StringHelper { public static String toCamelCaseSmallBegin(String s) { if (s == null) { return ""; } String ss = toCamelCase(s); return ss.substring(0, 1).toLowerCase() + ss.substring(1); } private  StringHelper(); static String toCamelCase(String s); static String toCamelCaseSmallBegin(String s); static String toOracleName(String s); static boolean isJavaKeyword(String s); static String unJavaKeyword(String s);  }
@Test public void testToCamelCaseSmallBegin() { Assert.assertEquals("helloWorld", StringHelper.toCamelCaseSmallBegin("hello_world")); Assert.assertEquals("", StringHelper.toCamelCaseSmallBegin(null)); }