JAVA入门第二季最后大题

不怎么满意，但在参考一位同学的代码后总算是写出来了
主程序：

package com.zuche;
import java.util.Scanner;
public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Aodi vehilcle1=new Aodi();                          //父类无法调用子类属性 
        Mazida vehilcle2=new Mazida();                      //若使用Vehicle vehilcle1=new Aodi();
        Pika vehilcle3=new Pika();                          //下面步骤无法调用子类属性的price
        Jinlong vehilcle4=new Jinlong();
        Songhuajiang vehilcle5=new Songhuajiang();
        Yiweike vehilcle6=new Yiweike();
        int sumP=0;
        int sumCP=0;
        int sumCG=0;
        int n1=0;
        int n2=0;
        int n3=0;
        do{
            System.out.println("欢迎使用答答租车系统：");
            System.out.println("您是否要租车：1是 0否");
            Scanner sc=new Scanner(System.in);
            int i=sc.nextInt();
            if (i==0){
                System.out.println("谢谢使用！");
            }else if(i!=1){
                System.out.println("输入错误，请重新输入");
            }else{
                break;
            }
            // sc.close();
        }while(true);

        System.out.println("您可租车的类型和价目表：");
        System.out.println("序号\t汽车名称\t租金\t\t载客量\t载货量");
        System.out.println("1."+"\t"+vehilcle1.name+"\t"+vehilcle1.price+"元/天"+"\t"+"\t"+vehilcle1.carryPeople+"人"+"\t"+vehilcle1.carryGoods+"吨");
        System.out.println("2."+"\t"+vehilcle2.name+"\t"+vehilcle2.price+"元/天"+"\t"+"\t"+vehilcle2.carryPeople+"人"+"\t"+vehilcle2.carryGoods+"吨");
        System.out.println("3."+"\t"+vehilcle3.name+"\t"+vehilcle3.price+"元/天"+"\t"+"\t"+vehilcle3.carryPeople+"人"+"\t"+vehilcle3.carryGoods+"吨");
        System.out.println("4."+"\t"+vehilcle4.name+"\t"+vehilcle4.price+"元/天"+"\t"+"\t"+vehilcle4.carryPeople+"人"+"\t"+vehilcle4.carryGoods+"吨");
        System.out.println("5."+"\t"+vehilcle5.name+"\t"+vehilcle5.price+"元/天"+"\t"+"\t"+vehilcle5.carryPeople+"人"+"\t"+vehilcle5.carryGoods+"吨");
        System.out.println("6."+"\t"+vehilcle6.name+"\t"+vehilcle6.price+"元/天"+"\t"+vehilcle6.carryPeople+"人"+"\t"+vehilcle6.carryGoods+"吨");
        System.out.println("请输入您要租车的数量：");
        Scanner sc2=new Scanner(System.in);
        int i2=sc2.nextInt();
        for(int j=1;i2>0;i2--,j++){
            System.out.println("请输入第"+j+"辆车的序号：");
            Scanner sc3=new Scanner(System.in);
            int i3=sc3.nextInt();

            if (i3>6){
                System.out.println("输入错误，请重新输入：");
                Scanner sc4=new Scanner(System.in);
                i3=sc4.nextInt();
            }
            switch(i3){
            case 1:
                vehilcle1.introduce();
                n1=vehilcle1.price;
                n2=vehilcle1.carryPeople;
                n3=vehilcle1.carryGoods;
                break;
            case 2:
                vehilcle2.introduce();
                n1=vehilcle2.price;
                n2=vehilcle2.carryPeople;
                n3=vehilcle2.carryGoods;
                break;
            case 3:
                vehilcle3.introduce();
                n1=vehilcle3.price;
                n2=vehilcle3.carryPeople;
                n3=vehilcle3.carryGoods;
                break;
            case 4:
                vehilcle4.introduce();
                n1=vehilcle4.price;
                n2=vehilcle4.carryPeople;
                n3=vehilcle4.carryGoods;
                break;
            case 5:
                vehilcle5.introduce();
                n1=vehilcle5.price;
                n2=vehilcle5.carryPeople;
                n3=vehilcle5.carryGoods;
                break;
            case 6:
                vehilcle6.introduce();
                n1=vehilcle6.price;
                n2=vehilcle6.carryPeople;
                n3=vehilcle6.carryGoods;
                break;  
            }
            System.out.println("借几天？");
            Scanner sc5=new Scanner(System.in);
            int i5=sc5.nextInt();
            System.out.println("借"+i5+"天");
            sumP=sumP+n1*i5;
            sumCP=sumCP+n2;
            sumCG=sumCG+n3;
        }
        System.out.println("共计金额："+sumP+"元");
        System.out.println("载客量："+sumCP+"人");
        System.out.println("载货量："+sumCG+"吨");
    }

}

车辆父类：

package com.zuche;

public abstract class Vehicle {
    String name;
    public int price;
    public int carryPeople;
    public int carryGoods;
    public abstract void introduce();

}

各种车辆子类：

package com.zuche;

public class Aodi extends Vehicle {
    public String name="奥迪Ａ４";
    public int price=500;
    public int carryPeople=4;

    @Override
    public void introduce() {
        // TODO Auto-generated method stub
        System.out.println(name);
    }

}

package com.zuche;

public class Mazida extends Vehicle {
public String name="马自达６";
public int price=400;
public int carryPeople=4;

@Override
public void introduce() {
    // TODO Auto-generated method stub
    System.out.println(name);
}

}

package com.zuche;

public class Pika extends Vehicle {
    public String name="皮卡雪６";
    public int price=450;
    public int carryPeople=4;
    public int carryGoods=2;
    @Override
    public void introduce() {
        // TODO Auto-generated method stub
        System.out.println(name);
    }

}

package com.zuche;

public class Jinlong extends Vehicle {
public String name="金龙";
public int price=800;
public int carryPeople=20;
@Override
public void introduce() {
// TODO Auto-generated method stub
System.out.println(name);
}

}

package com.zuche;

public class Songhuajiang extends Vehicle {
    public String name="松花江";
    public int price=800;

    public int carryGoods=4;
    @Override
    public void introduce() {
        // TODO Auto-generated method stub
        System.out.println(name);
    }

}

package com.zuche;

public class Yiweike extends Vehicle {
public String name="依维柯";
public int price=1000;

public int carryGoods=20;
@Override
public void introduce() {
    // TODO Auto-generated method stub
    System.out.println(name);
}

}