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Re: Global enums and constants

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On 2/14/12 3:10 PM, Davej wrote:
> On Feb 14, 4:53 pm, Daniel Pitts
> <newsgroup.nos...@virtualinfinity.net>  wrote:
>> On 2/14/12 2:37 PM, Davej wrote:
>>> I'm having trouble accessing constants. I know it is always best to
>>> define a constant in only one place, but public or private I still
>>> can't see it. What am I doing wrong? Thanks.
>>
>> The problem is on line 15 of the example you posted.
>>
>> In other words, we don't know what you've tried, what error messages you
>> see, or what you are really attempting to do.  Please provide an SSCCE
>> <http://sscce.org/>  and then we'll be able to help without the use of
>> clairvoyance.
>
>
> Well, I had a constant CLASSFILEPATH defined here...
>      public final String CLASSFILEPATH = "/WEB-INF/ClassList.txt";
That is not exactly a constant. It is an instance field. You're missing 
the static modifier.
This should do the trick:
    public static final String CLASSFILEPATH = "/WEB-INF/ClassList.txt";

When you add "static", it means there is exactly one CLASSFILEPATH per 
Student "class". Without the static it is per Student instance.

>   ___________________________________________________
>
> Now note that the first file has an import for the second file. Still
> the
> constant cannot be seen inside the servlets package. The error is;
>
> error: cannot find symbol
>    String path = sc.getRealPath(CLASSFILEPATH);
>    symbol:   variable CLASSFILEPATH
>    location: class CalculateGradesServlet
> 1 error

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Global enums and constants Davej <galt_57@hotmail.com> - 2012-02-14 14:37 -0800
  Re: Global enums and constants Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-02-14 14:53 -0800
    Re: Global enums and constants Davej <galt_57@hotmail.com> - 2012-02-14 15:10 -0800
      Re: Global enums and constants Patricia Shanahan <pats@acm.org> - 2012-02-14 15:24 -0800
        Re: Global enums and constants Davej <galt_57@hotmail.com> - 2012-02-14 15:54 -0800
      Re: Global enums and constants Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-02-15 08:31 -0800
        Re: Global enums and constants Lew <lewbloch@gmail.com> - 2012-02-15 09:38 -0800
          Re: Global enums and constants Roedy Green <see_website@mindprod.com.invalid> - 2012-02-15 14:52 -0800
            Re: Global enums and constants Lew <lewbloch@gmail.com> - 2012-02-15 16:28 -0800
              Re: Global enums and constants Arved Sandstrom <asandstrom3minus1@eastlink.ca> - 2012-02-15 21:30 -0400
  Re: Global enums and constants Patricia Shanahan <pats@acm.org> - 2012-02-14 15:04 -0800

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