Java入门第二季 答答租车系统

仿照着Java入门第二季 答答租车系统做了一个租车系统
感觉这个妹子敲厉害啊，第一次写就写的这么好。
自己学了这么久的java一点长进都木有
嘤嘤嘤，人与人之间的差距怎么这么大。
没用到接口和泛型，因为实在不会.......

所以定义了抽象父类Car

package com.carrent;

/***********************************************************************
 * Module:  Car.java
 * Author:  jmh
 * Purpose: Defines the Class Car
 ***********************************************************************/

import java.util.*;

/** @pdOid 0297049e-bed2-4b40-ab64-3d6cde5eff95 */
public abstract class Car {

       private String name;
       private int price;

       public Car(String name,int price){
           this.name=name;
           this.price=price;

       }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getPrice() {
        return price;
    }

    public void setPrice(int price) {
        this.price = price;
    }

    @Override
    public String toString() { 
        return this.getName()+"\t" +this.getPrice() ; }

}

然后三个子类继承父类，再扩充方法和变量

//客车
package com.carrent;
import java.util.*;

public class Bus extends Car {
    private int people; 
       public Bus(String name, int price,int people) {
        super(name, price);
        this.people=people;
        // TODO Auto-generated constructor stub
    }

    public int getPeople() {
        return people;
    }
    public void setPeople(int people) {
        this.people = people;
    }
    @Override
    public String toString() { 
        return super.toString()  +  "\t载人：" + this.getPeople()+ "人"; }

}

//货车
package com.carrent;
import java.util.*;

/** @pdOid f7031a2c-e185-4148-8115-786c306def38 */
public class Trunk extends Car {
     private int goods;    
    public Trunk(String name, int price,int goods) {
        super(name, price);
        this.goods=goods;
        // TODO Auto-generated constructor stub
    }

    public int getGoods() {
        return goods;
    }
    public void setGoods(int goods) {
        this.goods = goods;
    }
    @Override
    public String toString() { 
        return super.toString() +  "\t载货：" + this.getGoods() + "吨"; }

}

//皮卡车
package com.carrent;
import java.util.*;

public class Pickup extends Car {
    private int people;
    private int goods;
        public Pickup(String name, int price,int people,int goods) {
        super(name, price);
        this.people=people;
        this.goods=goods;
        }
        public int getPeople() {
            return people;
        }
        public void setPeople(int people) {
            this.people = people;
        }
        public int getGoods() {
            return goods;
        }
        public void setGoods(int goods) {
            this.goods = goods;
        }
        @Override
        public String toString() { 
            return super.toString() +  "\t载人：" + this.getPeople()+ "人"+ "\t载货：" + this.getGoods()+ "吨"; }

}

异常处理学的不大好，其实我希望是输入错误以后能够重新输入而不是直接停止运行的，但是不知道该怎么做......
主程序入口：

package com.carrent;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class main {
    static int carnums=6;
    public static void main(String args[]){ 
     System.out.print("是否租车：");
     System.out.println("【1】是【0】否");
     Scanner input = new Scanner(System.in);
     int n=3;
     try{
        n=input.nextInt();
     }catch(Exception e){   
     System.out.println("输入错误！请重新输入。");
    } 
    if(n==1){
         //输出价目表1
         System.out.println("你可租车的类型及其价目表：");
         System.out.println("序号\t汽车名称\t租金\t容量");
         Car[] car=initcar();
         System.out.println("-----------------------");
         int[][] num=new int[2][car.length];
         int price=0;
         for( int i=0;i<car.length;i++){
         System.out.println("序号"+(i+1) +"   "+ car[i].toString()); 
         System.out.println("请输入要租第"+(i+1)+"种车的数量：（不租车的话请输入0）");
         Scanner carnum = new Scanner(System.in); 
         try{
             num[0][i]=carnum.nextInt();
         }catch(Exception e){
             System.out.println("输入错误！退出系统...");

         }
         if(num[0][i]==0) continue;
         System.out.println("请输入要租车的天数：");
         Scanner day = new Scanner(System.in);
         try{
             num[1][i]=day.nextInt();
         }catch(Exception e){
             System.out.println("输入错误！退出系统...");}
        price=price+num[0][i]*num[1][i]*car[i].getPrice();
         }
         //打印订单
         printOrder(car,num);
     }

     else if(n==0){
         System.out.print("感谢您的使用！");   
     }

    }

    public static Car[] initcar(){

    Car[] car =new Car[carnums];
    car[0]=new Bus("奥迪A4", 500, 4);
    car[1]=new Bus("马自达6", 400, 4);
    car[2]=new Pickup("皮卡雪6", 450, 4, 2);
    car[3]=new Bus("金龙", 800, 20);
    car[4]=new Trunk("松花江", 400, 4);
    car[5]=new Trunk("依维柯", 1000, 20);

   //将数组中的值转换成string类型再打印输出
        for (int i1 = 0; i1 < car.length; i1++) { 
        System.out.println((i1+1) + "\t" + car[i1].toString()); 
        }
        return car;
} 
    public static void printOrder(Car[] carList, int[][] carNumber)
    {

        int rentSum = 0,rent=0; 
        System.out.println(); 
        System.out.println("--------------------------------------"); 
        System.out.println("您的订单："); 
        System.out.println("汽车名称\t数量\t天数\t每日租金\t总租金"); 
        for(int i = 0; i < carList.length; i++)
        {
            for(int j = 0; j < carNumber[1].length; j++)
            { 
            rent=carList[i].getPrice()*carNumber[1][i]*carNumber[0][i];
            } 
            rentSum+=rent; 
            System.out.println(carList[i].getName() + "\t" + carNumber[0][i] + "\t" + carNumber[1][i] + "\t" + carList[i].getPrice() + "\t" +rent );    
        }
        System.out.println("------------------------------------"); 
        System.out.println("\t\t\t总金额(￥):" +rentSum); 
    }

}

最后运行结果