如何分辨何时调用接口中的方法

Question

I'm looking to tell when one specific method in an interface is called, given a simple interface:

public interface Foo {
  String bar();
  int foobar();
}

I want to be able to do something when bar() is called in another class, but I want to let other classes implement Foo and @Override its methods.

Remember that I can't edit the class Foo .

Answer 1

If you want just call some code before or after calling bar implementation, i think it is possible by using AOP (aspect oriented programming) and AspectJ. You can use this topic : http://www.yegor256.com/2014/06/01/aop-aspectj-java-method-logging.html

Answer 2

您不能，接口确实是盲目的，它们无法检查谁在实现其方法。