Read a THREDDS catalog and print dates from the first dataset found

DatesFromCatalog.java

import java.io.IOException;
import java.util.List;

import thredds.catalog.CrawlableCatalog;
import thredds.crawlabledataset.CrawlableDataset;
import ucar.nc2.dataset.CoordinateAxis1DTime;
import ucar.nc2.dataset.CoordinateSystem;
import ucar.nc2.dataset.NetcdfDataset;
import ucar.nc2.dt.grid.GridCoordSys;
import ucar.nc2.time.CalendarDate;

public class DatesFromCatalog {
    public static void main(String[] args) {
        String location = "http://sflthredds.er.usgs.gov/thredds/catalog/TSdata/surfaces/catalog.xml";
        try {
            // read the xml catalog
            CrawlableCatalog cat = new CrawlableCatalog(location, null);
            List<CrawlableDataset> datasets = cat.listDatasets();
            // get the first dataset (as an example)
            CrawlableDataset ds = datasets.get(0);
            // try to open the dataset
            try (NetcdfDataset ncd = NetcdfDataset.openDataset("thredds:"+ds.getPath())) {
                // print the title of the dataset
                System.out.println(ncd.getTitle());
                // get all coordinate systems in the dataset
                List<CoordinateSystem> coordSystems = ncd.getCoordinateSystems();
                // go through each coordinate system and look for a time axis
                for (CoordinateSystem cs : coordSystems) {
                    GridCoordSys gcs = new GridCoordSys(cs, null);
                    if (gcs.hasTimeAxis1D()) {
                        CoordinateAxis1DTime time = gcs.getTimeAxis1D();
                        List<CalendarDate> calDates = time.getCalendarDates();
                        // loop through the CalendarDate object and print each one
                        for (CalendarDate calDate : calDates) {
                            System.out.println(calDate.toString());
                        }
                    }
                }
            }
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }

}