本文例項為大家分享了Java實現模擬ATM機的具體程式碼，供大家參考，具體內容如下

專案名稱

模擬ATM機

專案描述

簡單實現ATM機功能

程式碼實現

測試類

public class Test {
    //模擬多功能ATM機
  public static void main(String[] args) {
    ATM atm = new ATM();
    atm.opearte();
  }
}

主類：實現主方法

public class ATM {
  private Bank bank;
  public ATM(){
    bank = new Bank();
  }
  private void success(BankCard bankCard) {
    while (true) {
      System.out.println("請選擇：1、查詢餘額，2、取款，3、存款，4、轉賬，5、退卡");
      Scanner scanner = new Scanner(System.in);
      int choice = scanner.nextInt();
      if (choice == 5) {
        return;
      }
      switch (choice) {
        case 1:
          int money = bank.printf(bankCard);
          System.out.println("餘額：" + money);
          break;
        case 2:
          System.out.println("請輸入取款金額：");
          money = scanner.nextInt();
          bankCard.withdraw(money);
          break;
        case 3:
          System.out.println("請輸入存款金額：");
          money = scanner.nextInt();
          bankCard.deposit(money);
          break;
        case 4:
          System.out.println("請輸入對方賬戶id：");
          int id = scanner.nextInt();
          BankCard card = bank.transfer(id);
          if(card != null){
            System.out.println("請輸入轉賬金額：");
            money = scanner.nextInt();
            if(money <= bankCard.getMoney()){
              bankCard.withdraw(money);
              card.deposit(money);
            }else {
              System.out.println("轉賬失敗");
            }
          }else {
            System.out.println("未找到該賬戶");
          }
          break;
        default:
      }
    }
  }
  private void login(){ //登入
    System.out.println("請輸入賬號，密碼");
    Scanner scanner = new Scanner(System.in);
    int id = scanner.nextInt();
    int password = scanner.nextInt();
    BankCard bankCard = bank.search(id,password);
    if(bankCard != null){
      System.out.println("登入成功");
      success(bankCard);
    }else {
      System.out.println("登入失敗，請註冊");
    }
  }
  private void register(){ //註冊
    System.out.println("請輸入賬號，密碼");
    Scanner scanner = new Scanner(System.in);
    int id = scanner.nextInt();
    int password = scanner.nextInt();
    BankCard bankCard = bank.search(id,password);
    if(bankCard != null){
      System.out.println("該賬號已存在，請直接登入");
    }else {
      bank.addcard(id,password);
      System.out.println("註冊成功");
    }
  }
  public void opearte() {
    while (true) {
      System.out.println("請選擇：1、登入，2、註冊，3、退出");
      Scanner scanner = new Scanner(System.in);
      int choice = scanner.nextInt();
      if (choice == 3) {
        return;
      }
      switch (choice) {
        case 1:
          login();
          break;
        case 2:
          register();
          break;
        default:
      }
    }
  }
}

銀行類：一個銀行對應多個ATM機

public class Bank {
  private BankCard[] bankCards;
  private final int INITSIZE = 10;
  private int size;
  public Bank(){
    bankCards = new BankCard[INITSIZE];
    size = 0;
  }
  public BankCard search(int id,int password){ //搜尋
    BankCard[] bankCard = bankCards;
    for(int i=0;i<size;i++){
      if(bankCards[i].getId() == id && bankCards[i].getPassword() == password){
        return bankCard[i];
      }
    }
    return null;
  }
  public void addcard(int id,int password){ //註冊
    BankCard bankCard = new BankCard(id,password);
    if (size == bankCards.length){
      bankCards = Arrays.copyOf(bankCards,bankCards.length * 2);
    }
    bankCards[size++] = bankCard;
  }
  public int printf(BankCard bankCard){ //顯示餘額
     return bankCard.getMoney();
  }
  public BankCard transfer(int id){
    for(int i=0;i<size;i++){
      if(bankCards[i].getId() == id){
        return bankCards[i];
      }
    }
    return null;
  }
}

銀行卡類：不同賬戶的操作

public class BankCard {
  private int id;
  private int password;
  private int money;
  private int size = 0;
  public BankCard(int id,int password){
    this.id = id;
    this.password = password;
    money = 0;
  }
  public int getId(){
    return id;
  }
  public int getPassword(){
    return password;
  }
  public int getMoney(){
    return money;
  }
  public void withdraw(int money){ //取款
    if(this.money >= money){
      this.money -= money;
    }else {
      System.out.println("取款失敗");
    }
  }
  public void deposit(int money){ //存款
    this.money += money;
  }
}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。