也不知道我理解的对不对，欢迎大家讨论！

自己写了个钩子函数，我理解的钩子函数：

public interface Transactioner {


String wedontknow() ;</br></br>


}

public abstract class GouZi  {


<span style="color:#000080;font-weight:bold;">public abstract void </span><span style="background-color:#e4e4ff;">gouzi</span>(Transactioner t);</br></br>


}

public class Test extends GouZi{



    public static void main(String []s){


        Test t = new Test();


        t.gouzi(new Transactioner() {


            @Override


            public String wedontknow() {


                return "this is from Transactioner---wedontknow";


            }


        });


    }



    @Override


    public void gouzi(Transactioner t) {


        System.out.println("This is from gouzi function");


        System.out.print(t.wedontknow());


    }


}



===============

运行结果：


This is from gouzi function


this is from Transactioner---wedontknow