful to me in the past.

Nicolas Huet

Level 41 , Provins, France

19 October 2019, 07:56

Thanks for your help! I also hope Roman will give me more hints to validate, I don't want to skip a whole big task... Anyway, thanks again for doing your best to help me!