Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.java.programmer > #18732

Re: can't return value

Show key headers only | View raw

"Stuart" <DerTopper@web.de> wrote in message 
news:k2s2vb$jr5$1@dont-email.me...
> bilsch wrote in his first posting:
>> I want to get variable lastName for use in the main method (the whole
>> program isn't shown). I want to return it from inside the IF block within
>> the FOR loop.
>
> [snipped various replies]
>
> On 9/13/12 bilsch wrote:
>> Based on what Jukka said I got it to work without using the for loop.
>> OK. Now I see what Jukka meant by initializing to NULL.  But I don't
>> know what exception to throw for 'misssing return statement'.  Also I
>> don't know how to put it in.
>
> What Jukka probably meant to say is that you could throw an exception in 
> case your method could not extract a surname from the passed string. Like 
> so:
>
>
> public static String lastName(String wholeName){
>
>      for (int i = 0; i < wholeName.length(); i++){
>          if (wholeName.charAt(i)== ' '){
>             return wholeName.substring(i + 1);
>          }
>      }
>      // If we reach this line, the parameter
>      // wholeName cannot have contained a
>      // blank, so we cannot extract the last
>      // name.
>      throw new exception ("cannot find lastname");
> }
>
> Alternatively, your method can simply return null:
>
> public static String lastName(String wholeName){
>
>      for (int i = 0; i < wholeName.length(); i++){
>          if (wholeName.charAt(i)== ' '){
>             return wholeName.substring(i + 1);
>          }
>      }
>      // If we reach this line, the parameter
>      // wholeName cannot have contained a
>      // blank, so we cannot extract the last
>      // name.
>      return null;
> }
>
>
> Which of these variants suits you better depends on how you want to use 
> lastName. Both have their advantages and disadvantages.
>
> Regards,
> Stuart

Thanks for the info.  I can't experiment with it right now.  I'll post 
later. 

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

can't return value "bilsch" <king621@comcast.net> - 2012-09-12 00:36 -0700
  Re: can't return value Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-09-12 07:11 -0400
    Re: can't return value bilsch <bilsch01@gmail.com> - 2012-09-12 22:15 -0700
      Re: can't return value Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-09-13 08:53 -0400
  Re: can't return value Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2012-09-12 15:32 +0300
    Re: can't return value bilsch <bilsch01@gmail.com> - 2012-09-12 22:37 -0700
      Re: can't return value Lew <lewbloch@gmail.com> - 2012-09-12 23:17 -0700
        Re: can't return value markspace <-@.> - 2012-09-13 01:11 -0700
          Re: can't return value Lew <lewbloch@gmail.com> - 2012-09-13 10:53 -0700
      Re: can't return value Stuart <DerTopper@web.de> - 2012-09-13 09:45 +0200
        Re: can't return value "bilsch" <king621@comcast.net> - 2012-09-13 03:55 -0700
        Re: can't return value Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2012-09-13 15:06 +0300
          Re: can't return value Stuart <DerTopper@web.de> - 2012-09-13 20:53 +0200
  Re: can't return value Roedy Green <see_website@mindprod.com.invalid> - 2012-09-12 20:54 -0700

csiph-web