### Question:
Strings { public static final String unCapitalizeFirstChar(String word) { return Character.toLowerCase(word.charAt(0)) + word.substring(1); } private  Strings(); static final String capitalizeFirstChar(String word); static final String unCapitalizeFirstChar(String word);  }### Answer:
@Test public void unCapitalizeFirstChar() throws Exception { String expected = "id"; String data = "Id"; Assert.assertEquals(expected, Strings.unCapitalizeFirstChar(data)); }