StringHelper { public static boolean equalsIgnoreCase(final String str1, final String str2) { return str1 == null ? str2 == null : str1.equalsIgnoreCase(str2); }  static String defaultString(final String str); static boolean equals(final String str1, final String str2); static boolean equalsIgnoreCase(final String str1, final String str2); static boolean isBlank(final String str); static boolean isNotBlank(final String str); static String[] split(final String str, final String separatorChars); static String substringAfterLast(final String str,
			final String separator); static final List<String> parseListPreferenceValue(
			String pRawValues, String separator); static String stripAccents(String input); static String replace(String text, String searchString,
			String replacement, int max);  }
@Test public void testEqualsIgnoreCase() { Assert.assertTrue(StringHelper.equalsIgnoreCase(null, null)); Assert.assertFalse(StringHelper.equalsIgnoreCase(null, "abc")); Assert.assertFalse(StringHelper.equalsIgnoreCase("abc", null)); Assert.assertTrue(StringHelper.equalsIgnoreCase("abc", "abc")); Assert.assertTrue(StringHelper.equalsIgnoreCase("abc", "ABC")); }