Util { public static String getHostname() { try { Field implField = InetAddress.class.getDeclaredField("impl"); implField.setAccessible(true); Object impl = implField.get(null); Method method = impl.getClass().getDeclaredMethod("getLocalHostName"); method.setAccessible(true); return (String) method.invoke(impl); } catch (Exception e) { throw new RuntimeException(e); } } private  Util(); static String generateUUID(); static String generateDbUUID(); static Set<T> asSet(T... values); static Date tomorrow(); static Date yesterday(); static Date midnight(); static Date addDaysToDt(int dayField); static Date addMinutesToDt(int minuteField); static Date toDate(String dt); static T assertNotNull(T value, String message); static boolean equals(String str, String str1); static void closeSafely(Object closable, String msg); static String capitalize(String str); static long generateUniqueLong(); static String toBase64(byte[] data); static SimpleDateFormat getUTCDateFormat(); static String readFile(InputStream is); static String hash(String password); static String toJson(Object anObject); static T fromJson(String json, Class<T> clazz); @SuppressWarnings("rawtypes") static String getClassName(Class c); static String getClassName(String fullClassName); static String reverseEndian(String in); static String transformUuid(String uuid); static List<String> getPossibleUuids(String... ids); static boolean isUuid(String uuid); static String collectionToString(Collection c); static boolean collectionsAreEqual(Collection<T> c1, Collection<T> c2); static boolean collectionsAreEqual(Collection<T> c1, Collection<T> c2, Comparator<T> comp); static String getHostname(); static final String UTC_STR; }
@Test public void testGetHostname() { try { String hostname = Util.getHostname(); assertNotNull(hostname); } catch (Exception e) { fail("getHostname should not throw an exception"); } }