CommonUtils { public static boolean isTrue(String b) { return b != null && StringUtils.TRUE.equalsIgnoreCase(b); }  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 testIsTrue() { Assert.assertTrue(CommonUtils.isTrue("true")); Assert.assertTrue(CommonUtils.isTrue("True")); Assert.assertFalse(CommonUtils.isTrue("111")); Assert.assertFalse(CommonUtils.isTrue((String) null)); Assert.assertFalse(CommonUtils.isTrue("")); Assert.assertFalse(CommonUtils.isTrue((Boolean) null)); Assert.assertTrue(CommonUtils.isTrue(Boolean.TRUE)); Assert.assertFalse(CommonUtils.isTrue(Boolean.FALSE)); }