### Question:
StringUtils { public static String camelize(String word) { return camelize(word, false); }  static String underscore(final String word); static String dashize(String word); static String camelize(String word); static String camelize(final String inputWord, boolean lowercaseFirstLetter); static String escape(final String name, final Map<String, String> replacementMap,
                                final List<String> charactersToAllow, final String appendToReplacement); static final String NAME_CACHE_SIZE_PROPERTY; static final String NAME_CACHE_EXPIRY_PROPERTY; }### Answer:
@Test public void testCamelize() throws Exception { Assert.assertEquals(camelize("abcd"), "Abcd"); Assert.assertEquals(camelize("some-value"), "SomeValue"); Assert.assertEquals(camelize("some_value"), "SomeValue"); Assert.assertEquals(camelize("$type"), "$Type"); Assert.assertEquals(camelize("abcd", true), "abcd"); Assert.assertEquals(camelize("some-value", true), "someValue"); Assert.assertEquals(camelize("some_value", true), "someValue"); Assert.assertEquals(camelize("Abcd", true), "abcd"); Assert.assertEquals(camelize("$type", true), "$type"); Assert.assertEquals(camelize("123", true), "123"); Assert.assertEquals(camelize("$123", true), "$123"); }