This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface.

该类提供了接口Set的框架实现，用来降低实现该接口的复杂程度。

youdao

This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface.

该类提供了接口Set的框架实现，用来降低实现该接口的复杂程度。

youdao