继承内部类

package test2;

public class InheritInner extends WithInner.Inner {

    //No enclosing instance of type WithInner is available due to some intermediate constructor invocation
    private WithInner.Inner wi;
    InheritInner(WithInner wi){
        
    //调用父类构造器，必须是第一句。形式上与通常的有点不一样（一般的为 super()，这里多了个outterclass的reference  outterclass.super()）。
        wi.super();        
        this.wi=wi.new Inner();        //初始化InheritInner对象
    }
    public int i=2;
    public void prt(){System.out.println(super.i);}
    
    
    public static void main(String[] args) {
        
        InheritInner ii=new InheritInner(new WithInner());
        
        System.out.println(ii.wi);        //test2.WithInner$Inner@8ee016
        System.out.println(ii.i);        //2
        ii.prt();                        //1
        
    }
    
    
    
    
}

class WithInner{
    class Inner{
        public int i=1;
    }
    private Inner in;
    WithInner(){
        in=this.new Inner();    //外部类new内部类 ，初始化外部类对象
    }
}