ReflectionUtil.java

public class ReflectionUtil {

    public static Object getField(Object object, String strName) throws NoSuchFieldException, IllegalAccessException {
        if(object == null || object.getClass() == null) return null;
        Field field = object.getClass().getField(strName);
        return field.get(object);
    }

    public static Object getDeclaredField(Object obj, String name)
            throws SecurityException, NoSuchFieldException,
            IllegalArgumentException, IllegalAccessException {
        Field f = obj.getClass().getDeclaredField(name);
        f.setAccessible(true);
        return f.get(obj);
    }

    public static void setValueToDeclaredField(Object obj, String name, Object value)
            throws SecurityException, NoSuchFieldException,
            IllegalArgumentException, IllegalAccessException {

        Field f = obj.getClass().getDeclaredField(name);
        f.setAccessible(true);
        f.set(obj, value);

    }



    public static void setValueToDeclaredFieldFromSuperClass(Object obj, String name, Object value)
            throws SecurityException, NoSuchFieldException,
            IllegalArgumentException, IllegalAccessException {
        Field f = getFieldFromSuperClass(obj.getClass(), name);
        f.setAccessible(true);
        f.set(obj, value);

    }
    public static Field getFieldFromSuperClass(Class clazz, String fieldName)
            throws NoSuchFieldException {
        Field field = null;
        while (clazz != null) {
            try {
                field = clazz.getDeclaredField(fieldName);
                break;
            } catch (NoSuchFieldException e) {
                clazz = clazz.getSuperclass();
            }
        }

        if (field == null) {
            throw new NoSuchFieldException();
        }
        return field;
    }
}