汽车租赁系统（对象+集合）

//抽象类 父类 汽车类

package 对象和集合.汽车租赁系统.vehicle;
//汽车类
public abstract class MotoVehicle {
    //车牌号 品牌 日租金
    private String vehicleId;
    private String brand;
    private int perRent;

    public MotoVehicle() {
    }

    public MotoVehicle(String vehicleId, String brand, int perRent) {
        this.vehicleId = vehicleId;
        this.brand = brand;
        this.perRent = perRent;
    }
    public String getVehicleId() {
        return vehicleId;
    }
    public void setVehicleId(String vehicleId) {
        this.vehicleId = vehicleId;
    }

    public String getBrand() {
        return brand;
    }

    public void setBrand(String brand) {
        this.brand = brand;
    }

    public int getPerRent() {
        return perRent;
    }

    public void setPerRent(int perRent) {
        this.perRent = perRent;
    }

    public String toString() {
        return "MotoVehicle{vehicleId = " + vehicleId + ", brand = " + brand + ", perRent = " + perRent + "}";
    }
    //计算租金 抽象方法
    public abstract  float caleRent(int days);
}

//子类 bus

package 对象和集合.汽车租赁系统.vehicle;

public class Bus extends MotoVehicle {

    //座位数
    private int seatCount ;

    public Bus() {
    }

    public Bus(String vehicleId, String brand, int perRent, int seatCount) {
        super(vehicleId, brand, perRent);
        this.seatCount = seatCount;
    }

    /**
     * 获取
     * @return seatCount
     */
    public int getSeatCount() {
        return seatCount;
    }

    /**
     * 设置
     * @param seatCount
     */
    public void setSeatCount(int seatCount) {
        this.seatCount = seatCount;
    }
    //计算客车类的租金
    @Override
    public float caleRent(int days) {
        float price = this.getPerRent()*days;
        if (days>=3&&days<7){
            price*=0.9f;
        }else if (days>=7&&days<30){
            price*=0.8f;
        }else if (days>=30&&days<150){
            price*=0.7f;
        }else if (days>150){
            price*=0.6f;
        }
        return price;
    }
}

//子类 car

package 对象和集合.汽车租赁系统.vehicle;

public class Car extends MotoVehicle {

    //型号
    private String type;

    public Car() {
    }

    public Car(String vehicleId, String brand, int perRent, String type) {
        super(vehicleId, brand, perRent);
        this.type = type;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }
    //轿车类型的租赁方法
    @Override
    public float caleRent(int days) {
        float price = this.getPerRent()*days;
        if (days>7&&days<=30){
            price*=0.9f;
        }else if (days>30&&days<=150){
            price*=0.8f;
        }else if (days>150){
            price*=0.7f;
        }
        return price;
    }
}

//子类 truck

package 对象和集合.汽车租赁系统.vehicle;

public class Truck extends MotoVehicle {

    //吨
    private double tonnage ;

    public Truck() {
    }

    public Truck(String vehicleId, String brand, int perRent, double tonnage) {
        super(vehicleId, brand, perRent);
        this.tonnage = tonnage;
    }

    /**
     * 获取
     * @return tonnage
     */
    public double getTonnage() {
        return tonnage;
    }

    /**
     * 设置
     * @param tonnage
     */
    public void setTonnage(double tonnage) {
        this.tonnage = tonnage;
    }
    @Override
    public float caleRent(int days) {
        float price = this.getPerRent()*days;
        if (days>=3&&days<7){
            price*=0.9f;
        }else if (days>=7&&days<30){
            price*=0.8f;
        }else if (days>=30&&days<150){
            price*=0.7f;
        }else if (days>150){
            price*=0.6f;
        }
        return price;
    }
}

//初始化 及一些功能需求

package 对象和集合.汽车租赁系统.mgr;

import 对象和集合.汽车租赁系统.vehicle.Bus;
import 对象和集合.汽车租赁系统.vehicle.Car;
import 对象和集合.汽车租赁系统.vehicle.MotoVehicle;
import 对象和集合.汽车租赁系统.vehicle.Truck;

import java.util.ArrayList;
import java.util.List;

//汽车业务类
public class MotoOperation {
    public static final List<MotoVehicle> motos =new ArrayList<>();

    //初始化且车信息
    public void init(){
        motos.add(new Car("皖M78614","宝马",800,"x6"));
        motos.add(new Car("皖S66666","宝马",600,"550i")) ;
        motos.add(new Car("皖D55555","别克",300,"林荫大道")) ;
        motos.add(new Car("皖S44444","别克",600,"GL8"));
        motos.add(new Car("皖A88888","劳斯莱斯",2000,"库里南")) ;
        motos.add(new Car("皖A99999","劳斯莱斯",3000,"幻影")) ;
        motos.add(new Bus("皖I78614","金杯",800,16));
        motos.add( new Bus("皖B64516","金杯",1500,34));
        motos.add( new Bus("皖B66461","金龙",800,16));
        motos.add(new Bus("皖F88954","金龙",1500,34)) ;
        motos.add(new Bus("皖P66461","金龟",800,16)) ;
        motos.add( new Bus("皖O88954","金龟",1500,34));
        motos.add( new Truck("皖U66461","奔驰",1500,20.0));
        motos.add(new Truck("皖Y88954","飞利",3000,55.5)) ;
    }
    //租车 根据用户需求去查找数组中的相应的车辆并返回
    public MotoVehicle motoLeaseOut(String brand, String type, int seat, double tonnage){
        MotoVehicle moto =null;
        for (MotoVehicle motoVehicle : motos) {
            if (motoVehicle instanceof Car){
                Car car= (Car) motoVehicle;
                if (car.getBrand().equals(brand)&&car.getType().equals(type)){
                    moto=car;
                    break;
                }
            } else if (motoVehicle instanceof Bus) {
                Bus bus = (Bus) motoVehicle;
                if (bus.getBrand().equals(brand)&&bus.getSeatCount()==seat){
                    moto =bus;
                    break;
                }
            } else if (motoVehicle instanceof Truck) {
                Truck truck = (Truck) motoVehicle;
                if (truck.getBrand().equals(brand)&&truck.getTonnage()==tonnage){
                    moto=truck;
                    break;
                }
            }
        }
        return moto;
    }
}

