@Test public void accessPrivateConstructorsOnStaticUtilityClasses() throws Exception { Class<?>[] classes = new Class[] { StringUtils.class, ArrayUtils.class, ClassUtils.class, CollectionUtils.class }; for (Class<?> c : classes) { Constructor<?> c1 = c.getDeclaredConstructor(); c1.setAccessible(true); c1.newInstance(); } RdfCollectionFormat.valueOf(RdfCollectionFormat.DEFAULT.toString()); XmlFormat.valueOf(XmlFormat.DEFAULT.toString()); Visibility.valueOf(Visibility.DEFAULT.toString()); } }