Re: 20010711: Netcdf Java problem

thanks for handling that.
BTW you should cc: to support-netcdf-java instead of / in addition to 
support-netcdf

Russ Rew wrote:

> > To: address@hidden
> > From: "Michael P Duff" <address@hidden>
> > Subject: Netcdf Java problem
> > Organization: UCAR/Unidata
> > Keywords: 200107111340.f6BDeO122826
>
>
> Hi Mike,
>
>
> > Hi.  I am having a problem with the NetCDF Java version 2.  I am reading
> > data from an existing NetCDF file using the read() function to place the
> > data into an Array. The data is stored as a double in the Netcdf file.   I
> > then use the IndexIterator to step through the Array.  I get a compile
> > error.  I am using the code I found in the API for the Interface
> > IndexIterator, the "Replace array with its square" example.  The program
> > works if I just print the values instead of put them into a variable.  I
> > have below my code, my compile error and the "Replace array with its
> > square" example.  I would appreciate any help you can give me.
> >
> > Thank you,
> >
> > Mike
> > ------------------------------------------------------------------------------------------------------------------------------
> > // My code that gets a compile error
> > import ucar.ma2.*;
> > import ucar.nc2.*;
> > import java.io.*;
> > import java.util.*;
> >
> > public class ncproblem {
> >
> >      public static void main(String[] args) {
> >           try {
> >                NetcdfFile nc = new NetcdfFile(args[0]);
> >                System.out.println(nc);
> >                Variable heightVar = nc.findVariable("height");
> >                System.out.println(heightVar);
> >                int[] origin = new int[4];
> >                origin[0] = 45000;
> >                int[] shape = new int[4];
> >                shape[0] = 50;
> >                for (int i = 1; i<4; i+=1){
> >                     origin[i] = 1;
> >                     shape[i] = 1;
> >                }
> >                Array hgtVals = heightVar.read(origin,shape);
> >                IndexIterator iter = hgtVals.getIndexIterator();
> >                while(iter.hasNext()) {
> >                     for(int i=0; i<50; i+=1) {
> >                          Double val = iter.getDoubleNext();
> >                          System.out.println(val + ",");
> >                     }
> >                }
> >           }catch (java.io.IOException e) {
> >                e.printStackTrace();
> >           }
> >      }
> > }
> > ------------------------------------------------------------------------------------------------------------------------------
> > The compile error is:
> > incompatible types
> > found      :  double
> > required:  java.lang.Double
> >                               Double val = iter.getDoubleNext();
> >                                                              ^
> > 1 error
> > ------------------------------------------------------------------------------------------------------------------------------
>
>
> Since IndexIterator.getDoubleNext() returns double rather than Double,
> you need to change this statement to:
>
>    double val = iter.getDoubleNext();
>
> After that, you'll get another compile error because the read() method
> can generate an InvalidRangeException, which is not a java.io.IOException:
>
>  ncproblem.java:23: unreported exception ucar.ma2.InvalidRangeException; must 
> be caught or declared to be thrown
>                 Array hgtVals = heightVar.read(origin,shape);
>                                          ^
> One (crude) way to handle this would be to change your catch statement to:
>
>           }catch (Exception e) {
>
> --Russ