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Scanner uses the delimiter pattern to read your data.

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Before we continue with our dealership, you should understand how delimiters work.

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The first thing I'll need you to do is create a new class by yourself inside Section three folder,

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create a new file name, delimiters Java and make sure the delimiters class has a main method.

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The delimiter separates your user input and the delimiter for user input is whitespace by default.

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So if you input three numbers separated by a white space, it takes three scanned next in methods to

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pick them up.

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Each method skips the delimiter, it skips the white space, and it picks up the next integer.

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It doesn't matter how much white space there is between each input scandal and skips the delimiter and

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it reads the next integer that you input.

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Even if you press enter many times between each input next and skips all the white space and it reads

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the next input and because next and skips the delimiter, we say that it follows the delimiter pattern.

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Next internship's the delimiter and reads the next integer value, next long skips the delimiter and

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reads the next long value.

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Next double also skips to the limiter and reads the next double value.

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Next skips the delimiter and reads the next string value.

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Hope you're ready, because we're about to write a lot of code.

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First time and ask the user to.

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NASA managers and for the sake of example, am going to ask them to write each value on the same line.

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Then I'm going to copy this.

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And ask them to enter two very big integers.

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To decimals.

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And to tax the values.

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Now we're going to pick up every value using the appropriate scanner method, so first I'm going to

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set up a new scanner right scanner, wait for the auto import.

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Skin is equal to a new skin, for instance, that can receive input from the system system in.

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First, we're going to need to scan next and methods, and no one is equal to the next integer.

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And number two is equal to the integer that follows.

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Then we're going to need to scan the next long values.

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Big no one is equal to the next long value.

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Big number two is equal to the scandal next long value.

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Now for decimals, we use next double double decimal one is equal to Scandi, next double.

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And double decimal two is equal to scandal next double.

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And finally, to pick up text we're not going to use next line, we're going to use Scandal next because

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unlike next line, each scan, the next method is going to follow the delimiter pattern.

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Such that it's going to set the delimiter, the white space that you put in between each value, it's

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going to skip that and pick up only the next value that it sees.

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All right, as always, we're going to close scanner scanned close.

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And that was a lot of code, we're almost done.

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The last thing we're going to do is print the values that scanner picks up.

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So we'll print remember, we can use the escape character to create a type of space and we'll say the

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managers are Kolan.

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No one break the string at some space between printing number one and number two.

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Now, I'm going to copy this four times.

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And here will say big integers and we'll print both numbers that we pick up.

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There will say decimals.

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And we'll print both decimals that we pick up.

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And here will say words and will print both words.

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That was a lot of code, and I'm happy to say that we're done.

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Let's run it and see what happens.

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Here, I'm going to put two integers.

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Two very big injuries.

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You decimals.

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And two words.

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And everything worked out, we successfully picked up every value and printed it.

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Each scanner method skips the delimiter, it skips the whitespace, and it picks up only the next value

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that it sees.

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It doesn't matter how much white space there is between each value, there could be 20 lines worth of

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white space.

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It skips all of it and it only picks up the next value that it sees.

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What about skin next line, scandal, next line reads the entire line, it doesn't care about delimiters,

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it reads the entire line, including all of the white space in between each value.

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If you scan the next line, it's going to read this whole line is one input.

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We're going to try this in our code.

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I'm going to replace each method with scanned next line.

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I'm going to say string numbers is equal to everything that appears in the next line.

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It's going to read every value in that line and return it as a string.

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Then we'll say string big numbers is also equal to all the values that appear in the next line.

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And we'll do the same thing for decimals.

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And string text is also going to be equal to all the values that appear in the next line.

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I'm going to rerun the code.

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Put in some values.

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This is what separates Scandi next line from every other Skinner method.

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It reads everything line by line.

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So all of this boils down to one question why exactly do we get this scandal next line trap?

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Where does it come from?

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We talked about this before.

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You will fall into this trap if you put scandal next line ahead of next into next double next long or

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scandal next.

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So we're going to delete the code we have so far or you can comment it out if you want.

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It's up to you.

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I want to start by showing you the trap and explaining why it happens.

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So I'm going to ask the user to enter a no print, please enter a no, then I'm going to pick up the

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number with scanned nexted.

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And we ask the user to enter some text.

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And I'll pick up the text with scanned next line.

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Don't forget, stand up close, I shouldn't have removed it.

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In any case, I'm going to run this code.

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And it seems to skip scan next line, or is it what's really happening is that scan next and picks up

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the number, but the line isn't over and scanned.

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The next line starts here and it says, OK, I guess this is the next line.

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So it reads the rest of the current line, which ends up being completely empty.

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So you're scanned.

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The next line is actually wasted on an empty line.

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And we can fix this issue by calling a throwaway scan next line just before our real scanned next line.

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So if we rerun this code.

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Everything works out.

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What's happening is that next in picks up the integer and the throwaway next line is wasted on the rest

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of the current line, which is empty.

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And then the following Scandi next line is ready to read all of the values on the next line.

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In this case, it reads every sentence.

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I love Java.

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These methods use the delimiter pattern to read your data scanned next and next long necks double and

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next, that is, they skip empty space and they read the next input.

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Now scan the next line doesn't care about delimiters.

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It reads everything line by line.

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And that's why it's liable to falling into a trap.

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And the trap occurs when you put Eskandar next line ahead of any method that follows the delimiter pattern

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next and next double next log or next.

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All of these methods only pick up the values that they're interested in and they leave us with an empty

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line that scan the next line is wasted on.

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And so the solution is to add a throwaway next line just before your real next line.