java实现汽车租赁系统

//车类public abstract class Vehicle { //车牌号  品牌  日租金 private String id; private String brand; private int perRent;  public Vehicle(){} //Vehicle的带参构造方法 public Vehicle(String id, String brand, int perRent) { this.id = id; this.brand = brand; this.perRent = perRent; }  public void setId(String id){ this.id=id ; } public String getId(){ return id; }  public void setBrand(String brand){ this.brand=brand; } public String getBrand(){ return brand; }  public void setPerRent(int perRent){ this.perRent=perRent; } public int getPerRent(){ return perRent; } //抽象方法计算租金 public abstract double calcRent(int days); } //轿车类public class Car extends Vehicle{ //型号 private String type; public void setType(String type){ this.type=type; } public String getType(){ return type; }  public Car(){} //Car的带参构造方法 public Car(String id, String brand, int perRent,String type) { super(id,brand,perRent); this.type = type; } //重写父类的计算租金方法：根据自己的计算租金规则 public double calcRent(int days) { double price = this.getPerRent()*days; if(days>7 && days<=30){  price *= 0.9; }else if(days>30 && days<=150){  price *= 0.8; }else if(days>150){  price *= 0.7; } return price; }} //客车类public class Bus extends Vehicle{ //座位数 private int seatCount; public void setSeatCount(int seatCount){ this.seatCount=seatCount; } public int getSeatCount(){ return seatCount; }   public Bus(){} //Bus的带参构造方法 public Bus(String id,String brand,int perRent,int seatCount){ super(id,brand,perRent); this.seatCount = seatCount; } //重写父类的计算租金方法：根据自己的计算租金规则 public double calcRent(int days) { double price = this.getPerRent()*days; if(days>=3 && days<7){  price *= 0.9; }else if(days>=7 && days<30){  price *= 0.8; }else if(days>=30 && days<150){  price *= 0.7; }else if(days>150){  price *= 0.6; } return price;  }} //汽车业务类public class Operation { public Vehicle[] vehicle = new Vehicle[8];//初始化汽车信息 public void init(){ vehicle[0] = new Car("京NY28588","宝马",800,"X6");  //vehicle v = new Car(); vehicle[1] = new Car("京CNY32584","宝马",600,"550i");  //vehicle v = new Car(); vehicle[2] = new Car("京NT37465","别克",300,"林荫大道");  //vehicle v = new Car(); vehicle[3] = new Car("京NT96968","别克",600,"GL8");  //vehicle v = new Car(); vehicle[4] = new Bus("京6566754","金杯",800,16);  //vehicle v = new Bus(); vehicle[5] = new Bus("京8696997","金龙",800,16);  //vehicle v = new Bus(); vehicle[6] = new Bus("京9696996","金杯",1500,34);  //vehicle v = new Bus(); vehicle[7] = new Bus("京8696998","金龙",1500,34);  //vehicle v = new Bus(); } //租车：根据用户提供的条件去汽车数组中查找相应车辆并返回 //如果租赁的是轿车  需要条件：品牌    型号 //如果租赁的是客车  需要条件：品牌    座位数 //简单工厂模式 public Vehicle zuChe(String brand,String type,int seatCount){ Vehicle che = null; //for循环遍历数组vehicle for(Vehicle myche : vehicle){  //判断Vehicle类的myche的类型是否和Car一样  if(myche instanceof Car){  //Vehicle类的myche向下转型变成子类Car  Car car = (Car)myche;  if(car.getBrand().equals(brand) && car.getType().equals(type)){   che=car;   break;  }  }else{  //Vehicle类的myche向下转型变成子类Bus  Bus bus = (Bus)myche;  if(bus.getBrand().equals(brand) && bus.getSeatCount() == seatCount){   che=bus;   break;  }  } } return che;  }} //汽车租赁public class Rent { public static void main(String[] args) { Scanner input = new Scanner(System.in); Operation operation = new Operation(); //租赁公司界面 operation.init(); System.out.println("**********欢迎光临租赁公司**********"); System.out.println("1.轿车/t/t2.客车"); System.out.println("请选择您要租赁的汽车类型：（1.轿车  2.客车）"); int cheType = input.nextInt(); String brand = "";//品牌 String type = "";//型号 int seatCount = 0;//座位数 //收集用户条件 if(cheType == 1){  //租赁轿车  System.out.println("请选择您要租赁的轿车品牌：（1.别克  2.宝马）");  int choose = input.nextInt();  if(choose == 1){  brand="别克";  System.out.println("请选择您要租赁的汽车型号：（1.林荫大道  2.GL8）");  type=(input.nextInt() == 1)?"林荫大道":"GL8";  }else if(choose == 2){  brand="宝马";  System.out.println("请选择您要租赁的汽车型号：（1.X6  2.550i）");  type=(input.nextInt() == 1)?"X6":"550i";  }   }else if(cheType == 2){  //租赁客车  type= "";  System.out.println("请选择您要租赁的客车品牌：（1.金杯  2.金龙）");  brand=(input.nextInt()==1)?"金杯":"金龙";  System.out.println("请选择您要租赁的客车座位数：（1.16座  2.32座）");  seatCount=(input.nextInt() == 1)?16:34;  } //租车 Vehicle che = operation.zuChe(brand, type, seatCount); System.out.println("请输入您的租赁天数："); int days = input.nextInt(); double money = che.calcRent(days); System.out.println("租车成功，请按照如下车牌号提车："+che.getId()); System.out.println("您需要支付："+money+"元"); } }