Re: help with a NetcdfDataset

Viviane Vasconcellos de Menezes wrote:

>  Hi,
>
> I was using an old version from Netcdf Java API (ucar.netcdf) to read 
> Netcdf files.
> Now, I'm doing an uptade in my program and I saw the new version from 
> Netcdf  Java API. I'm very interested  in the feature "dataset" 
> because this would do easier my job. I read the latest manual and so, 
> I decided to test it. I've got a Netcdf file that follows COARDS 
> convection (It was produced in ferret software), applied ncdump >> 
> resulting in the file .cdl,  put the attribute global 
> :Convection="COARDS" in :history header, and finally I've created 
> another nc file with ncgen.
> So, in my java program I've wrote these line commands:
>
> try {
> Netcdf nc=ucar.nc2.dataset.NetcdfDataset.factory("c:\...\BFOR.nc",null);
> NetcdfDataset ds=ucar.nc2.dataset.conv.Convection.factory(nc);
> ....
> }catch(IOException e) {JOptionPane.showMessageDialog(null,"problems 
> !!")}     
> Well, the problem is that the program stopped in the line 
> NetcdfDataset and Everything after this don't work. If I put anything 
> before this line, it works fine. I've also tried with a nc file 
> without Convection attribute and it didn't work too.
>
> Am I doing everything wrong? I need some help. Sorry for my english ...
>
> Thanks in advance
>
> Viviane
hi viviane:

in general, print error messsages like

try {
Netcdf nc=ucar.nc2.dataset.NetcdfDataset.factory("c:\...\BFOR.nc",null);
NetcdfDataset ds=ucar.nc2.dataset.conv.Convection.factory(nc);
....
}catch(IOException e) {
 e.printStackTrace();
}   

that will tell you what the error is
i think your problem are the backslashes, always use forward slashes in 
java:

"c:/.../BFOR.nc"

you may also be interested in the functionality you get from the geogrid 
package, in which case you would use:

public static GridDataset factory(java.lang.String netcdfFileURI) throws 
java.io.IOException