### Question:
Pcaps { public static String dataLinkTypeToDescription( DataLinkType dlt ) throws PcapNativeException { if (dlt == null) { StringBuilder sb = new StringBuilder(); sb.append("dlt: ").append(dlt); throw new NullPointerException(sb.toString()); } return dataLinkValToDescription(dlt.value()); } private  Pcaps(); static List<PcapNetworkInterface> findAllDevs(); static PcapNetworkInterface getDevByAddress(
    InetAddress addr
  ); static PcapNetworkInterface getDevByName(
    String name
  ); static String lookupDev(); static Inet4NetworkAddress lookupNet(
    String devName
  ); static PcapHandle openOffline(
    String filePath
  ); static PcapHandle openOffline(
    String filePath, TimestampPrecision precision
  ); static PcapHandle openDead(
    DataLinkType dlt, int snaplen
  ); static PcapHandle openDead(
    DataLinkType dlt, int snaplen, TimestampPrecision precision
  ); static BpfProgram compileFilter(
    int snaplen, DataLinkType dlt, String bpfExpression,
    BpfCompileMode mode, Inet4Address netmask
  ); static DataLinkType dataLinkNameToVal(
    String name
  ); static String dataLinkTypeToName(
    DataLinkType dlt
  ); static String dataLinkValToName(
    int dataLinkVal
  ); static String dataLinkTypeToDescription(
    DataLinkType dlt
  ); static String dataLinkValToDescription(
    int dataLinkVal
  ); static String strError(int error); static String libVersion(); static String toBpfString(InetAddress inetAddr); static String toBpfString(MacAddress macAddr);  }### Answer:
@Test public void testDataLinkTypeToDescription() throws Exception { String descr = Pcaps.dataLinkTypeToDescription(DataLinkType.EN10MB); logger.info(DataLinkType.EN10MB + " descr: " + descr); assertNotNull(descr); assertFalse(descr.length() == 0); }