java - 将嵌套类继承到子类

Question

当我浏览 this 时文章，在 Private Members in a Superclass 部分下，我看到了这一行

A nested class has access to all the private members of its enclosing class—both fields and methods. Therefore, a public or protected nested class inherited by a subclass has indirect access to all of the private members of the superclass.

我的问题是我们如何直接访问 Derived 中 Base 的 Nested 类(就像我们可以访问任何 public, protected 字段)？

和

如果有办法，Derived如何通过Nested访问Base的私有(private)字段p ？

public class Base {

    protected int f;
    private int p;

    public class Nested {

        public int getP() {
            return p;
        }
    }
}

class Derived extends Base {

    public void newMethod() {
        System.out.println(f); // i understand inheriting protected field

        // how to access the inherited Nested class here? and if accessed how to retrieve 'p' ?
    }

}

在此先感谢您为此主题付出的时间和精力!

Answer 1

Base.Nested theClassBro= new Base.Nested();

或者对于派生类，这应该有效:

Derived.Nested theClassBro= new Derived.Nested();

我不确定你是否需要使用 super 关键字