### Question:
ClassUtil { public static Field getDeclaredField(Class<?> cls, String name) throws NoSuchFieldException{ for(; cls != null && cls != Object.class; cls = cls.getSuperclass()){ try{ return cls.getDeclaredField(name); }catch(NoSuchFieldException e){ } } throw new NoSuchFieldException(name); }  @Deprecated //Used only for testing, don't use in production code @SneakyThrows static void setStaticPrivateField(String className, String fieldName, Object value); @Deprecated //Used only for testing, don't use in production code static void setPrivateField(Object obj, String fieldName, Object value); @Deprecated //Used only for testing, don't use in production code @SneakyThrows static void setPrivateField(Class<?> cls, Object obj, String fieldName, Object value); static Field getDeclaredField(Class<?> cls, String name); static Map<String, BeanProperty> getProperties(Class<?> cls); static Object getObjectByPath(String path); static Object getObjectByPath(Class<?> cls, Object obj, List<String> relativePath); static Object getObjectProperty(Class<?> cls, Object obj, String propertyName); static Class<?> getGenericClass(Type type); static Type[] getGenericTypeActualParams(Type type); static Type[] getGenericTypeActualParamsForInterface(Type type, Class<?> intf); static List<Class<?>> getAllInterface(Class<?> cls); static Class<?> findInterface(Class<?> cls, Class<?> itf); static Field[] getAllFields(Class<?> cls); static Method[] getAllMethods(Class<?> cls); static T stringToEnum(Class<T> cls, String str); @SuppressWarnings({ "unchecked", "rawtypes" }) static T stringToSimpleObject(String str, Class<T> cls, BeanConvertContext ctx); static boolean isSimpleType(Class<?> cls); static Object objectToSimpleType(Object obj, Class<?> cls); static Type getType(String typeName); static StackTraceElement findCallerStackTrace(Class<?> calleeClass); static final Type[] EMPTY_TYPE_ARRAY; static final Map<String, Class<?>> PRIMITIVE_TYPE_MAP; }### Answer:
@SneakyThrows @Test public void testGetDeclaredField() { Field field = ClassUtil.getDeclaredField(TestSubClass.class, "privateFinalField"); assertEquals("privateFinalField", field.getName()); }