java - java中具有多个类的银行帐户客户端

Question

我正在尝试制作一个银行帐户程序，但我不知道如何使我的所有变量对我拥有的每个类都可见，或者如何使我的代码的取款和存款方法可见。任何人都可以查看我的代码并告诉我出了什么问题吗？我只想在客户端类中输入和输出。

谢谢

客户端类

public class Client {
  public static void main(String args[]) {
    Scanner input = new Scanner(System.in);       
    System.out.println("Enter your Name: ");
    String cusName = input.nextLine();
    System.out.println("Enter Account Type: ");
    String type = input.next();
    System.out.println("Enter Initial Balance: ");
    int bal = input.nextInt();
    BankAccount b1 = new BankAccount(cusName, num, type, bal);
    int menu;
    System.out.println("Menu");
    System.out.println("1. Deposit Amount");
    System.out.println("2. Withdraw Amount");
    System.out.println("3. Display Information");
    System.out.println("4. Exit");
    boolean quit = false;
    do {
      System.out.print("Please enter your choice: ");
      menu = input.nextInt();
      switch (menu) {
      case 1:
        b1.deposit();
        break;

      case 2:
        b1.withdraw();
        System.out.println("Current Account Balance=" + Balance);
        System.out.print("Enter withdrawal amount:");
        amount = input.nextInt();
        break;

      case 3:
        b1.display();
        break;

      case 4:
        quit = true;
        break;
      }
    } while (!quit);
  }
}

货币类

public class Money
{

  static int accountNumber, Balance, amount;
  Scanner input = new Scanner(System.in);
  static String name, actype;
  public int deposit() {
    System.out.print("Enter depost amount:");
    amount = input.nextInt();
    if (amount < 0) {
      System.out.println("Invalid");
      return 1;
    }
    Balance = Balance + amount;
    return 0;
  }

  int withdraw()  {

    if (Balance < amount) {
      System.out.println("Not enough funds.");
      return 1;
    }
    if (amount < 0) {
      System.out.println("Invalid");
      return 1;
    }
    Balance = Balance - amount;
    return 0;
  }

}

银行账户类

class BankAccount {
  Scanner input = new Scanner(System.in);
  static String name, actype;
  static int bal, amt;
  Random randomGenerator = new Random();
  int accNo = randomGenerator.nextInt(100);

  BankAccount(String name, int accNo, String actype, int bal) {
    this.name = name;
    this.accNo = accNo;
    this.actype = actype;
    this.bal = bal;
  }
  void display() {
    System.out.println("Name:" + name);
    System.out.println("Account No:" + accNo);
    System.out.println("Balance:" + bal);

  }

  void dbal() {
    System.out.println("Balance:" + bal);
  }
}

Answer 1

1. 将 Money 添加到您的 BankAccount 并创建一个 getter 方法，如下所示:

   class BankAccount {
      Scanner input = new Scanner(System.in);
      static String name, actype;
      static int bal, amt;
      Random randomGenerator = new Random();
      int accNo = randomGenerator.nextInt(100);
      Money money;
   
      BankAccount(String name, int accNo, String actype, int bal) {
       this.name = name;
       this.accNo = accNo;
       this.actype = actype;
       this.bal = bal;
       this.money = new Money();
     }
   
     public Money getMoney(){
        return this.money;
     }
     .....
   }
   

2. 使用bankaccount.getMoney()调用deposit和withdraw:

    b1.getMoney().deposit();
    b1.getMoney().withdraw();
   

此外，我建议将 Money 类属性设置为，例如amount、accntType...非静态并通过构造函数设置。静态变量与类定义相关联，因此您无法按银行帐户维护它们。