oop.修饰词/内部类/重写

package oo.day05;
//内部类演示
public class InnerDemo {
    public static void main(String[] args) {
        Mama m = new Mama();
        //Baby b = new Baby(); //编译错误，内部类对外不具备可见性
    }
}

class Mama{ //外部类
    private String name;
    Baby createBaby(){
        return new Baby();
    }
    class Baby{ //内部类
        void showMamaName(){
            System.out.println(name); //简略写法
            System.out.println(Mama.this.name);
            //System.out.println(this.name); //编译错误
        }
    }
}