17.类和对象补充例子之ATM模拟

银行卡类
package com.company;

/**

• Created by ttc on 2017/12/29.
  */
  //银行卡类型
  public class UserCard {
  private String cardNo;//卡号
  private String password;//密码
  private String name;//户名
  private double money;//账户余额

public String toString()
{
    return "卡号是："+cardNo+"户名是："+name + "余额是："+money;
}

//存款
public double deposit(double money)
{
    this.money += money;
    return this.money;
}

//取款
public double withdraw(double money)
{
    //判断余额
    if(money > this.money)
    {
        return -1;
    }
    this.money -= money;
    return this.money;
}

//构造方法
public UserCard(String cardNo, String password,String name, double money)
{
    this.money = money;
    this.cardNo = cardNo;
    this.name = name;
    this.password = password;
}

public String getCardNo() {
    return cardNo;
}

public void setCardNo(String cardNo) {
    this.cardNo = cardNo;
}

public String getPassword() {
    return password;
}
//修改密码
public void setPassword(String password) {
    this.password = password;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public double getMoney() {
    return money;
}

public void setMoney(double money) {
    this.money = money;
}

}
ATM类
package com.company;

import java.util.Scanner;

/**

• Created by ttc on 2017/12/29.
  */
  public class ATM {
  //当前插入的卡
  private UserCard currentUserCard = null;

  private int index = 0;//数组的索引，下一个应该放到数组中的位置
  //ATM机可以识别的卡的集合
  private UserCard[] userCards = new UserCard[100];

  //向ATM中添加可以识别的卡片信息(让ATM机认这张卡)
  public void addUserCard(UserCard userCard)
  {
  if(index < userCards.length)
  {
  userCards[index] = userCard;
  index++;
  }

  }

  //输出atm首页界面
  public void print()
  {
  Scanner scanner = new Scanner(System.in);
  while (true)
  {
  System.out.println("----------------------");
  System.out.println("欢迎使用睿道java25出品的模拟ATM程序.");
  System.out.println("----------------------");

        System.out.println(" 1.>取款.");
        System.out.println(" 2.>存款.");
        System.out.println("3.>查询信息.");
        System.out.println("4.>退出系统.");
        int command = scanner.nextInt();
        switch (command)
        {
            case 1:
            {
                System.out.println("请输入取款金额");
                double value = scanner.nextDouble();
                double result = currentUserCard.withdraw(value);
                if(result == -1)
                {
                    System.out.println("余额不足");
                }
                else
                {
                    System.out.println("取款成功");
                    System.out.println("卡内余额为" + result);
                }
                break;
            }
            case 2:
            {
                System.out.println("请输入存款金额");
                double value = scanner.nextDouble();
                double result = currentUserCard.deposit(value);

                System.out.println("存款成功");
                System.out.println("卡内余额为" + result);

                break;
            }
            case 3:
            {
                System.out.println(currentUserCard);
                break;
            }
            case 4:
            {
                System.out.println("程序退出");
                return;
            }
            default:
            {
                break;
            }

        }

    }


}


//插卡
public void inputCard()
{
    System.out.println("请输入您的卡号:");
    Scanner scanner = new Scanner(System.in);
    String strNo = scanner.next();
    System.out.println("请输入您的密码:");
    String password = scanner.next();

    currentUserCard = checkCard(strNo,password);//检查卡
    if(currentUserCard != null)
    {
        print();
    }
    else
    {
        System.out.println("账号或密码错误");
    }
}

//检查卡是否合法,如果用户名密码对，返回那张有效的卡
public UserCard checkCard(String strNo, String password)
{
    //遍历有效的卡的数组，检查是否有和传入用户名，密码一致的卡存在
    for(int i = 0; i < index; i++)
    {
        if(strNo.equals(userCards[i].getCardNo()) && password.equals(userCards[i].getPassword()))
        {
            return userCards[i];
        }
    }

    return null;
}

}
主类
package com.company;

public class Main {

public static void main(String[] args) {
// write your code here
    String strName = "陈赫、陈坤、邓超、杜淳、冯绍峰、韩庚、胡歌、何炅、黄渤、黄晓明、贾乃亮、李晨、李易峰、鹿晗、井柏然、刘烨、陆毅、孙红雷、佟大为、薛之谦、王宝强、汪峰、王俊凯、王凯、王源、魏晨、文章、吴亦凡、小沈阳、徐峥、杨洋、张翰、张杰、张艺兴、郑恺";
    String[] arrays = strName.split("、");

    ATM atm = new ATM();

    for(int i = 0; i < arrays.length; i++)
    {
        UserCard userCard = new UserCard("00" + (i+1),"123",arrays[i], (Math.random()*100000)+1000000);
        atm.addUserCard(userCard);
    }

    //用户输入卡号
    atm.inputCard();

}

}

package haohao;

/**

• Created by ttc on 17-12-29.
  */
  public class Main {
  public static void main(String[] args) {
  // write your code here
  // UserCard userCard = new UserCard("001","123","zhangsan", 10);
  // UserCard userCard2 = new UserCard("002","123","lisi", 10);

   ATM atm = new ATM();
  
  
   UserCard userCard = new UserCard("001","123","zhangsan", 10);
   UserCard userCard2 = new UserCard("002","123","lisi", 10);
   atm.addUserCard(userCard);
   atm.addUserCard(userCard2);
  
   //用户输入卡号
   atm.inputCard();
  

  }
  }