首页手记答答租车系统练习(java)

答答租车系统练习(java)

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Java

第一次，烂到爆炸的java程序，第一次总想把一切特殊情况考虑进去，比如两次选中同一款车辆等等，最后还是作罢，实现已经花了一个下午。

//所有的车，是Truck,Coach,Pickup的父类
public abstract class allCar {
    protected String name;
    protected float price;
    protected int passenger;
    protected float freight;

    public float getPrice() {
        return price;
    }
    public void setPrice(float price) {
        this.price = price;
    }
    public int getPassenger() {
        return passenger;
    }
    public void setPassenger(int passenger) {
        this.passenger = passenger;
    }
    public float getFreight() {
        return freight;
    }
    public void setFreight(float freight) {
        this.freight = freight;
    }
    public void info() {
        System.out.println("这是一辆车");
    }   
    public abstract boolean canPassenger();
    public abstract boolean canFreight();

}

//客车类，包括大型客车和小客车
public class Coach extends allCar {

    private String name;
    private float price;
    private int passenger;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public float getPrice() {
        return price;
    }
    public void setPrice(float price) {
        this.price = price;
    }
    public int getPassenger() {
        return passenger;
    }
    public void setPassenger(int passenger) {
        this.passenger = passenger;
    }

    public void info(){
        System.out.println("名称:"+name+"  价格:"+price+"元/天  载客量:"+passenger+"人");
    }
    //用到构造函数
    public boolean canPassenger(){
        return true;
    }
    public boolean canFreight(){
        return false;
    }
    public Coach(String name,float price,int passenger){
        this.name=name;
        this.price=price;
        this.passenger=passenger;

    }
}


public class Car extends Coach {

    //继承父类Coach的构造函数
    public Car(String name, float price, int passenger) {
        super(name, price, passenger);
        // TODO Auto-generated constructor stub
    }

}


public class Bus extends Coach {

    //继承父类Coach的构造函数
    public Bus(String name, float price, int passenger) {
        super(name, price, passenger);
        // TODO Auto-generated constructor stub
    }

}

//货车类，包括重型货车和轻型货车
public class Truck extends allCar{

    protected float freight;
    public void info(){
        System.out.println("名称:"+name+"  价格:"+price+"元/天  载货量"+freight+"吨");
    }
    public boolean canPassenger(){
        return false;
    }
    public boolean canFreight(){
        return true;
    }

}


public class lightTruck extends Truck {

    private String name;
    private float price;
    private float freight;

    public float getFreight() {
        return freight;
    }

    public void setFreight(float freight) {
        this.freight = freight;
    }

    public String getName() {
        return name;
    }

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

    public float getPrice() {
        return price;
    }

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

    public lightTruck(String name, float price, int freight) {
        this.name=name;
        this.price=price;
        this.freight=freight;
        // TODO Auto-generated constructor stub
    }

    @Override
    public void info() {
        // TODO Auto-generated method stub
        System.out.print("类型:轻型货车  ");
        System.out.println("名称:"+name+"  价格:"+price+"元/天  载货量"+freight+"吨");
    }

}


public class heavyTruck extends Truck {

    private String name;
    private float price;
    private float freight;

    public float getFreight() {
        return freight;
    }

    public void setFreight(float freight) {
        this.freight = freight;
    }

    public String getName() {
        return name;
    }

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

    public float getPrice() {
        return price;
    }

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

    public heavyTruck(String name,float price,int freight){
        this.name=name;
        this.price=price;
        this.freight=freight;
    }

    @Override
    public void info() {
        // TODO Auto-generated method stub
        System.out.print("类型:重型货车  ");
        System.out.println("名称:"+name+"  价格:"+price+"元/天  载货量"+freight+"吨");
    }

}

//皮卡单独一类
public class Pickup extends allCar {

    private String name;
    private float price;
    private float freight;
    private int passenger;

    public String getName() {
        return name;
    }

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

    public float getPrice() {
        return price;
    }

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

    public float getFreight() {
        return freight;
    }

    public void setFreight(float freight) {
        this.freight = freight;
    }

    public int getPassenger() {
        return passenger;
    }

    public void setPassenger(int passenger) {
        this.passenger = passenger;
    }
    public boolean canPassenger(){
        return true;
    }
    public boolean canFreight(){
        return true;
    }
    public void info(){
        System.out.println("名称:"+name+"  价格:"+price+"元/天  载客量"+passenger+"人  载货量:"+freight+"吨");
    }

    public Pickup(String name, float price, int passenger, float freight){
        this.name=name;
        this.price=price;
        this.passenger=passenger;
        this.freight=freight;
    }
}

//测试类
import java.util.Scanner;
public class Test {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //首先初始化现有的车辆数据
        //使用多态
        allCar car1=new Car("奥迪A4",500,4);
        Coach car2=new Car("马自达6",400,4);
        Pickup car3=new Pickup("皮卡雪6",450,4,2);
        Coach car4=new Bus("金龙",800,20);
        //不使用多态，为了区分heavy/light分别写构造函数
        lightTruck car5=new lightTruck("松花江",400,4);
        heavyTruck car6=new heavyTruck("依维柯",1000,20);
        //将车辆信息存入类的数组中
        allCar carArray[]={car1,car2,car3,car4,car5,car6};

        //欢迎、提示信息
        System.out.println("欢迎来到答答租车系统！");
        System.out.println("租车请按“1”,退出请按任意键并回车");
        //等待用户键盘输入
        Scanner in=new Scanner(System.in);
        int start=in.nextInt();
        if(start==1){
            //展示所有车辆信息
            int cnt=0;
            for(allCar carx:carArray){
                cnt++;
                System.out.print(cnt+"： ");
                carx.info();
            }
            //输入要租的车数
            allCar[] clientArray=new allCar[6];
            int[] numArray=new int[]{0,0,0,0,0,0};

            for(cnt=0;cnt<6;){
                System.out.println("请您输入要租的车的序号");  
                in=new Scanner(System.in);
                int num=in.nextInt();
                if(num<=0num>6) break;
                clientArray[cnt]=carArray[num-1];

                System.out.println("请您输入要租的车的数量");  

                int num1=in.nextInt();
                if(num1==0) break;
                numArray[cnt]=num1;

                System.out.println("请您输入要租的车的天数");  

                int num2=in.nextInt();
                if(num2==0) break;
                numArray[cnt]*=num2;
                cnt++;
                System.out.println("结束请按0,继续请按任意键");
                int num3=in.nextInt();
                if(num3==0) break;

            }
            System.out.println(numArray[0]+numArray[1]);
            //输出总金额，总载客/载货量
            int sumPassenger=0;
            int sumFreight=0;   
            float Amount=0;

            for(int i=0;i<cnt;i++){
                if (clientArray[i].canFreight())
                    sumFreight+=clientArray[i].getFreight();
                if(clientArray[i].canPassenger())
                    sumPassenger+=clientArray[i].getPassenger();
                Amount+=numArray[i]*clientArray[i].getPrice();
            }
            System.out.println("Amount:"+Amount+"  总载客:"+sumPassenger+"  总载货:"+sumFreight);

        }
        else{
            System.out.println("退出租车系统");
        }
    }

}

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