用eclipse写一个atm系统

好的，下面是一个简单的ATM系统的JAVA代码，使用Eclipse开发工具：

import java.util.Scanner;

public class ATMSystem {

    static Scanner input = new Scanner(System.in);
    static double balance = 10000;

    public static void main(String[] args) {

        System.out.println("Welcome to ATM System!");

        while (true) {
            System.out.println("Please select an option:");
            System.out.println("1. Check Balance");
            System.out.println("2. Withdraw");
            System.out.println("3. Deposit");
            System.out.println("4. Exit");

            int option = input.nextInt();

            switch (option) {
                case 1:
                    checkBalance();
                    break;
                case 2:
                    withdraw();
                    break;
                case 3:
                    deposit();
                    break;
                case 4:
                    System.out.println("Thank you for using ATM System!");
                    System.exit(0);
                    break;
                default:
                    System.out.println("Invalid option. Please select again.");
                    break;
            }
        }
    }

    public static void checkBalance() {
        System.out.println("Your balance is " + balance);
    }

    public static void withdraw() {
        System.out.println("Please enter the amount to withdraw:");
        double amount = input.nextDouble();

        if (amount > balance) {
            System.out.println("Insufficient balance. Please try again.");
        } else {
            balance -= amount;
            System.out.println("Successfully withdrawn " + amount + ". Your new balance is " + balance);
        }
    }

    public static void deposit() {
        System.out.println("Please enter the amount to deposit:");
        double amount = input.nextDouble();

        balance += amount;
        System.out.println("Successfully deposited " + amount + ". Your new balance is " + balance);
    }
}

这是一个简单的ATM系统，它允许用户检查余额、取款、存款和退出系统。当用户输入选项时，程序执行相应的操作。