public class Car {

     private final String PinPai;

     public String getPinPai(){

         return PinPai;

     }

     public void drive(){

         System.out.println("我可以行驶。");

     }

     public Car(String pinpai){

         PinPai=pinpai;

     }

 }

 public class Aodi extends Car {

     public double price;

     public String xinghao;

     public void biansu() {

         System.out.println("速度改变");

     }

     public Aodi() {

         super("奥迪");

     }

     public void Aodi(double price, String xinghao) {

         this.price = price;

         this.xinghao = xinghao;

     }

     @Override

     public String toString() {

         return "Aodi [PinPai=" + getPinPai() + ", price=" + price + ", xinghao=" + xinghao + "]";

     }

 }

 public class BenChi extends Car{

     public double price;

     public String xinghao;

     public void biansu(){

         System.out.println("速度改变");

     }

     public BenChi(){

         super("奔驰");

     }

     public void BenChi(double price, String xinghao){

         this.price=price;

         this.xinghao=xinghao;

     }

     @Override

     public String toString() {

         return "BenChi [PinPai=" + getPinPai() + ", price=" + price + ", xinghao=" + xinghao + "]";

     }

 }

     public static void main(String[] args) {

         Aodi ad = new Aodi();

         ad.Aodi(400000, "A6");

         ad.biansu();

         System.out.println(ad.toString());

         BenChi bc = new BenChi();

         System.out.println(bc.getPinPai());

         bc.BenChi(350000, "Benze S—500");

         System.out.println(bc.toString());

     }