Re: [Geotools-gt2-users] Shape file entries - String to numerical?

[Ahmed A. H. <ahm...@gm...>]

Hey Linda,
Use the code snippet below to parse the "String" number objects to get their
"int" numeric values. First, you must make sure that you are parsing
"String" numerics not just text to int primitives, otherwise, it will do you
no good to parse them. Second, you must try/catch for a
NumberFormatException in case you are reading a String that is not number.
If you know that your String numeric might exceed the range of an int, you
might want to parse for "long" primitives instead:

Now here is what you should do for parsing int primitives:
        try{
        // this will be valid and won't throw up on you
        int myInt0 = Integer.parseInt("1221");

        // this is no good and will throw up on you :-)
        int myInt1 = Integer.parseInt("23sdf");
        }catch(NumberFormatException ex){
            System.out.println(ex.getMessage());
        }

For parsing String numeric that fit "long" primitives, you should use:
long myLong = Long.parseLong("87698798798723423");

Hope this solves your issue!
Best wishes,
Ahmed


On Wed, Mar 31, 2010 at 6:04 PM, Adnila <Ad...@we...> wrote:

>
> hey guys,
> I have another question. I do not know if it is really stuff for geotools.
>
> Because the attributeName parameter from VectorToRaster.process() is
> numerical, I have to change some elements in my shape file.
>
> These are the facts:
> I have a huge amount of colums with String entries. But in reality the
> values are not Strings, but numeric entries. What now?
> I have to evaluate all entries, if there is a number in it or not. And if
> so, how to check on the elements? And then change it to some numeric
> entries?!
> Has anybody any idea how to do this with less effort?
>
> @michael: did you check already my code from
>
> http://n2.nabble.com/GridCoverage-Error-Points-of-LinearRing-do-not-form-a-closed-linestring-raster-attribute-matrix-tt4783764.html#a4783764
> .
> I send it to you via email.
>
> Thanks for your help
> Linda
>
> --
> View this message in context:
> http://n2.nabble.com/Shape-file-entries-String-to-numerical-tp4833774p4833774.html
> Sent from the geotools-gt2-users mailing list archive at Nabble.com.
>
>
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