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In this video, I'm going to cover the solution to task for where we tie everything together and add

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user interactivity.

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So we're going to start by setting up a scanner.

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I'm going to create an object of the scanner class.

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And as always, we pass system, not into its constructor.

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And then going to copy and paste the following from learn the parts.

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Then I'll pick up the RO.

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And spot.

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All right, now, after the user picks a drink from the machine, we have to dispense it so machine

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that dispense.

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At the request of the row and spot.

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And after we dispense a drink to the user, the quantity of that drink should decrease by one.

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So we're going to print the updated machine print online.

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I'll start off with a new line, plus the machine objects.

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When your code.

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OK, let's say I want to purchase a Barq's root beer.

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That would be a real one, inducts one and it sells me a drink and now there's one left.

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Great.

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Now, what if only by more than one drink, I need to run this code in a loop and the easiest way to

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approach this is to create a while loop that runs forever.

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So while true.

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I'll put all of this code inside.

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Highlight it.

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Press tab.

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OK, I'm ready to run the code.

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And I'm going to keep purchasing the Berkshire bear.

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It's going to keep dispensing a drink, and every time it dispenses a drink, we need to say something

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like enjoy your drink, press one to buy another.

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Until that item runs out, it stops dispensing, in which case we need to tell the user we're out of

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this item, press one to purchase another, and this should be very easy to implement because our method

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dispense returns a boolean that confirms if that item was dispensed or not.

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So we'll store the bullion that it returns and a variable called Dispensed.

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And if that machine dispenses a drink, if dispensed is equal to true.

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Will print the following message.

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Otherwise, if the machine doesn't dispense a drink, then it could only be because that item ran out.

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So we'll print this message.

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And regardless of which block gets executed, if the user enters anything that isn't one, we need to

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break the loop, so pick up the users answer scanned on extent.

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And if their answer is not one.

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Break the loop.

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And I'm happy to say that now we're all done.

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OK, run the code.

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I'll purchase the berry, which is Zaccaro to index to.

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I'll try purchasing it again, so I'll press one.

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I'll choose the berry once more.

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And it tells me that it's empty, I'll purchase another.

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Let me get a Coca-Cola.

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Wrote to eliminate one.

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OK, now I'm satisfied I'll press zero and I'll break the lip.

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All right, I purchased two drinks from the vending machine, ran out of Barry and one Coca-Cola remains.

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But that being said, congratulations, this is the third application that we programmed using objects.

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And notice how easy it is to read the code, your code becomes a lot more organized when you program

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using objects.

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And now that you know how to write high quality code, the next step is to write the reliable code code

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that doesn't crash and we're going to accomplish that with exception handling.

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I will see you in the next section.