public class DemoCifReader {

    private static Logger logger = LoggerFactory.getLogger(DemoCifReader.class);

    public static void main(String[] args) throws Exception {
        String pdbId = "9a2f";
        boolean parseBinary = true;

        CifFile cifFile;
        if (parseBinary) {
            cifFile = CifIO.readFromURL(new URL("https://models.rcsb.org/" + pdbId + ".bcif"));
        } else {
            cifFile = CifIO.readFromURL(new URL("https://files.rcsb.org/download/" + pdbId + ".cif"));
        }
        MmCifFile mmCifFile = cifFile.as(StandardSchemata.MMCIF);

        MmCifBlock data = mmCifFile.getFirstBlock();
        AtomSite atomSite = data.getAtomSite();
        FloatColumn biso = atomSite.getBIsoOrEquiv();
        FloatColumn cartnX = atomSite.getCartnX();

        for (int i=0; i<biso.getRowCount(); i++) {
            biso.get(i);
            //cartnX.get(i);

            if (i%1000 == 0) logger.info(".");           
        }
    }
}