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Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()?

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On 7/5/2011 2:57 PM, Thee Chicago Wolf [MVP] wrote:
>> On 7/5/2011 11:26 AM, Thee Chicago Wolf [MVP] wrote:
>>>
>>> [...] regarding the toInt() method, have a look here:
>>> http://www.iitk.ac.in/esc101/04Jul/javabookdoc/javabook/Convert.html
>>
>>      Fine: Not a part of Java, but something from a third-party
>> "javabook" package.  And, since it returns an `int', it doesn't
>> suit your requirement to convert thousand-digit strings (unless,
>> as previously remarked, nearly all of those digits are zero).
>>
>>> I simply thought that since there's a nice toString() method, SURELY
>>> in their wisdom the authors of the Java language would make its
>>> compliment as simple as well.
>>
>>      "ComplEment."  And it should be clear to you that the process
>> of converting a number to a string representation is quite different
>>from that of converting an arbitrary string to a number.  What, for
>> example, is the numeric equivalent of "1234%6789"?
>
> The numeric equivalent of "1234%6789" is PURPLE.

     Fine.  Do you now see why the string-to-number problem is an
entirely different from the number-to-string problem?  And much
more intricate, too?

> In the instance where it is a long string of numbers (no, not a whole
> bunch of zeros) and no symbols are there, it should be able to convert
> from String to an integer value just fine. Because that situation
> never happens in real life right? The limit is because you can't
> convert a string of numbers to int past 9 digits or it bombs out.

     ... and it depends on which nine digits, too: "111111111" is
just fine as an `int', while "555555555" is not.  I imagine that
your homework exercise is intended to bring you to an understanding
of this limitation, and also intended to introduce you to other
ways of representing integers than as `int' values.

> It would have been nice to have a nifty method to do this back and
> forth conversion.

     Two methods, surely.  And I hope by now you understand that
integer-to-string is a far simpler matter than string-to-integer.
(Floating-point-to-string is harder, but still simpler than
string-to-floating-point.)

> Realistically, everything is a string until you try
> and do a math op on it, right?

     I'm afraid I'm not equal to the intellectual pressure of
the conversation.

-- 
Eric Sosman
esosman@ieee-dot-org.invalid

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Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-01 12:53 -0500
  Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Jeff Higgins <jeff@invalid.invalid> - 2011-07-01 17:55 -0400
  Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? markspace <-@.> - 2011-07-01 18:19 -0700
    Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-05 10:26 -0500
      Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-07-05 13:39 -0400
        Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-05 13:57 -0500
          Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? markspace <-@.> - 2011-07-05 13:01 -0700
            Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-05 15:47 -0500
              Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? markspace <-@.> - 2011-07-05 14:57 -0700
                Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-06 13:11 -0500
                Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? markspace <-@.> - 2011-07-06 11:54 -0700
                Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-06 16:58 -0500
                Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? markspace <-@.> - 2011-07-06 15:36 -0700
                Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Patricia Shanahan <pats@acm.org> - 2011-07-06 16:53 -0700
                Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? markspace <-@.> - 2011-07-06 18:07 -0700
              Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-07-06 09:57 +0100
                Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-06 13:13 -0500
                Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Nigel Wade <nmw-news@ion.le.ac.uk> - 2011-07-07 09:43 +0100
              Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Lothar Kimmeringer <news200709@kimmeringer.de> - 2011-07-06 11:15 +0200
                Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-06 13:14 -0500
          Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-07-05 16:27 -0400
            Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Lothar Kimmeringer <news200709@kimmeringer.de> - 2011-07-06 11:22 +0200
              Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-07-06 07:33 -0400
  Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-07-01 23:06 -0400
    Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Patricia Shanahan <pats@acm.org> - 2011-07-01 20:28 -0700
    Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-05 10:27 -0500
  Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? Roedy Green <see_website@mindprod.com.invalid> - 2011-07-04 08:59 -0700
    Re: Convert a String to Int: can I use toInt() instead of Integer.parseInt()? "Thee Chicago Wolf [MVP]" <.@.> - 2011-07-05 10:30 -0500

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