Java代码~~汽车租赁系统

租车信息：

输出结果：

代码：

1、先定义抽象类（汽车类：Moto）

package cn.aura.demo01;

public abstract class Moto {
    //公共属性
    private String id;//车牌号
    private String brand;//品牌
    private int preRent;//日租金
    //构造方法
    public Moto(String id, String brand, int preRent) {
        this.id = id;
        this.brand = brand;
        this.preRent = preRent;
    }
    //set和get方法
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getBrand() {
        return brand;
    }
    public void setBrand(String brand) {
        this.brand = brand;
    }
    public int getPreRent() {
        return preRent;
    }
    public void setPreRent(int preRent) {
        this.preRent = preRent;
    }
    //计算租金方法
    public abstract double  calRent(int days);
}

2.定义轿车类继承汽车类

package cn.aura.demo01;
/**
 * 轿车类
 */
public class Car extends Moto{
    //私有属性
    private String type;//型号
    //set和get方法
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    //构造方法
    public Car(String id, String brand, String type,int preRent) {
        super(id, brand, preRent);
        this.type = type;
    }
    
    //重写计算租金的算法
    @Override
    public double calRent(int days) {
        if(days >0 && days <= 7) {
            //days小于7天，不打折
            return getPreRent()*days;
        }else if (days > 7 && days <= 30) {
            //days大于7天，9折
            return getPreRent()*days*0.9;
        }else if (days > 30 && days <= 150) {
            //days大于30天，8折
            return getPreRent()*days*0.8;
        }else if (days > 150) {
            //days大于150天，7折
            return getPreRent()*days*0.7;
        }
        return 0;
    }
}

3.定义客车类

package cn.aura.demo01;
/**
 * 客车类
 */
public class Bus extends Moto{
    //私有属性
    private int seatCount;//座位数
    //set和get方法
    public int getSeatCount() {
        return seatCount;
    }
    public void setSeatCount(int seatCount) {
        this.seatCount = seatCount;
    }
    //构造方法
    public Bus(String id, String brand, int seatCount, int preRent) {
        super(id, brand, preRent);
        this.seatCount = seatCount;
    }
    //重写计算租金的算法
    @Override
    public double calRent(int days) {
        if(days >0 && days <3) {
            //days小于3天，不打折
            return getPreRent()*days;
        }else if (days >= 3 && days < 7) {
            //days大于3天，9折
            return getPreRent()*days*0.9;
        }else if (days >= 7 && days <30) {
            //days大于3天，8折
            return getPreRent()*days*0.8;
        }else if (days >= 30 && days <150) {
            //days大于30天，7折
            return getPreRent()*days*0.7;
        }else if (days >= 150) {
            //days大于150天，6折
            return getPreRent()*days*0.6;
        }
        return 0;
    }
}

4.定义汽车业务类

package cn.aura.demo01;
/**
 * 定义汽车业务类
 */
public class MotoOperation {
    //初始化数组
    public static Moto[] motos = new Moto[8];
    //创建8个汽车对象
    public  void init() {
        motos[0] = new Car("京NY28558", "宝马", "X6", 800);
        motos[1] = new Car("京CNY3284", "宝马", "550i", 600);
        motos[2] = new Car("京NT37465", "别克", "林荫大道", 300);
        motos[3] = new Car("京NT96968", "别克", "GL8", 600);
        motos[4] = new Bus("京6566754", "金杯", 16, 800);
        motos[5] = new Bus("京8696997", "金龙", 16, 800);
        motos[6] = new Bus("京9696996", "金杯", 34, 1500);
        motos[7] = new Bus("京8696998", "金龙", 34, 1500);
    }
    //租赁汽车的方法
    public  Moto motoLeaseOut(String brand,String type,int seat) {
         //for循环遍历数组motos
         for(int i=0;i<motos.length;i++){
             if (brand.equals(motos[i].getBrand())) {
                // 判断Moto类的motos[i]的类型是否和Car一样
                if (motos[i] instanceof Car) {
                    // 强转成小汽车Car
                    Car car = (Car) motos[i];
                    if (type.equals(car.getType())) {
                        return car;
                    }
                }
                if(motos[i] instanceof Bus){
                    // 强转成大客车Bus
                    Bus bus = (Bus) motos[i];
                    if (seat == bus.getSeatCount()) {
                        return bus;
                    }
                }
            }
          
         }
         //如果没有就返回空
         return null;
    }
}

5.定义测试类

package cn.aura.demo01;

import java.util.Scanner;

/**
 * 汽车租赁管理类
 */
public class TestRent {
    //主函数
    public static void main(String[] args) {
        MotoOperation motoOperation = new MotoOperation();
        // 初始化汽车
        motoOperation.init();
        //设置一个空容器
        Moto moto = null;
        // 提示信息
        System.out.println("***********欢迎光临腾飞汽车租赁公司***********");
        System.out.println("1、轿车           2、客车");
        System.out.println("请输入你要租赁的汽车类型：");
        // 获取用户输入
        Scanner scanner = new Scanner(System.in);
        int flag = scanner.nextInt();
        if (flag == 1) {
            //轿车
            System.out.println("请选择你要租赁的汽车品牌：1、别克   2、宝马");
            int brand = scanner.nextInt();
            if (brand == 1) {
                System.out.println("请选择你要租赁的汽车类型：1、林荫大道  2、GL8");
                int type = scanner.nextInt();
                if (type == 1) {
                    moto = motoOperation.motoLeaseOut("别克", "林荫大道", 4);
                } else if (type == 2) {
                    moto = motoOperation.motoLeaseOut("别克", "GL8", 4);
                }
            } else if (brand == 2) {
                System.out.println("请选择你要租赁的汽车类型：1、X6  2、550i");
                int type = scanner.nextInt();
                if (type == 1) {
                    moto = motoOperation.motoLeaseOut("宝马", "X6", 4);
                } else if (type == 2) {
                    moto = motoOperation.motoLeaseOut("别克", "550i", 4);
                }
            }
        } else if (flag == 2) {
            //客车
            System.out.println("请选择你要租赁的汽车品牌：1、金龙   2、金杯");
            int brand = scanner.nextInt();
            if (brand == 1) {
                System.out.println("请选择你要租赁的汽车座位数：1、16座  2、34座");
                int type = scanner.nextInt();
                if (type == 1) {
                    moto = motoOperation.motoLeaseOut("金龙", "", 16);
                } else if (type == 2) {
                    moto = motoOperation.motoLeaseOut("金龙", "", 34);
                }
            } else if (brand == 2) {
                System.out.println("请选择你要租赁的汽车座位数：1、16座  2、34座");
                int type = scanner.nextInt();
                if (type == 1) {
                    moto = motoOperation.motoLeaseOut("金杯", "", 16);
                } else if (type == 2) {
                    moto = motoOperation.motoLeaseOut("金杯", "", 34);
                }
            }
        }
        //客户汽车匹配完成
        if (moto != null) {
            // 获取用户租车天数
            System.out.println("请输入您的租车天数：");
            int days = scanner.nextInt();
            // 计算租车钱
            double money = moto.calRent(days);
            System.out.println("分配给您的汽车牌号是：" + moto.getId());
            System.out.println("您需要支付的租赁费用是：" + money + "元");
        }else {
            System.out.println("很抱歉先生：当前的公司内，暂无您要的汽车类型！请重新选择！");
        }
        
    }
        

}