Call FindClass to locate a class type by name. FindClass searches the classes that the streaming system knows about. Form classes and component classes that are referenced in a form declaration (instance variables) are automatically registered with the streaming system. Other classes can be registered (with a call to RegisterClasses) so that the streaming system will recognize that class in a stream and know how to construct it.
我没看怎么懂,好像是说,只能查找到系统的类,如果想查到其它的类必须要注册!