ATM program Java

2025年5月5日 | 阅读 2 分钟

在 Java 中，我们可以创建一个 ATM 程序来表示 ATM 交易。在 ATM 程序中，用户需要从屏幕上显示的选项中选择一个选项。这些选项与取款、存款、查询余额和退出相关。

要取款，我们只需从用户那里获取取款金额，然后从总余额中减去该金额，并打印成功消息。

要存款，我们只需从用户那里获取存款金额，将其加到总余额中，并打印成功消息。

要查询余额，我们只需打印用户的总余额。

我们使用 exit(0) 方法退出当前交易模式，并将用户返回到主页或初始屏幕。

ATMExample.java

//import required classes and packages 
import java.util.Scanner;

//create ATMExample class to implement the ATM functionality
public class ATMExample
{
	//main method starts 
    public static void main(String args[] )
    {
		//declare and initialize balance, withdraw, and deposit
        int balance = 100000, withdraw, deposit;
		
		//create scanner class object to get choice of user
        Scanner sc = new Scanner(System.in);
		
        while(true)
        {
            System.out.println("Automated Teller Machine");
            System.out.println("Choose 1 for Withdraw");
            System.out.println("Choose 2 for Deposit");
            System.out.println("Choose 3 for Check Balance");
            System.out.println("Choose 4 for EXIT");
            System.out.print("Choose the operation you want to perform:");
            
			//get choice from user
			int choice = sc.nextInt();
            switch(choice)
            {
                case 1:
		System.out.print("Enter money to be withdrawn:");
					
		//get the withdrawl money from user
		withdraw = sc.nextInt();
					
		//check whether the balance is greater than or equal to the withdrawal amount
		if(balance >= withdraw)
		{
			//remove the withdrawl amount from the total balance
			balance = balance - withdraw;
			System.out.println("Please collect your money");
		}
		else
		{
			//show custom error message 
			System.out.println("Insufficient Balance");
		}
		System.out.println("");
		break;
 
                case 2:
					
		System.out.print("Enter money to be deposited:");
					
		//get deposite amount from te user
		deposit = sc.nextInt();
					
		//add the deposit amount to the total balanace
		balance = balance + deposit;
		System.out.println("Your Money has been successfully depsited");
		System.out.println("");
		break;
 
                case 3:
		//displaying the total balance of the user
		System.out.println("Balance : "+balance);
		System.out.println("");
		break;
 
                case 4:
		//exit from the menu
		System.exit(0);
            }
        }
    }
}

输出