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This video is going to cover the solution for part three, looking back at the requirement to be classified

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as another type of object, the store and the store is identified by the movies that it manages.

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A store also has four actions, adding movies, selling them rent and returning them.

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We'll start by adding the field, the movie's field is plural, which implies an array of movie objects,

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but once again, we need to use an array list because the number of elements can change, movies can

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be added and they can be removed.

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And always if a class has fields, you need to apply the big three steps.

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We need to add a constructor, a getter and a setter.

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The constructor is public shares the same name as the class and it receives no parameters.

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Because in the beginning, the list of movies should be empty.

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We're just going to set the field equal to a new array list.

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That can store movie objects.

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Now we want to add a getter that receives one parameter.

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The index of the movie object that they're trying to access, and this Geter is going to return a new

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copy.

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Of the movie Object at the requested index.

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Now we want at a Seder that receives two parameters.

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The index of the element you want to updates and a movie object that we're going to update the element

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with, then we're going to set the element at the requested index.

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Equal to a new copy of the movie Object being passed on.

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OK, that's all for the Big Three Steps now we're going to add actions.

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One action that the store can perform is at a movie to its collection, I'll create a void method named

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ad movie receives one parameter, a movie object.

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And inside the contacts array list, we're going to add a new copy of the movie Object Being Pastan.

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OK, the next action that it can perform is telemovie, the method is Void, called Sell Movie.

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And it receives one parameter, the name of the movie you want to sell.

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So what we'll do is credit for a loop that runs through the size of the array list.

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Remember, that array lists have a size knot length.

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And inside the fur loop, we're going to get the movie object at every index I.

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We'll get the name failed of that movie and we'll check if it equals the name of the movie, that was

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Pastan.

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And if that's the case.

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Then we're going to remove the movie from their list.

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We'll do the same thing for that movie.

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It's also void.

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And it receives one parameter, the name of the movie you want to rent.

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And once again, we'll need another for a loop that runs through the size of the array list, and then

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we need to get the movie object that every index I.

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Get the name field of that movie.

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And we'll check if it equals the name of the movie that was Pastan.

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Wait a second.

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The code that I'm writing now in this method is identical to the code that I wrote in cell movie.

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And if you think about it, even the signature is identical, they're both void and they receive the

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same parameter.

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And guess what, the code for returning a movie is also going to be identical.

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So instead of having three functions that are doing the exact same thing.

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We're going to create one function that's void.

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Named action, the first parameter is going to be name because all three methods are going to require

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a name and the second parameter is a string that represents the type of action they want to perform.

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Once again, will create a for loop that runs through the size of the array list.

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We're going to get the movie object that every index I.

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We'll get the name filled of that movie.

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And we'll check if it equals the name of the movie that was Pastan.

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And if this condition is true, what we do is going to depend on the action parameter, so here I'll

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create a switch statement that runs against a list of cases.

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If the cases sell.

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Then we're going to remove the movie from the collection.

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If the case is rent.

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Then we're going to set the availability of that movie to false.

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And if the cases return.

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Then we're going to set the availability of that movie to trip.

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Don't forget to add the keyword at the end of each case.

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Kate, now our final task before we can test our code is that a two string method that returns a nicely

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formatted string of every movie in the array list, as always, public string to string.

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I'll create a string named temp for a temporary.

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It's going to be an empty string for now, when we return, it's.

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First will create a loop that runs through the size of the array list.

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And during each run, I'm going to get the two string of the movie object at the index eye and add the

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string to the temp variable that we're returning.

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And after adding the two string of the movie, we can add two lines so that we can separate it from

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the next two string they got to Pastan.

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And that's it now we got to test our code inside main kryten object of the store class.

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And the store is going to start by adding three movies, I'm going to use the values from the article.

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Store, ad movie.

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I'll add the first one, The Shawshank Redemption.

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And I'm going to copy this format for the two other movies.

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And now we can just print the story.

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And good returns, a nicely formatted string of every movie in the movie store, so the ad action works.

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Now I'm going to test the cell action.

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I'm going to sell The Godfather.

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And Perfect's, after selling The Godfather, it gets removed from our collection.

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Now I'm going to rent out The Shawshank Redemption.

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We run the code.

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And The Shawshank Redemption is not in stock anymore.

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Beautiful.

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That is all for part three.

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I'll see you in part for.