Java callback function

Excerpt from the network:

    callback function: A calls B, and passes A to B. b executes the method (callback) that invokes a.
   is to: A initiates a call b,b handles some things, and then calls back some of the actions of a.
   Relationship: A and B are association relationships.

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

This class is equivalent to B (B executes the method that invokes a ).

public class  Caller {   

Private  Mycallinterface Callinterface; Receiving an object that implements an interface

public void Setcallfunc (Mycallinterface callinterface) {

This  . callinterface = Callinterface;

      }  

Public void call () {///callback function

Callinterface.printname ();

}

  }

----interface

public interface   mycallinterface {  

Public   void printname ();

}

---is equivalent to Class A, and is called a Class B callback.

public class  Client  implements   mycallinterface {    

public void  printName ()   {  

System.out.println ("This is theclient Printname method");

}

}

-----Callbacks start to matter

public class  Test {   

     public static void

Caller Caller = new Caller ();

Caller.setcallfunc (new Client ()); Implements the specific object of the interface as a parameter

Caller.call (); To invoke a specific method in a parameter

}

}

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Java callback function