首先定义了父类Car；

然后定义了多个子类，如Aodi；

为了后续录入车辆时，同类车型只需录入型号，不再录入车名，所以在子类中定义了final变量“”“奥迪”；但运行的结果却是车名name永远为空，无法读取如“奥迪”等信息。

请问我错在了哪里？？？

代码如下：

package com.imook2;

public class Car {
 public int No;
 public String Name;
 public String Xinghao;
 public float Price;
 public String Type;
 public int TypeNo;
 public int Carring;
 public int CarringNo;
 public String CarringDanwei;
 public void DoType(){
  if(TypeNo==1){
  Type="载人";
 }else if(TypeNo==2){
  Type="载物";
 }else{
  System.out.println("输入有误！");
 }
}
 public void DoCarringDanwei(){
  if(CarringNo==1){
   CarringDanwei="p";
 }else if(CarringNo==2){
  CarringDanwei="t";
 }else{
  System.out.println("输入有误！");
 }
}
 public void out(){
  System.out.println(No+".  "+Name+Xinghao+"  "+Price+"元/天        "+Type+":"+Carring+CarringDanwei);
 }
}

package com.imook2;

public class Aodi extends Car {
 public int No;
 final public String Name="奥迪";
 public String Xinghao;
 public float Price;
 public String Type;
 public int TypeNo;
 public int Carring;
 public String CarringDanwei;
 public int CarringNo;
 
}

package com.imook2;

public class Initail {

 public static void main(String[] args) {
  // TODO 自动生成的方法存根
    Car car1=new Aodi();
    Car car2=new Pickup();
    Car car3=new Songhuajiang();
    Car car4=new Golden();
    Car car5=new Mzd();
   // car1.Name="奥迪";
    car1.No=1;
    car1.Xinghao="A4";
    car1.Price=500;
    car1.TypeNo=1;
    car1.Carring=4;
    car1.CarringNo=1;
    car2.No=2;
    car2.Xinghao="";
    car2.Price=250;
    car2.TypeNo=2;
    car2.Carring=80;
    car2.CarringNo=2;
    car3.No=3;
    car3.Xinghao="12";
    car3.Price=350;
    car3.TypeNo=1;
    car3.Carring=7;
    car3.CarringNo=1;
    car4.No=4;
    car4.Xinghao="V8";
    car4.Price=1500;
    car4.TypeNo=1;
    car4.Carring=45;
    car4.CarringNo=1;
    car5.No=5;
    car5.Xinghao="6";
    car5.Price=400;
    car5.TypeNo=1;
    car5.Carring=4;
    car5.CarringNo=1;
    car1.DoType();
    car1.DoCarringDanwei();
    car2.DoType();
    car2.DoCarringDanwei();
    car3.DoType();
    car3.DoCarringDanwei();
    car4.DoType();
    car4.DoCarringDanwei();
    car5.DoType();
    car5.DoCarringDanwei();
    System.out.println("序号       型号        价格         载人/载物          载重量");
    car1.out();
    car2.out();
    car3.out();
    car4.out();
    car5.out();
 }

}

运行结果：

序号       型号        价格         载人/载物          载重量
1.  nullA4  500.0元/天        载人:4p
2.  null  250.0元/天        载物:80t
3.  null12  350.0元/天        载人:7p
4.  nullV8  1500.0元/天        载人:45p
5.  null6  400.0元/天        载人:4p