java 继承练习题7

public class Car {
    private final String  Pinpai="";
    
    public String getPinpai() {
        return Pinpai;
    }

    public void drive()
    {
        System.out.println("开车中");
    }
    
    

public class Aodi extends Car {

    private double jiage;
    private String xinghao;
    
    public double getJiage() {
        return jiage;
    }

    public void setJiage(double jiage) {
        this.jiage = jiage;
    }

    public String getXinghao() {
        return xinghao;
    }

    public void setXinghao(String xinghao) {
        this.xinghao = xinghao;
    }

    public void biansu()
    {
        System.out.println("速度改变");
    }
}

public class Benchi extends Car {
    private double jiage;
    private String xinghao;
    
    public double getJiage() {
        return jiage;
    }

    public void setJiage(double jiage) {
        this.jiage = jiage;
    }

    public String getXinghao() {
        return xinghao;
    }

    public void setXinghao(String xinghao) {
        this.xinghao = xinghao;
    }

    public void biansu()
    {
        System.out.println("速度改变");
    }

public class E {

    public static void main(String[] args) {
        Aodi a=new Aodi();
        a.setJiage(388888);
        System.out.println(a.getJiage());
        a.setXinghao("x5");
        System.out.println(a.getXinghao());
        a.biansu();
        Benchi b=new Benchi();
        b.setJiage(266666);
        System.out.println(a.getJiage());
        b.setXinghao("B200");
        System.out.println(a.getXinghao());
        
        b.biansu();