//主类

package 对象和集合.汽车租赁系统.mgr;

import 对象和集合.汽车租赁系统.vehicle.MotoVehicle;

import java.util.Scanner;

//汽车租赁管理类
public class RentMgr {
    public  static final Scanner SC =new Scanner(System.in);
    public static void main(String[] args) {
        MotoOperation motomgr =new MotoOperation();
        //租赁公司需要购置汽车
        motomgr.init();
        System.out.println("------------欢迎光临租赁豪车公司-------------");
        String barnd= null; //品牌
        String type= null; //型号
        int seat = 0; //座位数
        double tonnage= 0;//吨位
        String num="n";
        b:while (true) {
            System.out.println("1、轿车\t2、客车\t3、卡车");
            System.out.println("请选择你要租的车：");
            int motoType =SC.nextInt();
            barnd = "";
            type = " ";
            seat = 0;
            tonnage = 0;
            if (motoType==1) {
                //租赁轿车
               do{
                    System.out.println("请选择你要租赁的品牌： 1、宝马\t2、别克\t3、劳斯莱斯");
                    int choose = SC.nextInt();
                    switch (choose){
                        case 1:
                            barnd="宝马";
                            System.out.println("请输入你的汽车型号：1、x6\t2、550i");
                            type=(SC.nextInt()==1)?"x6":"550i";
                            break b;
                        case 2:
                            barnd="别克";
                            System.out.println("请输入你的汽车型号：1、林荫大道\t2、GL8");
                            type=(SC.nextInt()==1)?"林荫大道":"GL8";
                            break b;
                        case 3:
                            barnd="劳斯莱斯";
                            System.out.println("请输入你的汽车型号：1、库里南\t2、幻影");
                            type=(SC.nextInt()==1)?"库里南":"幻影";
                            break b;
                        default:
                            System.out.println("输入错误！");
                            System.out.println("是否要继续y/n");
                            num=SC.next();
                            if (num.equals("n")){
                                continue b;
                            }
                    }
                }while (true);
            } else if (motoType==2) {
                type="";
                do {
                    System.out.println("请选择你要租赁的品牌： 1、金杯\t2、金龙\t3、金龟");
                    int choose = SC.nextInt();
                    switch (choose){
                        case 1:
                            barnd="金杯";
                            System.out.println("请输入你要选择的座位数：1、16\t2、34");
                            seat=(SC.nextInt()==1)?16:34;
                            break b;
                        case 2:
                            barnd="金龙";
                            System.out.println("请输入你要选择的座位数：1、16\t2、34");
                            seat=(SC.nextInt()==1)?16:34;
                            break b;
                        case 3:
                            barnd="金龟";
                            System.out.println("请输入你要选择的座位数：1、16\t2、34");
                            seat=(SC.nextInt()==1)?16:34;
                            break b;
                        default:
                            System.out.println("输入错误！");
                            System.out.println("是否要继续y/n");
                            num=SC.next();
                            if (num.equals("n")){
                                continue b;
                            }
                    }
                } while (true);
            }else if (motoType==3) {
                type="";
                do {
                    System.out.println("请选择你要租赁的品牌： 1、奔驰\t2、飞利");
                    int choose = SC.nextInt();
                    switch (choose){
                        case 1:
                            barnd="奔驰";
                            System.out.println("请输入你要选择的吨位数：1、20.0\t2、55.5");
                            tonnage=(SC.nextInt()==1)?20.0:55.5;
                            break b;
                        case 2:
                            barnd="飞利";
                            System.out.println("请输入你要选择的吨位数：1、20.0\t2、55.5");
                            tonnage=(SC.nextInt()==1)?20.0:55.5;
                            break b;
                        default:
                            System.out.println("输入错误！");
                            System.out.println("是否要继续y/n");
                            num=SC.next();
                            if (num.equals("n")){
                                continue b;
                            }
                    }
                } while (true);
            }else {
                System.out.println("输入错误请重新输入！");
            }
        }
        //租车

            MotoVehicle moto = motomgr.motoLeaseOut(barnd, type, seat, tonnage);
            System.out.println("请输入您的租赁天数");
            int days = SC.nextInt();
            float momey = moto.caleRent(days);
            System.out.println("租车成功，车牌号是：" + moto.getVehicleId());
            System.out.println("您需要支付：" + momey + "元");

    }
}

如有需要可自行进行扩展！！！！