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Re: i need help figuring out what is wrong in my code

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On 12/12/2016 3:28 PM, Karim omar wrote:
> [...]
> i totally got your point ,it`s because i am using nextInt() in the previous method instead of nextLine() and finInLine() is looking for a char in a string , ok i solved the issue by using finInLine() method before nextInt() call , but what if i still want the program to ask for age and get the int input then ask the yes or no question and get the char input ,how can i do it?

     Learn to read the Javadoc for the classes you use.  One of the
good features of the language is that it has built-in mechanisms for
documentation, and strongly encourages that the programmer use them.
(One of the bad features is that the documentation is written by the
programmers and not by professional writers!  This means you'll need
to read the Javadoc with a lot of care, and be alert for small hints.)

     So, we turn to the Javadoc for Scanner and read about findInLine(),
and we learn right away that there are two different methods of that
name, one taking a String argument and the other a Pattern.  You're
using the String one, and the Javadoc says it "behaves in exactly the
same way" as the other one would with a Pattern derived from the String.
Okay, fine, we can guess what's going on: The String version compiles
its argument to a Pattern and calls the Pattern version.  (Or if it
doesn't do exactly that, it does something equivalent.)

     So, we turn to the Javadoc for the Pattern-accepting version of
findInLine(), and we read (emphasis mine)

	"[...] If the pattern is found *before the next line separator,*
	the scanner [matches and returns it]."

and

	"[...] If no such pattern is detected in the input *up to the
	next line separator,* then null is returned [...]"

In other words, findInLine() searches forward from the current position
in the input, but *only within the current line;* it will not advance
to the next line.  If you need to move to a subsequent line, you'll
need to call some other Scanner method to get there; findInLine() won't
do it unaided.

     Let's see: Does Scanner have a method that moves to the next line?
We peruse the Javadoc for a while and we find a method that

	"Advances this scanner past the current line and returns the
	input that was skipped. [...] The position is set to the
	beginning of the next line."

... and Lo! it turns out to be a method you're already familiar with!
Perhaps if you used that method before findInLine(), things might go
more smoothly.  Care to try it?

-- 
esosman@comcast-dot-net.invalid
"Nobody ever went broke underestimating the intelligence of the
American public." -- HLM (paraphrased)

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i need help figuring out what is wrong in my code Karim omar <karimyousrymohamedomar@gmail.com> - 2016-12-12 08:13 -0800
  Re: i need help figuring out what is wrong in my code Karim omar <karimyousrymohamedomar@gmail.com> - 2016-12-12 08:15 -0800
    Re: i need help figuring out what is wrong in my code Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-12-12 11:27 -0500
  Re: i need help figuring out what is wrong in my code Karim omar <karimyousrymohamedomar@gmail.com> - 2016-12-12 08:54 -0800
    Re: i need help figuring out what is wrong in my code Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-12-12 12:02 -0500
      Re: i need help figuring out what is wrong in my code Karim omar <karimyousrymohamedomar@gmail.com> - 2016-12-12 09:06 -0800
        Re: i need help figuring out what is wrong in my code Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-12-12 12:40 -0500
          Re: i need help figuring out what is wrong in my code Karim omar <karimyousrymohamedomar@gmail.com> - 2016-12-12 09:52 -0800
            Re: i need help figuring out what is wrong in my code Eric Douglas <e.d.programmer@gmail.com> - 2016-12-12 10:21 -0800
            Re: i need help figuring out what is wrong in my code Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-12-12 13:36 -0500
              Re: i need help figuring out what is wrong in my code Karim omar <karimyousrymohamedomar@gmail.com> - 2016-12-12 12:28 -0800
                Re: i need help figuring out what is wrong in my code Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-12-12 16:28 -0500
                Re: i need help figuring out what is wrong in my code Karim omar <karimyousrymohamedomar@gmail.com> - 2016-12-12 13:39 -0800
                Re: i need help figuring out what is wrong in my code Karim omar <karimyousrymohamedomar@gmail.com> - 2016-12-12 14:17 -0800
                Re: i need help figuring out what is wrong in my code Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-12-12 18:08 -0500
      Re: i need help figuring out what is wrong in my code Karim omar <karimyousrymohamedomar@gmail.com> - 2016-12-12 09:09 -0800
  Re: i need help figuring out what is wrong in my code lewbloch@gmail.com - 2016-12-13 12:38 -0800
    Re: i need help figuring out what is wrong in my code Eric Douglas <e.d.programmer@gmail.com> - 2016-12-13 12:49 -0800
      Re: i need help figuring out what is wrong in my code lewbloch@gmail.com - 2016-12-14 17:01 -0800
        Re: i need help figuring out what is wrong in my code Martin Gregorie <martin@address-in-sig.invalid> - 2016-12-15 10:47 +0000
  Re: i need help figuring out what is wrong in my code Roedy Green <inquiry@mindprod.com> - 2016-12-13 16:07 -0800

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