CommonUtils { public static long parseLong(String num, long defaultLong) { if (num == null) { return defaultLong; } else { try { return Long.parseLong(num); } catch (Exception e) { return defaultLong; } } }  static V putToConcurrentMap(ConcurrentMap<K, V> map, K key, V value); static boolean isTrue(String b); static boolean isTrue(Boolean b); static boolean isFalse(Boolean b); static boolean isFalse(String b); static boolean isEmpty(Collection collection); static boolean isNotEmpty(Collection collection); static boolean isEmpty(Map map); static boolean isNotEmpty(Map map); static boolean isEmpty(Object[] array); static boolean isNotEmpty(Object[] array); static T parseNum(T num, T defaultInt); static int parseInt(String num, int defaultInt); static long parseLong(String num, long defaultLong); static boolean parseBoolean(String bool, boolean defaultInt); static int[] parseInts(String nums, String sperator); static boolean listEquals(List<T> left, List<T> right); static String join(Collection collection, String separator);  }
@Test public void testParseLong() { Assert.assertEquals(CommonUtils.parseLong("", 123L), 123L); Assert.assertEquals(CommonUtils.parseLong("xxx", 123L), 123L); Assert.assertEquals(CommonUtils.parseLong(null, 123L), 123L); Assert.assertEquals(CommonUtils.parseLong("12345", 123L), 12345L); }