Java入门第二季——答答租车系统

创建Car父类，PassengerCar、Pickup、Truck子类

父类Car：

package com.imooc.exercise;

//Car汽车类，父类
public class Car {
    //描述汽车的特征
    private String name;//车的名称
    private int space;//载客数量
    private double weight;//车的载重量
    private int dailyRent;//车的日租金

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getSpace() {
        return space;
    }
    public void setSpace(int space) {
        this.space = space;
    }
    public double getWeight() {
        return weight;
    }
    public void setWeight(double weight) {
        this.weight = weight;
    }
    public int getDailyRent() {
        return dailyRent;
    }
    public void setDailyRent(int dailyRent) {
        this.dailyRent = dailyRent;
    }
}

子类PassengerCar小汽车：

package com.imooc.exercise;

//Passenger载客车
public class PassengerCar extends Car{

    public PassengerCar(String name,int space,int dailyRent){

        super.setName(name);
        super.setSpace(space);
        super.setDailyRent(dailyRent);

    }
}

子类Pickup皮卡：

package com.imooc.exercise;

//Pickup皮卡
public class Pickup extends Car{

public Pickup(String name,int space,double weight,int dailyRent){

        super.setName(name);
        super.setSpace(space);
        super.setWeight(weight);
        super.setDailyRent(dailyRent);

    }
}

子类Truck卡车：

package com.imooc.exercise;

//Truck载货车
public class Truck extends Car{

    public Truck(String name,double weight,int dailyRent){

        super.setName(name);
        super.setWeight(weight);
        super.setDailyRent(dailyRent);

    }   
}

测试类Test：

package com.imooc.exercise;

import java.text.DecimalFormat;
import java.util.Scanner;

public class Test {

    public static void main(String[] args){

        DecimalFormat df = new DecimalFormat("#0.0");

        Car[] cars = {new PassengerCar("奥迪A4",4,500),
                      new PassengerCar("马自达6",4,400),
                      new Pickup("皮卡雪6",4,2,450),
                      new PassengerCar("金龙",20,800),
                      new Truck("松花江",4,400),
                      new Truck("依维柯",20,1000)
        };

        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 input = new Scanner(System.in);
        int is = input.nextInt();

        //输入1,列出可租车型及详细信息，挑选车型
        if(is == 1){

            int num = 1;//序号
            double totalMoney = 0;//租金总额
            int rentCarDays = 0;//租用天数
            double totalDailyMoney = 0;//每日租金总额
            int totalSpace = 0;//总载客量
            int totalWeight = 0;//总载重量

            System.out.println("您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");

            for(Car viewCars:cars){
                if(viewCars instanceof PassengerCar){

                    System.out.println(num+".\t"+viewCars.getName()+"\t"
                                       +viewCars.getDailyRent()+"\t  载人："
                                       +viewCars.getSpace()
                                       );
                    num++;

                }else if(viewCars instanceof Pickup){

                    System.out.println(num+".\t"+viewCars.getName()
                                       +"\t"+viewCars.getDailyRent()+"元/天"
                                       +"\t  载人："+viewCars.getSpace()+" 载货："
                                       +viewCars.getWeight()
                                       );
                    num++;

                }else if(viewCars instanceof Truck){

                    System.out.println(num+".\t"+viewCars.getName()+"\t"
                                       +viewCars.getDailyRent()+"元/天"
                                       +"  载货："+viewCars.getWeight()
                                       );
                    num++;

                }
            }

            System.out.println("请输入您要租汽车的数量(最大租车数为"+cars.length+")：");
            Scanner input2 = new Scanner(System.in);
            int carNeeded = input2.nextInt();//需要租车的数量

            if(carNeeded>0&&carNeeded<=num){
                Car[] needCars = new Car[carNeeded];
                Scanner input3 = new Scanner(System.in);
                for(int i=1;i<=carNeeded;i++){ 

                    System.out.println("请输入第"+i+"辆车的序号：");

                    int currentCarNum = input3.nextInt();

                    needCars[i-1] = cars[currentCarNum-1];

                    totalDailyMoney += needCars[i-1].getDailyRent();//所有车辆每日资金总额
                    totalSpace += needCars[i-1].getSpace();//总载客量
                    totalWeight += needCars[i-1].getWeight();//总载重量
                }

                System.out.println("请输入租车天数：");
                Scanner input4 = new Scanner(System.in);
                rentCarDays = input4.nextInt();
                totalMoney = rentCarDays*totalDailyMoney;//总金额

                System.out.println("您的账单：\n***可载人的车有：");
                //载客账单
                for(int j=0;j<needCars.length;j++){
                    if((needCars[j] instanceof PassengerCar)||(needCars[j] instanceof Pickup)){

                        System.out.print(needCars[j].getName()+"\t");

                    }
                }
                System.out.println("共载人："+totalSpace+"人");
                System.out.println("\n***可载货的车有：");
                //载货账单
                for(int j=0;j<needCars.length;j++){
                    if((needCars[j] instanceof Pickup)||(needCars[j] instanceof Truck)){

                        System.out.print(needCars[j].getName()+"\t");

                    }
                }
                System.out.println("共载货："+df.format(totalWeight)+"吨");

                System.out.println("***租车总价格："+df.format(totalMoney)+"元");

            }else{
                System.out.println("输入错误，请修改租车数量！");
            }           
        }else{
            System.out.println("感谢您访问答答租车系统！");
        }       
    }   
}

运行结果：