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Java第二季租车系统要求的功能基本实现。若有不足，请多指教！

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Java

创建了两个接口IPeopleCapacity（具有载客容量）、ICargoCapacity（具有载货容量）；一个父类Vehicle代表车辆具有序号、名字、租用价钱属性，三个子类Car汽车（只载人）、Truck货车（只载货）、Pickup皮卡（能载人也能载货）。程序做了部分注释。希望可以多多交流。请多指教！

IPeopleCapacity.java

package com.imooc;
//创建接口IPeopleCapacity，具有载人容量
public interface IPeopleCapacity {
    public int getPeopleCapacity();
}

ICargoCapacity.java

package com.imooc;
//创建接口ICargoCapacity，具有载货容量
public interface ICargoCapacity {
    public int getCargoCapacity();
}

Vehicle.java

package com.imooc;
//创建父类Vehicle，子类将拥有父类所有的方法和属性
public class Vehicle {
    public int id;
    public String name;
    public int rentPrice;
}

Car.java

package com.imooc;
//创建子类Car汽车，继承父类Vehicle，且遵守接口IPeopleCapacity具有载人容量
public class Car extends Vehicle implements IPeopleCapacity{
    public int peopleNum;
    public Car(int id,String name,int rentPrice,int peopleNum) {
        this.id=id;
        this.name=name;
        this.rentPrice=rentPrice;
        this.peopleNum=peopleNum;
    }
    public String toString() {
        return id+"\t"+name+"\t"+rentPrice+"元/天\t"+peopleNum+"人";
    }
    @Override
    public int getPeopleCapacity() {
        // TODO Auto-generated method stub
        return peopleNum;
    }
}

Truck.java

package com.imooc;
//创建子类Truck货车，继承父类Vehicle，且遵守接口ICargoCapacity具有载货容量
public class Truck extends Vehicle implements ICargoCapacity{
    public int cargoWeight;
    public Truck(int id,String name,int rentPrice,int cargoWeight) {
        this.id=id;
        this.name=name;
        this.rentPrice=rentPrice;
        this.cargoWeight=cargoWeight;
    }
    public String toString() {
        return id+"\t"+name+"\t"+rentPrice+"元/天\t"+cargoWeight+"吨";
    }
    @Override
    public int getCargoCapacity() {
        // TODO Auto-generated method stub
        return cargoWeight;
    }
}

Pickup.java

package com.imooc;
//创建子类Pickup皮卡，继承父类Vehicle，且遵守接口IPeopleCapacity和ICargoCapacity具，有载人容量和载货容量
public class Pickup extends Vehicle implements ICargoCapacity,IPeopleCapacity{
    public int peopleNum;
    public int cargoWeight;
    public Pickup(int id,String name,int rentPrice,int peopleNum,int cargoWeight) {
        this.id=id;
        this.name=name;
        this.rentPrice=rentPrice;
        this.peopleNum=peopleNum;
        this.cargoWeight=cargoWeight;
    }
    public String toString() {
        return id+"\t"+name+"\t"+rentPrice+"元/天\t"+peopleNum+"人,"+cargoWeight+"吨";
    }
    @Override
    public int getPeopleCapacity() {
        // TODO Auto-generated method stub
        return peopleNum;
    }
    @Override
    public int getCargoCapacity() {
        // TODO Auto-generated method stub
        return cargoWeight;
    }
}

Test.java

package com.imooc;
import java.util.Scanner;
public class Test {
    int rentSum=0;//总租金
    int peopleSum=0;//总载客数
    int cargoSum=0;//总载货数
    String peopleVehicle="",cargoVehicle="";//所租用的载人车型和载客车型
    public void method() {
        // TODO Auto-generated method stub
        //通过父类Vehicle的引用指向子类Car、Pickup、Truck的对象，存放在Vehicles[]数组中
        Vehicle[] Vehicles= {new Car(1,"奥迪A4",500,4),
                            new Car(2,"马自达6",400,4),
                            new Pickup(3,"皮卡雪6",450,4,2),
                            new Car(4,"金龙",800,20),
                            new Truck(5,"松花江",400,4),
                            new Truck(6,"依维柯",1000,20)};

        System.out.println("欢迎使用嗒嗒租车系统：");
        System.out.println("您是否要租车：1.是;2.否");
        Scanner input1=new Scanner(System.in);
        switch(input1.nextInt()){
        case 1:{
            System.out.println("您可租用的类型及其价目表："+"\n"+"序号\t"+"车型\t"+"租金\t"+"容量");
            for(int i=0;i<Vehicles.length;i++) {//通过for遍历数组下标的方式输出所能租用的所有车辆的信息
                System.out.println(Vehicles[i]);
            }
            System.out.println("请输入您要租用的汽车数量：");
            Scanner input2=new Scanner(System.in);
            int vehicleNum=input2.nextInt();
            if(vehicleNum>0) {
                for(int j=1;j<=vehicleNum;j++) {
                System.out.println("请输入第"+j+"辆车的序号：");
                Scanner input3=new Scanner(System.in);
                int v=input3.nextInt();//将输入的车序号保存在变量v中
                if(Vehicles[v-1].getClass()==Car.class) {//判断输入的租用车型是否为Car
                    peopleVehicle+=Vehicles[v-1].name+" ";//将其车型名称加入载人车型中
                    rentSum+=Vehicles[v-1].rentPrice;//计算租金
                    peopleSum+=((Car)Vehicles[v-1]).getPeopleCapacity();//计算载客数
                }else if(Vehicles[v-1].getClass()==Truck.class){
                    cargoVehicle+=Vehicles[v-1].name+" ";//将其车型名称加入载货车型中
                    rentSum+=Vehicles[v-1].rentPrice;//计算租金
                    cargoSum+=((Truck)Vehicles[v-1]).getCargoCapacity();//计算载货数
                }else if(Vehicles[v-1].getClass()==Pickup.class) {
                    peopleVehicle+=Vehicles[v-1].name+" ";//将其车型名称加入载人车型中
                    cargoVehicle+=Vehicles[v-1].name+" ";//将其车型名称加入载货车型中
                    rentSum+=Vehicles[v-1].rentPrice;//计算租金
                    peopleSum+=((Pickup)Vehicles[v-1]).getPeopleCapacity();//计算载客数
                    cargoSum+=((Pickup)Vehicles[v-1]).getCargoCapacity();//计算载货数
                }
                }
            System.out.println("请输入租车天数：");
            Scanner input4=new Scanner(System.in);
            int day=input4.nextInt();
            if(day>0) {
                rentSum=rentSum*day; 
                System.out.println("****您的账单：\n****您租用的可载人的车："+peopleVehicle+"\n****共可载客："+peopleSum+"人");
                System.out.println("****您租用的可载货的车："+cargoVehicle+"\n****共可载货："+cargoSum+"吨");
                System.out.println("****租车总价格："+rentSum+"元");
                System.out.println("\n******感谢使用嗒嗒租车系统,祝您生活愉快！******");
                System.exit(0);
                } else{
                System.out.println("输入的租车天数有误，系统无法验证！");
                System.exit(0);}
            }else {
                System.out.println("输入的租车数量有误，系统无法验证！");
                System.exit(0);
            }
            break;
        }
        case 2: {
            System.out.println("******感谢使用嗒嗒租车系统,祝您生活愉快！******");
            System.exit(0);
            break;}
        default:{
            System.out.println("您输入的数字有误，系统无法验证！");
            System.out.println("\n******感谢使用嗒嗒租车系统,祝您生活愉快！******");
            System.exit(0);}
            }
        }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Test service=new Test();
        service.method();
    }
}