java-向字段添加匿名类

Question

我试图理解在Java中使用匿名类。基本上我已经在方法中创建了一个匿名类，即testAnonymous，那么如何将匿名类作为字段添加到其父类MyClass？

我的代码肯定存在问题。我也在下面评论过。希望有助于解释这个问题。我无法理解这一点。谢谢你的帮助！

public class MyClass {
     private int number;
     private String name;
     private Greeting greeting; //the anonymous class FrenchGreeting extends Greeting
     // so is this the way to add the instance of anonymous class? 
     ...
     public void sayHi(){
         Greeting frenchGreeting= new Greeting(){ //created an anonymous class 
            //override some method in Greeting, to make it a french greeting
          }
         frenchGreeting.greet();//why can't I use the method in Greeting class here? 
     }