In the Indexed Access Method,a method of indicating that a record or block is in use and is not available for another request. 在索引存取方法中,指明一个记录或数据块处于使用之中而且不再接受另一个使用请求的一种方法。
Accessor methods allow access to private member variables, but in a controlled manner. 存取方法允许访问静态成员变量,但仅能在控制方式中。