getField java reflection

i have a generic method in java to get fields value by reflection.

private static Object getFieldValue(Object object, final String fieldName) {

if (null == object) {
  return null;
}

Class<?> clazz = object.getClass();
while (clazz != null) {
  try {
    Field field = clazz.getDeclaredField(fieldName);
    field.setAccessible(true);
    try {
      return field.get(object);
    } catch (IllegalArgumentException e) {

      e.printStackTrace();
    } catch (IllegalAccessException e) {

      e.printStackTrace();
    }            
  } catch (NoSuchFieldException e) {
    clazz = clazz.getSuperclass();
  } 
}
return null;  

}

it works fine for simple fields name, exemple getfieldValue (project, "title"), i want to get fields values of related objects for exemple

getfieldValue (project, "task.title")