Yes, it is a class, not an interface.

是的，它是一个类，而不是一个接口。

youdao

An interesting observation is that Action is a class and not an interface.

(一个有趣的发现是，Action是类而不是接口)。

youdao

An interesting observation is that Action is a class and not an interface.

(一个有趣的发现是，Action是类而不是接口)。

youdao