显示 ATM 交易的Java程序

让我们构建一个Java程序来表示 ATM 交易，其中用户必须从屏幕上显示的选项中选择输入。屏幕上的可用选项包括提款、存款、余额等操作。

以下是ATM中可用的基本操作

1. 提取
2. 订金
3. 查看余额
4. 出口

每个选项的方法

A. 退出：

1. 将用户希望提取的金额作为输入。
2. 如果余额金额大于或等于提款金额，则执行交易并给用户所需的金额。
3. 否则打印资金不足消息。

B. 存款：

1. 将用户希望存入的金额作为输入。
2. 添加从用户接收到的输入以平衡和更新其值。
3. 余额 = 余额 + 存款。
4. 在屏幕上打印一条消息，说明存款交易已成功。

C. 检查余额：

• 在屏幕上打印一条消息，显示余额金额的值。

D、退出：

• 退出当前交易模式并将用户返回到主页或初始屏幕。

下面是上述方法的实现。

Java

// Java Program to Display the ATM Transaction
import java.io.*;
public class GFG {
  
    // Display current balance in account
    public static void displayBalance(int balance)
    {
        System.out.println("Current Balance : " + balance);
        System.out.println();
    }
  
    // Withdraw amount and update the balance
    public static int amountWithdrawing(int balance,
                                        int withdrawAmount)
    {
        System.out.println("Withdrawn Operation:");
        System.out.println("Withdrawing Amount : "
                           + withdrawAmount);
        if (balance >= withdrawAmount) {
            balance = balance - withdrawAmount;
            System.out.println(
                "Please collect your money and collect the card");
            displayBalance(balance);
        }
        else {
            System.out.println("Sorry! Insufficient Funds");
            System.out.println();
        }
        return balance;
    }
  
    // Deposit amount and update the balance
    public static int amountDepositing(int balance,
                                       int depositAmount)
    {
        System.out.println("Deposit Operation:");
        System.out.println("Depositing Amount : "
                           + depositAmount);
        balance = balance + depositAmount;
        System.out.println(
            "Your Money has been successfully deposited");
        displayBalance(balance);
        return balance;
    }
  
    public static void main(String args[])
    {
        int balance = 10000;
        int withdrawAmount = 5000;
        int depositAmount = 2000;
  
        // calling display balance
        displayBalance(balance);
        // withdrawing amount
        balance
            = amountWithdrawing(balance, withdrawAmount);
        // depositing amount
        balance = amountDepositing(balance, depositAmount);
    }
}

输出

Current Balance : 10000

Withdrawn Operation:
Withdrawing Amount : 5000
Please collect your money and collect the card
Current Balance : 5000

Deposit Operation:
Depositing Amount : 2000
Your Money has been successfully deposited
Balance : 7000

时间复杂度： O(1)