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Restaurant (part 7)

Java Multithreading, Level 9, Lesson 15

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I don't understand why it didn't pass verification

When choosing which class to start from, try to find one that is used by others, and which does not use anything.
In our case, this is the repository of advertising videos (AdvertisementStorage).
We decided that it would be the only one in the restaurant and made it a singleton.

Let's describe it.
1. The videos need to be stored somewhere. Let's make it a list.
Create a videos field and initialize it with an empty list.
Think about whether the videos field should be able to change its value?

2. To make it possible to work with the videos, create the following public methods:
2.1. list() - returns a list of all available videos.
2.2. add(Advertisement advertisement) - adds a new video to the videos list.

3. In the class constructor, let's add some data to the videos list. This is what I have:
Object someContent = new Object();
new Advertisement(someContent, "First Video", 5000, 100, 3 * 60) // 3 min
new Advertisement(someContent, "Second Video", 100, 10, 15 * 60) // 15 min
new Advertisement(someContent, "Third Video", 400, 2, 10 * 60) // 10 min

4. In the AdvertisementManager class, we'll create a final field that references an instance of AdvertisementStorage and call it storage.
Don't forget to initialize this field!

Requirements:

A storage field that references an instance of the AdvertisementStorage class must be created in the AdvertisementManager class.
In the AdvertisementStorage class, the videos list must be declared with the final modifier.
In the AdvertisementStorage class, the list method must return the videos list and must be public.
In the AdvertisementStorage class, the add method must have one Advertisement parameter and add the passed object to the videos list.
In the AdvertisementStorage class constructor, several Advertisement objects must be added to the videos list.

package com.codegym.task.task27.task2712; import com.codegym.task.task27.task2712.kitchen.Cook; 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("Amigo"); Waiter waiter = new Waiter(); tablet.addObserver(cook); cook.addObserver(waiter); tablet.createOrder(); tablet.createOrder(); tablet.createOrder(); tablet.createOrder(); } }

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KIN SOCHEAT

Level 34 , Phnom Penh, Cambogia

27 July 2020, 09:04

line 12-15 copy from 3. In the class constructor, let's add some data to the videos list. This is what I have: Object someContent = new Object(); new Advertisement(someContent, "First Video", 5000, 100, 3 * 60) // 3 min new Advertisement(someContent, "Second Video", 100, 10, 15 * 60) // 15 min new Advertisement(someContent, "Third Video", 400, 2, 10 * 60) // 10 min

Alexandre Lalancette

Level 41 , Quebec, Canada

24 January 2020, 05:53

1- Videos field should not be static. 2- In constructor, call "this.add" instead of "videos.add" 3- Both new method should not be static