18- Solution- Getting a Quote

Jul 04, 2026 01:26 · 4:15 · English · Whisper Turbo · 2 वक्ता

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S… Speaker 2 (18- Solution- Getting a Quote)

Alright, the first thing we need to do is to add a class called quote In

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S… Speaker 2 (18- Solution- Getting a Quote)

this class we need two fields the name of the website

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and the price they're offering so private string

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site and private Let's use an integer for

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simplicity, but in a real -world scenario the price should be a float Now

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S… Speaker 2 (18- Solution- Getting a Quote)

I would prefer to make both these fields final

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So we don't accidentally change their value in our program

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Now, because they're final,

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we should initialize them through a constructor.

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S… Speaker 1 (18- Solution- Getting a Quote)

So,

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let's generate a constructor.

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I'm going to select the site field first,

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and then the price.

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So now we have a constructor with these two parameters,

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S… Speaker 2 (18- Solution- Getting a Quote)

pretty straightforward.

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S… Speaker 2 (18- Solution- Getting a Quote)

We also need getters for these fields.

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S… Speaker 1 (18- Solution- Getting a Quote)

So,

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alt and enter,

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S… Speaker 2 (18- Solution- Getting a Quote)

create getter for site,

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and then create getter for price.

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S… Speaker 2 (18- Solution- Getting a Quote)

We're done with this class.

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S… Speaker 1 (18- Solution- Getting a Quote)

Now,

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S… Speaker 1 (18- Solution- Getting a Quote)

let's add a new class called

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flight service.

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S… Speaker 2 (18- Solution- Getting a Quote)

With this class,

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we're going to get a quote from a given flight agency.

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S… Speaker 2 (18- Solution- Getting a Quote)

So here we need a method called get quote public quote

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S… Speaker 2 (18- Solution- Getting a Quote)

get quote from this website.

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S… Speaker 2 (18- Solution- Getting a Quote)

There's a problem here.

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S… Speaker 2 (18- Solution- Getting a Quote)

Can you tell I'm returning a quote object?

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S… Speaker 2 (18- Solution- Getting a Quote)

This is a synchronous method.

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We don't want our methods to run synchronously.

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S… Speaker 2 (18- Solution- Getting a Quote)

So instead of a quote,

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we should return a completable future of quote and

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here you return

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S… Speaker 2 (18- Solution- Getting a Quote)

completable future dot supply async.

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S… Speaker 1 (18- Solution- Getting a Quote)

Now,

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here we're going to simulate calling a remote service.

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S… Speaker 2 (18- Solution- Getting a Quote)

So I'm going to use long task dot simulate.

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S… Speaker 2 (18- Solution- Getting a Quote)

And then we should return a quote object.

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S… Speaker 1 (18- Solution- Getting a Quote)

So,

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return new quote.

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S… Speaker 2 (18- Solution- Getting a Quote)

Now we should pass the name of the site as well

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as the price.

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S… Speaker 2 (18- Solution- Getting a Quote)

We're going to calculate the price randomly.

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S… Speaker 1 (18- Solution- Getting a Quote)

So,

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S… Speaker 2 (18- Solution- Getting a Quote)

let's create a random object.

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S… Speaker 1 (18- Solution- Getting a Quote)

New random.

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S… Speaker 2 (18- Solution- Getting a Quote)

Now let's say the price is going to be somewhere between 100 and 110

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dollars.

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S… Speaker 1 (18- Solution- Getting a Quote)

So,

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we set price to 100 plus,

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S… Speaker 2 (18- Solution- Getting a Quote)

then here we use a random object to generate a random

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integer between 0 and 10.

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S… Speaker 1 (18- Solution- Getting a Quote)

Okay?

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S… Speaker 2 (18- Solution- Getting a Quote)

Now we pass it over here.

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S… Speaker 2 (18- Solution- Getting a Quote)

Also for clarity,

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S… Speaker 2 (18- Solution- Getting a Quote)

I would prefer to add a message here.

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S… Speaker 2 (18- Solution- Getting a Quote)

Getting a quote from this

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S… Speaker 1 (18- Solution- Getting a Quote)

website.

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S… Speaker 2 (18- Solution- Getting a Quote)

Now I forgot to put a semicolon over here.

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S… Speaker 1 (18- Solution- Getting a Quote)

Good.

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S… Speaker 2 (18- Solution- Getting a Quote)

Now let's test this.

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So we go to our demo class and create

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S… Speaker 2 (18- Solution- Getting a Quote)

a flight service object.

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New flight service.

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Then we call service .git quote.

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Let's pass site1.

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This returns a completable feature.

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S… Speaker 2 (18- Solution- Getting a Quote)

So we can call then accept.

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Here we pass a consumer.

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S… Speaker 2 (18- Solution- Getting a Quote)

This is where we get the quote.

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S… Speaker 1 (18- Solution- Getting a Quote)

And

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we can print it on the terminal.

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S… Speaker 1 (18- Solution- Getting a Quote)

Now,

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S… Speaker 2 (18- Solution- Getting a Quote)

for simplicity,

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I'm going to go to the quote class and overwrite the toString method.

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S… Speaker 1 (18- Solution- Getting a Quote)

So,

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we put the caret over here,

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S… Speaker 1 (18- Solution- Getting a Quote)

generate toString,

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I'm going to go with the default implementation,

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so this is going to give us something like quote site equals price.

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S… Speaker 1 (18- Solution- Getting a Quote)

Okay?

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S… Speaker 1 (18- Solution- Getting a Quote)

Now,

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S… Speaker 2 (18- Solution- Getting a Quote)

back to our demo class,

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S… Speaker 2 (18- Solution- Getting a Quote)

here we get the quote and simply print it on the terminal.

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S… Speaker 2 (18- Solution- Getting a Quote)

Now, this lambda expression is simply calling a method.

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So we can use a method reference here.

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S… Speaker 2 (18- Solution- Getting a Quote)

Alt and enter,

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replace with method reference.

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S… Speaker 2 (18- Solution- Getting a Quote)

It's pretty straightforward.

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S… Speaker 2 (18- Solution- Getting a Quote)

So we get a quote and then print it.

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S… Speaker 1 (18- Solution- Getting a Quote)

Now if we run our program,

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S… Speaker 2 (18- Solution- Getting a Quote)

our program is going to terminate immediately because we're not waiting for the result of

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S… Speaker 2 (18- Solution- Getting a Quote)

this asynchronous operation.

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S… Speaker 1 (18- Solution- Getting a Quote)

So I'm going to put a delay

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of let's say 10 seconds.

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S… Speaker 2 (18- Solution- Getting a Quote)

That's way too much,

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S… Speaker 2 (18- Solution- Getting a Quote)

but that's fine for now.

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S… Speaker 2 (18- Solution- Getting a Quote)

Now let's wrap this inside a try catch block.

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S… Speaker 2 (18- Solution- Getting a Quote)

And run our program.

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S… Speaker 1 (18- Solution- Getting a Quote)

So we're getting a quote.

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S… Speaker 2 (18- Solution- Getting a Quote)

After three seconds,

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the quote is ready.

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S… Speaker 2 (18- Solution- Getting a Quote)

Beautiful.

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