Java实现答答租车系统 Java实现答答租车系统

时间:2021-03-30 希夏普人气:0

项目需求：

基本界面需求：

and:

最后是把账单打印出来：

个人代码实现

基本思路：考虑到车辆之间的共性，设置一个父类Car, 子类MannedCar(载人), Truck(载货)，BothCary(既载人又载货)，三者继承父类Car的price, name属性, getName()方法, 同时重写getPersonNum, getGoodsNum方法。

Car.java:

package Car;

public abstract class Car {
  protected int price;
  protected String name;
  protected int getPrice() {
    return price;
  }
  protected String getName() {
    return name;
  }
  public int getPersonNum() {
    // TODO Auto-generated method stub
    return 0;
  }
  public int getGoodsNum() {
    // TODO Auto-generated method stub
    return 0;
  }

}

MannedCar.java:

package Car;

public class MannedCar extends Car {
  private int personNum;

  public MannedCar() {
    this.personNum = 0;
    this.price = 0;
    this.name = "";
  }

  public MannedCar(int personNum, int price, String name) {
    this.personNum = personNum;
    this.price = price;
    this.name = name;
  }

  @Override
  public int getPersonNum() {
    return personNum;
  }
}

Truck.java:

package Car;

public class Truck extends Car{
  private int goodsNum;

  public Truck() {
    this.price = 0;
    this.goodsNum = 0;
    this.name = "";
  }

  public Truck(int price, int goodsNum, String name) {
    this.price = price;
    this.goodsNum = goodsNum;
    this.name = name;
  }

  @Override
  public int getGoodsNum() {
    return goodsNum;
  }
}

BothCarry.java:

package Car;

public class BothCarry extends Car {
  private int personNum;
  private int goodsNum;

  public BothCarry() {
    this.personNum = 0;
    this.goodsNum = 0;
    this.name = "";
    this.price = 0;
  }

  public BothCarry(int price, int personNum, 
      int goodsNum, String name) {
    this.personNum = personNum;
    this.goodsNum = goodsNum;
    this.price = price;
    this.name = name;
  }

  public int getPersonNum() {
    return personNum;
  }

  public int getGoodsNum() {
    return goodsNum;
  }
}

系统：

CarSystem.java:

package Car;

import java.util.Scanner;
import java.util.ArrayList;

public class CarSystem {

  private static String goodByeInfo = "欢迎再次使用本系统，再见！"; 
  private static int dayBorrow;

  public static void beginSystem() {
    CarSystem.SystemWelcome();
    Scanner scanner = new Scanner(System.in);
    String userCommand = scanner.next();


    switch(userCommand){
    case "1":
      CarSystem.getUserInput();
      break;
    case "0":
      System.out.println(goodByeInfo);
      break;
    default:
      System.out.println("输入错误..End running..");
      System.exit(0);
      break;
    }
  }

  public static void SystemWelcome() {
    System.out.println("欢迎使用答答租车系统:");
    System.out.println("您是否要租车: 1-是 0-否");
  }

  public static void getUserInput() {
    int numCarBorrow = 0;
    ArrayList<Car> carList = new ArrayList<Car>(6);
    carList.add(new MannedCar(4,500,"奥迪A4"));
    carList.add(new MannedCar(4,400,"马自达6"));
    carList.add(new BothCarry(450,4,2,"皮卡雪6"));
    carList.add(new MannedCar(20,800,"金龙"));
    carList.add(new Truck(400,4,"松花江"));
    carList.add(new Truck(1000,20,"依维河"));

    System.out.println("请输入您要租汽车的数量:");
    Scanner sr = new Scanner(System.in);

    numCarBorrow = sr.nextInt();

    int[] carNumList = new int[numCarBorrow];
    for(int i=0;i<numCarBorrow;i++) {
      System.out.println("请输入第" + (i+1) + "辆车的序号:");
      if (sr.hasNext()) {
        carNumList[i] = sr.nextInt();
      }
    }
    System.out.println("请输入租车天数:");
    if (sr.hasNext()) {
      dayBorrow = sr.nextInt();
    }
    sr.close();

    StringBuilder manned = new StringBuilder();
    int numOfManned = 0;
    StringBuilder goods = new StringBuilder();
    int numOfGoods = 0;
    int totalCost = 0;

    for(int i = 0;i < carNumList.length;i++) {
      if(carNumList[i]>0 && carNumList[i] < 3 || carNumList[i]==4) {
        manned.append("  ");
        manned.append(carList.get(carNumList[i]-1).getName());
        numOfManned += carList.get(carNumList[i]-1).getPersonNum();
      }
      else if(carNumList[i]==3) {
        manned.append("  ");
        manned.append(carList.get(carNumList[i]-1).getName());
        goods.append("  ");
        goods.append(carList.get(carNumList[i]-1).getName());
        numOfManned += carList.get(carNumList[i]-1).getPersonNum();
        numOfGoods += carList.get(carNumList[i]-1).getGoodsNum();
      }
      else {
        goods.append("  ");
        goods.append(carList.get(carNumList[i]-1).getName());
        numOfGoods += carList.get(carNumList[i]-1).getGoodsNum();
      }
      totalCost += carList.get(carNumList[i]-1).getPrice();
    }
    //Output
    System.out.println("您的账单:\n***可载人的车有:");
    System.out.println(manned + "  共载人: " + numOfManned); 
    System.out.println("***载货的车有:\n" + goods + "  共载货 : " + numOfGoods + "吨");
    System.out.println("***租车总价格: " + totalCost * dayBorrow + "元");

  }

}

主程序:

package Car;

public class CarSystemTest {

  public static void main(String[] args) {
    // TODO Auto-generated method stub
    CarSystem.beginSystem();
  }

}

运行结果：

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