没有实现接口的所有方法。可能吗？ [英] not implementing all of the methods of interface. is it possible?

问题描述

有没有办法 NOT 实现继承类中接口的所有方法？

Is there any way to NOT implement all of the methods of an interface in an inheriting class?

推荐答案

解决这个问题的唯一方法是将您的类声明为 abstract ，并将其保留为子类以实现缺少的方法。但最终，链中的某个人必须实现它以满足接口合同。如果你真的不需要特定的方法，你可以实现它，然后返回或抛出一些 NotImplementedException ，在你的情况下哪个更合适。

The only way around this is to declare your class as abstract and leave it to a subclass to implement the missing methods. But ultimately, someone in the chain has to implement it to meet the interface contract. If you truly do not need a particular method, you can implement it and then either return or throw some variety of NotImplementedException, whichever is more appropriate in your case.

接口也可以指定一些方法为'default'并在接口定义中提供相应的方法实现（ https://docs.oracle.com/javase/tutorial/java/IandI/defaultmethods。 HTML ）。实现接口时无需提及这些默认方法。

The Interface could also specify some methods as 'default' and provide the corresponding method implementation within the Interface definition (https://docs.oracle.com/javase/tutorial/java/IandI/defaultmethods.html). These 'default' methods need not be mentioned while implementing the Interface.

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