综合练习3-汽车租赁系统（对象+数组）

1.汽车类（父类）

//汽车类
public abstract class Automobile {
	private String brand;//品牌
	private String numberPlate;//车牌号
	private double dailyRent;//日租金
	
	public Automobile() {
		
	}
	public Automobile(String brand, String numberPlate, double dailyRent) {
		super();
		this.brand = brand;
		this.numberPlate = numberPlate;
		this.dailyRent = dailyRent;
	}
	public String getBrand() {
		return brand;
	}
	public void setBrand(String brand) {
		this.brand = brand;
	}
	public String getNumberPlate() {
		return numberPlate;
	}
	public void setNumberPlate(String numberPlate) {
		this.numberPlate = numberPlate;
	}
	public double getDailyRent() {
		return dailyRent;
	}
	public void setDailyRent(double dailyRent) {
		this.dailyRent = dailyRent;
	}
	//日租金计算方法
	public abstract double countRent(int days);
		
}

2.轿车类（子类）

//轿车类
public class Car extends Automobile {

	private String model;// 汽车型号

	public Car() {

	}

	public Car(String brand, String numberPlate, double dailyRent, String model) {
		super(brand, numberPlate, dailyRent);
		this.model = model;
	}

	public String getModel() {
		return model;
	}

	public void setModel(String model) {
		this.model = model;
	}
	//重写日租金计算方法
	@Override
	public double countRent(int days) {
		double price = this.getDailyRent() * days;
		if (days > 150) {
			price *= 0.7;
		}else if(days>30){
			price *= 0.8;
		}else if(days>7){
			price *= 0.9;
		}
		return price;
	}

}

3.客车类（子类）

//客车类
public class Passenger extends Automobile {

	private int seatNum;//座位数

	public Passenger() {

	}

	public int getSeatNum() {
		return seatNum;
	}

	public void setSeatNum(int seatNum) {
		this.seatNum = seatNum;
	}

	public Passenger(String brand, String numberPlate, double dailyRent,
			int seatNum) {
		super(brand, numberPlate, dailyRent);
		this.seatNum = seatNum;
	}
	//重写日租金计算方法
	@Override
	public double countRent(int days) {
		double price = this.getDailyRent() * days;
		if (days >= 150) {
			price *= 0.6;
		} else if (days >= 30) {
			price *= 0.7;
		} else if (days >= 7) {
			price *= 0.8;
		} else if (days >= 3) {
			price *= 0.9;
		}
		return price;
	}

}

4.业务逻辑类

//汽车业务类
public class MotoOperation {
	// 创建汽车类数组
	Automobile[] autos = new Automobile[8];

	// 初始化汽车方法
	public void init() {
		// 初始化轿车
		Car car1 = new Car("宝马", "京NY28588", 800, "X6");
		Car car2 = new Car("宝马", "京CNY3284", 600, "550i");
		Car car3 = new Car("别克", "京NT37465", 300, "林荫大道");
		Car car4 = new Car("别克", "京NT96968", 600, "GL8");

		// 初始化客车
		Passenger pg1 = new Passenger("金杯", "京6566754", 800, 16);
		Passenger pg2 = new Passenger("金龙", "京8696997", 800, 16);
		Passenger pg3 = new Passenger("金杯", "京9696996", 1500, 34);
		Passenger pg4 = new Passenger("金龙", "京8696998", 1500, 34);

		// 将汽车放入数组
		autos[0] = car1;
		autos[1] = car2;
		autos[2] = car3;
		autos[3] = car4;
		autos[4] = pg1;
		autos[5] = pg2;
		autos[6] = pg3;
		autos[7] = pg4;
	}
	
	// 租车方法
	public Automobile motoLeaseOut(String brand, String model, int seatNum) {
		Automobile auto = null;

		//查询整个数组，找到符合顾客要求的车
		for (Automobile rentAuto : autos) {
			//如果是轿车，需要品牌和型号
			if (rentAuto instanceof Car) {
				Car car = (Car) rentAuto;
				if (car.getBrand().equals(brand)
						&& car.getModel().equals(model)) {
					auto = car;
					break;
				}
			} else {
				//如果是客车，需要品牌和座位数
				Passenger pg = (Passenger) rentAuto;
				if(pg.getBrand().equals(brand)&&pg.getSeatNum()==seatNum){
					auto = pg;
					break;
				}	
			}
		}

		return auto;
	}
}

5.测试类

import java.util.Scanner;

import cn.bdqn.vehicle.Automobile;

public class RentMgr {
	public static final Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		
		MotoOperation motoMgr = new MotoOperation();

		// 初始化汽车方法
		motoMgr.init();

		System.out.println("************欢迎光临汽车租赁系统************");
		System.out.println("请选择您想租车的类型：（1.轿车	2.客车）");

		// 顾客租车条件
		String brand = "";// 汽车品牌
		String model = "";// 汽车型号
		int seatNum = 0;// 座位数

		int index = judge();
		

		if (index == 1) {
			// 租轿车
			System.out.println("请选择您要租的汽车品牌：（1.宝马	2.别克）");
			index = judge();
			if (index == 1) {
				brand = "宝马";
				System.out.println("请选择汽车型号：（1.X6	2.550i）");
				index = judge();

				if (index == 1) {
					model = "X6";

				} else if (index == 2) {
					model = "550i";
				}
			} else if (index == 2) {
				brand = "别克";
				System.out.println("请选择汽车型号：（1.林荫大道	2.GL8）");
				index = judge();

				if (index == 1) {
					model = "林荫大道";

				} else if (index == 2) {
					model = "GL8";
				}
			}
		} else if (index == 2) {
			// 租客车
			System.out.println("请选择您要租的汽车品牌：（1.金杯	2.金龙）");
			index = judge();
			if (index == 1) {
				brand = "金杯";
				System.out.println("请选择汽车座位数：（1.16人	2.34人）");
				index = judge();

				if (index == 1) {
					seatNum = 16;

				} else if (index == 2) {
					seatNum = 34;
				}
			} else if (index == 2) {
				brand = "金龙";
				System.out.println("请选择汽车座位数：（1.16人	2.34人）");
				index = judge();

				if (index == 1) {
					seatNum = 16;

				} else if (index == 2) {
					seatNum = 34;
				}
			}
		}
		
		Automobile auto = motoMgr.motoLeaseOut(brand, model, seatNum);
		
		System.out.println("请输入您要租赁天数：");
		int days = sc.nextInt();
		
		double money = auto.countRent(days);
		
		System.out.println("租车成功！请按照车牌号提车！车牌号为："+auto.getNumberPlate());
		
		System.out.println("您需要支付"+money+"元！");
	}
	//输入数据效验
	public static int judge(){
		int index;
		do {
			index = sc.nextInt();
			if (index > 2 || index < 1) {
				System.out.println("请选择正确品数据！");
			}
		} while (index > 2 || index < 1);
		return index;
	}
}