JAVA_继承内部类

package com.kk.innerClass;

/**
 * 继承内部类
 *
*/
public class Car {
class Wheel {

    }
}

class PlaneWheel extends Car.Wheel {

public PlaneWheel(Car car) {
        car.super();
    }

public static void main(String[] args) {
        Car car = new Car();
        PlaneWheel pw = new PlaneWheel(car);
    }
}