All language subtitles for 056 Movie Store – Part 5, Tasks 1-3 (Solution)_en

In this video.

We're going to cover the solution for part five.

Once again, we tie everything together by adding user interactivity.

Task one tells us to make the store object a class variable because we are going to need to access it

from more than one place inside the class.

Task two is to define a function named load movies.

It takes one parameter, the file name that we're going to load movies from and the function is going

to throw a file not found exception.

First thing we're going to do is load contacts from the file name.

We can use a file input stream.

We'll create a new object of the file input stream class and pass into it the file name that we want

to connect to.

The next thing we need to do is read the data from the movies file.

So after connecting to the file will create a new getter object.

And instead of receiving input from the system, it's going to receive input from the input stream.

And then we can use a while loop to read all the data from the file that we're scanning.

The while loop will keep running as long as the file has a next line.

So it should run ten times.

And during each run, we're going to create a new movie object.

But wait.

Each movie is separated by hyphens.

We can't use Scandal.

Next, bigger scandal.

Next picks up the next value delimited by a white space.

In this case, the delimiter is two hyphens.

So during each run, we're going to have to pick up the entire line as one string.

String line is equal to scandal.

Our next line.

Based on the delimiter, we know that each line can split into three strings.

And I told you to research how the split function can be used to split a string into multiple strings.

So I hope you came up with this.

All you got to do is say line, not split.

And we're going to split the line every time there's a pair of hyphens.

If you hover on the method, it returns an array of string values, which we're going to store in an

array called words.

This array is going to contain three elements because we know that the line was split into three words.

The first word we know is the name.

The second word is the format.

And the third is the rating.

A oh rating is a double, but it's being stored as a string.

And your task was to research how to parse a double from a string.

And I hope you found something like this.

We're going to use the wrapper class double.

To pass a double.

From the string at index to.

And splendid.

And once you're done, don't forget to close the scanner object.

And that's it for the load movies function.

We'll go back to the main method we're going to call Load Movie.

And the file we're going to be loading movies from is movies that text.

Once again we get an error because the load movies method can through a file not found exception.

This is a tactics option.

So if you want to call this method, Java is going to force you to try to run the code.

And if the code happens to fail, you need to catch the file, not a found exception.

And we'll just print the message that comes out of it.

Here.

We're going to print.

Movies loaded.

Followed by two lines.

Then we'll print the two string of the store object.

And.

Okay, I want to test everything before moving on.

We write a lot of code and went at a break point right here.

Launch the debugger.

And step into the function.

I'll step over creating the file input stream as well as the scanner object.

The wire loop runs through every line in the movie file injury each run.

We're picking up the entire line.

Then we're splitting the line around every pair of hyphens.

As a result, we get an array with three values.

Then we're using these values to create a new object and add it to the collection of movies.

And you know what?

I'll never get bored of visualizing code.

It's really cool.

Now there are a lot of movies, so I'll start the debugger here.

And that's all for tasks.

One, two and three.

In the next video over an implement task for.