不能直接实例化接口。

An interface cannot be instantiated directly.

youdao

永远不要直接实例化这个类，而是创建它的子类的一个实例。

You will never instantiate this class directly, but always create an instance of its subclass.

youdao

用Spring配置直接实例化自己的MBeanServer与使用各种连接器同样容易。

You can instantiate your own MBeanServer directly using Spring configuration and use a variety of connectors just as easily.

youdao

Don't go in and change the values of things by using the direct access.

也就是别这么做,别直接去访问,并改变实例中的数值。

麻省理工公开课 - 计算机科学及编程导论课程节选