Java代碼~~汽車租賃系統

租車信息：

輸出結果：

 

代碼：

1、先定義抽象類（汽車類：Moto）

package cn.aura.demo01;

public abstract class Moto {
    //公共屬性
    private String id;//車牌號
    private String brand;//品牌
    private int preRent;//日租金
    //構造方法
    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;
    }
    //計算租金方法
    public abstract double  calRent(int days);
}

2.定義轎車類繼承汽車類

package cn.aura.demo01;
/**
 * 轎車類
 */
public class Car extends Moto{
    //私有屬性
    private String type;//型號
    //set和get方法
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    //構造方法
    public Car(String id, String brand, String type,int preRent) {
        super(id, brand, preRent);
        this.type = type;
    }
    
    //重寫計算租金的算法
    @Override
    public double calRent(int days) {
        if(days >0 && days <= 7) {
            //days小於7天，不打折
            return getPreRent()*days;
        }else if (days > 7 && days <= 30) {
            //days大於7天，9折
            return getPreRent()*days*0.9;
        }else if (days > 30 && days <= 150) {
            //days大於30天，8折
            return getPreRent()*days*0.8;
        }else if (days > 150) {
            //days大於150天，7折
            return getPreRent()*days*0.7;
        }
        return 0;
    }
}

3.定義客車類

package cn.aura.demo01;
/**
 * 客車類
 */
public class Bus extends Moto{
    //私有屬性
    private int seatCount;//座位數
    //set和get方法
    public int getSeatCount() {
        return seatCount;
    }
    public void setSeatCount(int seatCount) {
        this.seatCount = seatCount;
    }
    //構造方法
    public Bus(String id, String brand, int seatCount, int preRent) {
        super(id, brand, preRent);
        this.seatCount = seatCount;
    }
    //重寫計算租金的算法
    @Override
    public double calRent(int days) {
        if(days >0 && days <3) {
            //days小於3天，不打折
            return getPreRent()*days;
        }else if (days >= 3 && days < 7) {
            //days大於3天，9折
            return getPreRent()*days*0.9;
        }else if (days >= 7 && days <30) {
            //days大於3天，8折
            return getPreRent()*days*0.8;
        }else if (days >= 30 && days <150) {
            //days大於30天，7折
            return getPreRent()*days*0.7;
        }else if (days >= 150) {
            //days大於150天，6折
            return getPreRent()*days*0.6;
        }
        return 0;
    }
}

4.定義汽車業務類

package cn.aura.demo01;
/**
 * 定義汽車業務類
 */
public class MotoOperation {
    //初始化數組
    public static Moto[] motos = new Moto[8];
    //創建8個汽車對象
    public  void init() {
        motos[0] = new Car("京NY28558", "寶馬", "X6", 800);
        motos[1] = new Car("京CNY3284", "寶馬", "550i", 600);
        motos[2] = new Car("京NT37465", "別克", "林蔭大道", 300);
        motos[3] = new Car("京NT96968", "別克", "GL8", 600);
        motos[4] = new Bus("京6566754", "金杯", 16, 800);
        motos[5] = new Bus("京8696997", "金龍", 16, 800);
        motos[6] = new Bus("京9696996", "金杯", 34, 1500);
        motos[7] = new Bus("京8696998", "金龍", 34, 1500);
    }
    //租賃汽車的方法
    public  Moto motoLeaseOut(String brand,String type,int seat) {
         //for循環遍歷數組motos
         for(int i=0;i<motos.length;i++){
             if (brand.equals(motos[i].getBrand())) {
                // 判斷Moto類的motos[i]的類型是否和Car一樣
                if (motos[i] instanceof Car) {
                    // 強轉成小汽車Car
                    Car car = (Car) motos[i];
                    if (type.equals(car.getType())) {
                        return car;
                    }
                }
                if(motos[i] instanceof Bus){
                    // 強轉成大客車Bus
                    Bus bus = (Bus) motos[i];
                    if (seat == bus.getSeatCount()) {
                        return bus;
                    }
                }
            }
          
         }
         //如果沒有就返回空
         return null;
    }
}

5.定義測試類

package cn.aura.demo01;

import java.util.Scanner;

/**
 * 汽車租賃管理類
 */
public class TestRent {
    //主函數
    public static void main(String[] args) {
        MotoOperation motoOperation = new MotoOperation();
        // 初始化汽車
        motoOperation.init();
        //設置一個空容器
        Moto moto = null;
        // 提示信息
        System.out.println("***********歡迎光臨騰飛汽車租賃公司***********");
        System.out.println("1、轎車           2、客車");
        System.out.println("請輸入你要租賃的汽車類型：");
        // 獲取用戶輸入
        Scanner scanner = new Scanner(System.in);
        int flag = scanner.nextInt();
        if (flag == 1) {
            //轎車
            System.out.println("請選擇你要租賃的汽車品牌：1、別克   2、寶馬");
            int brand = scanner.nextInt();
            if (brand == 1) {
                System.out.println("請選擇你要租賃的汽車類型：1、林蔭大道  2、GL8");
                int type = scanner.nextInt();
                if (type == 1) {
                    moto = motoOperation.motoLeaseOut("別克", "林蔭大道", 4);
                } else if (type == 2) {
                    moto = motoOperation.motoLeaseOut("別克", "GL8", 4);
                }
            } else if (brand == 2) {
                System.out.println("請選擇你要租賃的汽車類型：1、X6  2、550i");
                int type = scanner.nextInt();
                if (type == 1) {
                    moto = motoOperation.motoLeaseOut("寶馬", "X6", 4);
                } else if (type == 2) {
                    moto = motoOperation.motoLeaseOut("別克", "550i", 4);
                }
            }
        } else if (flag == 2) {
            //客車
            System.out.println("請選擇你要租賃的汽車品牌：1、金龍   2、金杯");
            int brand = scanner.nextInt();
            if (brand == 1) {
                System.out.println("請選擇你要租賃的汽車座位數：1、16座  2、34座");
                int type = scanner.nextInt();
                if (type == 1) {
                    moto = motoOperation.motoLeaseOut("金龍", "", 16);
                } else if (type == 2) {
                    moto = motoOperation.motoLeaseOut("金龍", "", 34);
                }
            } else if (brand == 2) {
                System.out.println("請選擇你要租賃的汽車座位數：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);
                }
            }
        }
        //客戶汽車匹配完成
        if (moto != null) {
            // 獲取用戶租車天數
            System.out.println("請輸入您的租車天數：");
            int days = scanner.nextInt();
            // 計算租車錢
            double money = moto.calRent(days);
            System.out.println("分配給您的汽車牌號是：" + moto.getId());
            System.out.println("您需要支付的租賃費用是：" + money + "元");
        }else {
            System.out.println("很抱歉先生：當前的公司內，暫無您要的汽車類型！請重新選擇！");
        }
        
    }
        

}