DADA租车系统代码实现

车类

package com.DadaRentCar;
public class Car {
    private int id;//定义编号
    private int num;//定义数量
    private double prince;//定义金额
    private String name;//定义名称

    public int getId(){
        return id;
    }
    public void setId(int id){
        this.id=id;
    }
    public int getNum() {
        return num;
    }
    public void setNum(int num) {
        this.num = num;
    }
    public double getPrince() {
        return prince;
    }
    public void setPrince(double prince) {
        this.prince = prince;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

}

货车类

package com.DadaRentCar;

public class Trunk extends Car implements IGodcarry{
//货车类
private int carryGo;//运货

public Trunk(int id,String name,int number,double prince,int carryGo){
    this.setId(id);
    this.setName(name);
    this.setNum(number);
    this.setPrince(prince);
    this.carryGo=carryGo;
}
public String toString(){
    return "编号:"+getId()+"\t车名为："+getName()+    "\t剩余数量："+getNum()+"\t租金："
+getPrince()+"\t载货量："+carryGo;
    }
@Override
public int getgodCarry() {
    // TODO Auto-generated method stub
    return carryGo;
}

}

客车类

package com.DadaRentCar;
public class Bus extends Car implements IPepocarry{
//客车类
int carryPep;
public Bus(int id,String name,int number,double prince,int carryPep){
this.setId(id);
this.setName(name);
this.setNum(number);
this.setPrince(prince);
this.carryPep=carryPep;
}
public String toString(){//返回对象中的信息
return "编号:"+getId()+"\t车名为："+getName()+"\t剩余数量："+getNum()+"\t租金："
+getPrince()+"\t载客量："+carryPep;

}
@Override
public int getPepocarry() {
    // TODO Auto-generated method stub

    return carryPep;
}

}

载人接口

package com.DadaRentCar;
//载人接口
public interface IPepocarry {
public int getPepocarry();
}

载货接口

package com.DadaRentCar;
//载货接口
public interface IGodcarry {
    public int getgodCarry();
}

皮卡类//可载人和货

package com.DadaRentCar;

public class Pickup extends Car implements IPepocarry,IGodcarry {
    int carrygod,carrypepo;
    public Pickup(int id,String name,int number,double prince,int carrygod,int carrypepo){
        this.setId(id);
        this.setName(name);
        this.setNum(number);
        this.setPrince(prince);
        this.carrygod=carrygod;
        this.carrypepo=carrypepo;
    }
    public String toString(){
        return "编号:"+getId()+"\t车名为："+getName()+    "\t剩余数量："+getNum()+"\t租金："
                +getPrince()+"\t载客量："+carrypepo+"\t载货量"+carrygod;
    }

    @Override
    public int getgodCarry() {
        // TODO Auto-generated method stub
        return carrygod;
    }

    @Override
    public int getPepocarry() {
        // TODO Auto-generated method stub
        return carrypepo;
    }

}

主函数

package com.DadaRentCar;

import java.util.Scanner;

public class Tigger {

    public static void main(String[] args) {
        Tigger t=new Tigger();
        t.show();
    }

    public void show(){//显示车辆信息
        int sumcarRent=0;//定义单日总租金
        int totalRent=0;//定义总金额
        int sumpeople=0;//总载人量
        int sumgood=0;//总载货量
        String peoplecar=" ";//保存载人车变量
        String goodcar=" ";//载货车变量
        //通过数组保存实例化的车辆对象
        System.out.println("******************************欢迎使用达达租车系统******************************");
        System.out.println("如果需要租车请按1，不需要请按其他键");
        //读取控制台输入数据
        Scanner input1=new Scanner(System.in);
        if(input1.nextInt()==1){
            System.out.println("——————可租用车辆信息如下所示——————");

                Car[] cars={new Bus(1,"金龙",5, 4000, 60),
                          new Bus(2,"海鸥",13,2000,12),
                          new Trunk(3,"红岩",17,3000,50),
                          new Trunk(4,"农用车", 4,1200, 4),
                          new Pickup(5,"长城皮卡",9,200,2,1)
                    };
                    for(int i=0;i<cars.length;i++){
                        System.out.println(cars[i]);
                }

    System.out.println("输入你要租用车辆的总数量");
    Scanner input2=new Scanner(System.in);
    int carNum=input2.nextInt();//保存输入的车辆总数
        if(carNum>0){

            for(int i=1;i<=carNum;i++){

                System.out.println("输入租用第"+i+"辆车编号");
                Scanner input3=new Scanner(System.in);
                int carId=input3.nextInt();
                //计算租金
                /**
                 * 如何找到输入的值与数中中相应对象匹配的情况2.27 23：07
                 * 蠢哭了，carId-1就是数组中的对象
                 */
                //打印选中车辆信息
                System.out.println("选租车信息"+"\n"+cars[carId-1].toString());
                //计算所选车辆总租金
                sumcarRent +=cars[carId-1].getPrince(); 

                //计算所选车辆载荷量
                //如果选的是载客车，载客车数量+对象载客量，如果载货车，载货车数量+对象载货量
                if(cars[carId-1].getClass()==Bus.class){
                     peoplecar +=cars[carId-1].getName()+ "\t";
                    //计算总载客量******非常重要**********将父类car对象强转为子类Bus类，使用子类中属性
                     sumpeople +=((Bus)cars[carId-1]).getPepocarry();
                }else if(cars[carId-1].getClass()==Trunk.class){
                    goodcar +=cars[carId-1].getName()+"\t";

                    sumgood +=((Trunk)cars[carId-1]).getgodCarry();
                }else if(cars[carId-1].getClass()==Pickup.class){//皮卡车型，既可以是载客，也可以载货
                    peoplecar +=cars[carId-1].getName()+ "\t";
                    goodcar +=cars[carId-1].getName()+"\t";

                    sumpeople +=((Pickup)cars[carId-1]).getPepocarry();
                    sumgood   +=((Pickup)cars[carId-1]).getgodCarry();
                }

            }
            //选择租用车辆完成
            System.out.println("***********输入你要租用的天数***********");
            Scanner inputday=new Scanner(System.in);
            int days=inputday.nextInt();
            if(days>0){
                totalRent=sumcarRent*days;//天数乘单日总租金
            }else{
                System.out.println("输入数据有误");
                System.exit(0);//退出系统
            }           

                        System.out.println("*************信息输出*************");
                        System.out.println("你选择的载人汽车有："+peoplecar);
                        System.out.println("总载客量为："+sumpeople+"人");

                        System.out.println("你选择的载货汽车有："+goodcar);
                        System.out.println("总载货量是："+sumgood+"吨");

                        System.out.println("总租金是："+totalRent);
                        System.out.println("**************************感谢使用达达租车系统**************************");
        }else{
                System.out.println("输入错误");
                System.exit(0);//退出系统
            }
        }else{
            System.out.println("您不需要租车");
            System.exit(0);//退出系统
        }

    }

}