我們可以用Java建立一個ATM程式來顯示ATM交易。自動櫃員機 (ATM) 或提款機（英式英語）是一種電子電信系統，允許銀行公司的客戶進行金融交易。使用者必須從 ATM 應用程式畫面上顯示的選項中進行選擇。例如，提款、存款、查看餘額、退出可用選項。
廣告 該類別中的熱門課程 JAVA 掌握 - 專業化 | 78 課程系列 | 15 次模擬測驗退出前要提取資金、存入資金以及查看帳戶餘額，需要在ATM程序中執行以下操作：
下面給出的是 Java 中的 ATM 程式的範例：
Java ATM 程式提款、存款、查詢餘額範例。
代碼：
package jex;
import java.util.*;
class ATM {
public static void main( String args[] ) {
//declare and initialize balance, withdraw, and deposit
int balance = 50000;
int withdraw, deposit;
//create scanner class object to get choice of user
Scanner sc = new Scanner(System.in);
while(true)
{
System.out.println( "Welcome to ATM ... " );
System.out.println( "Select 1 for Withdraw" );
System.out.println( "Select 2 for Deposit" );
System.out.println( "Select 3 for Check Balance" );
System.out.println( "Select 4 for EXIT" );
System.out.print( "Select the appropriate options you want to perform:" );
//get the user selected option
int op = sc.nextInt( );
switch( op )
{
case 1: System.out.print( "Enter the amount to be withdrawn :" );
// accept the withdraw amount from the user
withdraw = sc.nextInt();
//check whether the balance is greater than or equal to the withdrawal amount
withdraw( balance, withdraw);
break;
case 2: System.out.print( "Enter the amount to be deposited :" );
//accept the deposit amount from the user
deposit = sc.nextInt();
// call the function and add the deposit amount to the total balance
deposit( balance, deposit );
break;
case 3:
// printing the total balance of the user
printBalance( balance );
System.out.println(" ");
break;
case 4:
// exit from the menu
System.exit( 0 );
}
}
}
// function to print the current balance in an account
public static void printBalance(int balance)
{
System.out.println(" The Current Balance : " + balance);
System.out.println();
}
// The function to Withdraw an amount and update the balance
public static int withdraw(int balance, int withdrawAmount)
{
System.out.println( "Withdrawn Operation :" );
System.out.println("The withdrawing Amount is : " + withdrawAmount);
if (balance >= withdrawAmount) {
balance = balance - withdrawAmount;
System.out.println( "Please collect your money and remove the card" );
printBalance( balance );
}
else {
System.out.println( "Sorry! the balanace is insufficient." );
System.out.println( );
}
return balance;
}
// The function to deposit an amount and update the balance
public static int deposit(int balance, int depositAmount)
{
System.out.println( "Deposit Operation :" );
System.out.println(" The depositing amount is : " + depositAmount);
balance = balance + depositAmount;
System.out.println( "Your Money has been successfully deposited" );
printBalance(balance);
return balance;
}
}輸出：
上述提現操作程式碼的輸出為：
上述存款操作代碼的輸出為：
最後，上述存款操作代碼的輸出為：
如上面的程序，創建了 ATM 類，其中包含withdraw()、deposit() 和 printbalance() 函數。 withdraw()函數用於執行提現作業；此功能接受餘額和提款金額。在withdraw()函數中，首先檢查餘額是否大於取款金額；如果為真，則透過從餘額中減去提款金額來更新餘額。接下來，函數deposit()用於執行存款操作；此功能接受餘額和存款金額。
在deposit()函數中，它透過將存款金額加到餘額來更新餘額。接下來，printbalance()函數用於列印餘額；它接受餘額。然後，在主函數中，建立一個整數的餘額變數。接下來，根據案例要執行的特定選項選擇，列印用於取款、存款、餘額和退出操作的選擇 Piton，如我們在上面的輸出中看到的。
自動櫃員機 (ATM) 是一種電子電信系統，允許銀行公司的客戶進行金融交易。我們可以用Java建立ATM程式來顯示ATM交易，使用者可以提款、存款、查看餘額、退出ATM。
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