On 1/17/2011 8:16 AM, Alexander Berkes wrote:
Hello,
I am really new to the netcdf-java library.
I am really stuck on getting the forecast times from a grib file.
Anything else works great (getting the lat/lon coordinate points,
getting the values or subsetting the grid...).
I tried the following:
------------------
String filename = "current.grb";
FmrcImpl forecasts = new FmrcImpl(filename);
List<Date> forecastDates = forecasts.getForecastDates();
for(Date d : forecastDates){
System.out.println(fd);
}
-----------------
But the above fails with a nullpointer exception on Object creation
(FmrcImpl forecasts = new FmrcImpl(filename);):
---------------------
Exception in thread "main" java.lang.NullPointerException
at ucar.nc2.dt.fmrc.FmrcImpl$Gridset.<init>(FmrcImpl.java:264)
at ucar.nc2.dt.fmrc.FmrcImpl.init(FmrcImpl.java:133)
at ucar.nc2.dt.fmrc.FmrcImpl.<init>(FmrcImpl.java:85)
at ucar.nc2.dt.fmrc.FmrcImpl.<init>(FmrcImpl.java:81)
at Test.main(Test.java:62)
---------------------
Please can anybody help me on this?
Best regards,
Alex
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Hi Alex:
Dont use FmcImpl, use GridDataset.open(filename);
see
http://www.unidata.ucar.edu/software/netcdf-java/tutorial/GridDatatype.html
for some simple examples.
