汽车租贷管理系统简单实现

//车类

package Vehicle;

public abstract class Car {
    private String carId;        //车牌号
    private String brand;        //品牌
    private int rent;            //租金
    public Car() {
        super();
    }
    public Car(String carId, String brand, int rent) {
        super();
        this.carId = carId;
        this.brand = brand;
        this.rent = rent;
    }
    public String getCarId() {
        return carId;
    }
    public void setCarId(String carId) {
        this.carId = carId;
    }
    public String getBrand() {
        return brand;
    }
    public void setBrand(String brand) {
        this.brand = brand;
    }
    public int getRent() {
        return rent;
    }
    public void setRent(int rent) {
        this.rent = rent;
    }
    
    public abstract double carRent(double day);

}
 

package Vehicle;
 
 
//轿车类
public class Automobile extends Car{
	private String type;		//型号
	
	
	public Automobile() {
		super();
	}
 
 
	public Automobile(String carId, String brand, int rent, String type) {
		super(carId, brand, rent);
		this.type = type;
	}
 
 
	public String getType() {
		return type;
	}
 
 
	public void setType(String type) {
		this.type = type;
	}
 
 
	@Override
	public double carRent(double day) {
		double number = this.getRent()*day;
		if(day>150){
			number=number*0.7;
		}else if(day>30){
			number=number*0.8;
		}else if(day>7){
			number = number*0.9;
		}
		return number;
	}
 
 
 
}

package Vehicle;
//客车类
public class Bus extends Car{
	private int seating;		//座位数
	
	
	
	public Bus() {
		super();
	}
 
 
 
	public Bus(String carId, String brand, int rent, int seating) {
		super(carId, brand, rent);
		this.seating = seating;
	}
 
 
 
	public int getSeating() {
		return seating;
	}
 
 
 
	public void setSeating(int seating) {
		this.seating = seating;
	}
 
 
 
	@Override
	public double carRent(double day) {
		double number = this.getRent();
		if(day>=150){
			number=number*0.6;
		}else if(day>=30){
			number=number*0.7;
		}else if(day>=7){
			number = number*0.8;
		}else if(day>=3){
			number = number*0.9;
		}
		return number;
	}
 
}

-------------------------------上面在一个包里，下面在另一个包里--------------------------------------------------

package Business;
 
import Vehicle.Automobile;
import Vehicle.Bus;
import Vehicle.Car;
 
public class CarBusiness {
//	定义Car型数组
	public Car[] car=new Car[8];
	
//	初始化
	public void init(){
		car[0]=new Automobile("京NY28588","宝马",800,"X6");
		car[1]=new Automobile("京CNY3284","宝马",600,"550i");
		car[2]=new Automobile("京NT37465","别克",300,"林荫大道");
		car[3]=new Automobile("京NT96968","别克",600,"GL8");
		car[4]=new Bus("京6566754","金杯",800,16);
		car[5]=new Bus("京8696997","金龙",800,16);
		car[6]=new Bus("京9696996","金杯",1500,34);
		car[7]=new Bus("京8696998","金龙",1500,34);
		
	}
	
//	找车，根据条件，输出相对应的数(品牌，型号，座位数)
	public Car rentCar(String brand,String type,int seating){
		Car newCar=null;
		for(int i=0 ;i
			if(car[i] instanceof Automobile){
				Automobile car1 =(Automobile)car[i];
				if(car1.getBrand().equals(brand) && car1.getType().equals(type)){
					newCar=car1;
					break;
				}
			}else if(car[i] instanceof Bus){
				Bus bus =(Bus)car[i];
				if(bus.getBrand().equals(brand) && bus.getSeating()==seating){
					newCar=bus;
					break;
				}
			}
		}
		return newCar;
	}
}

package Business;
//管理和测试
import java.util.Scanner;
import Vehicle.Car;
 
public class CarManagement {
	Scanner sc = new Scanner(System.in);
	
	public void show(){
		CarBusiness cb = new CarBusiness();
		cb.init();
		System.out.println("----------------欢迎光临---------------------");
		System.out.println("请选择租车的类型：");
		System.out.print("1/轿车，2/客车(请选择)：");
		int num=sc.nextInt();
		
		String brand ="";
		String type="";
		int seating=0;
		if(num==1){
			System.out.print("请选择要租车的品牌：1、别克，2、宝马：");
			int choose = sc.nextInt();
			if(choose==1){
				brand="别克";
				System.out.print("请选择汽车的型号：1、林荫大道，2、GL8：");
				type = (sc.nextInt()==1)?"林荫大道":"GL8";
				System.out.print("请输入要租车的天数：");
				double numb=sc.nextInt();
				Car car = cb.rentCar(brand, type, seating);
				
				System.out.println("租车成功：你的车是：");
				System.out.println("车牌号："+cb.rentCar(brand, type, seating).getCarId()+"\t品牌："+cb.rentCar(brand, type, seating).getBrand()+
						"\t型号："+type);
				System.out.println("你需要支付"+car.carRent(numb)+"元");
			}else if(choose==2){
				brand="宝马";
				System.out.print("请选择汽车的型号：1、X6，2、550i：");
				type = (sc.nextInt()==1)?"X6":"550i";
				
				System.out.print("请输入要租车的天数：");
				
				Car car = cb.rentCar(brand, type, seating);
				double numb=sc.nextInt();
				System.out.println("租车成功：你的车是：");
				System.out.println("车牌号："+cb.rentCar(brand, type, seating).getCarId()+"\t品牌："+cb.rentCar(brand, type, seating).getBrand()+
						"\t型号："+type);
				System.out.println("你需要支付"+car.carRent(numb)+"元");
			}
			
		}else if(num==2){
			type="";
			System.out.print("请选择要租车的品牌：1、金杯，2、金龙：");
			brand=sc.nextInt()==1?"金杯":"金龙";
			
			
			
			System.out.print("请选择汽车的座位数：1、16座，2、34座：");
			seating = sc.nextInt()==1?16:34;
			
			
			System.out.print("请输入要租车的天数：");
			double numb=sc.nextInt();
			Car car = cb.rentCar(brand, type, seating);
			System.out.println("租车成功：你的车是：");
			System.out.println("车牌号："+cb.rentCar(brand, type, seating).getCarId()+"\t品牌："+cb.rentCar(brand, type, seating).getBrand()+
					"\t座位数："+seating);
			
			System.out.println("你需要支付"+car.carRent(numb)+"元");
		}else{
			System.out.println("你的输入有误，已退出");
		}
		
	}
	
	public static void main(String[] args) {
		
		CarManagement cm=new CarManagement();
		cm.show();
	}
 
}