I could just add default implementations to the abstract class as shown in Figure 5.

像代码5这样，我可以仅仅向抽象类中添加一些默认的实现。

youdao

I could just add default implementations to the abstract class as shown in Figure 5.

像代码5这样，我可以仅仅向抽象类中添加一些默认的实现。

youdao