Advice 2.0

public class App {
    private static final BankingSystem bankingSystem = new BankingSystem();

    public static void main(String[] args) {
        bankingSystem.getCustomers().add(new Customer("Man", 100));
        bankingSystem.getCustomers().add(new Customer("Tom", 100));
        bankingSystem.getBankDetails();
        getAllCustomers();
    }

    private static void getAllCustomers() {
        for (Customer customer : bankingSystem.getCustomers()) {
            System.out.println("Name : " + customer.getName() + "\nBalance " + customer.getBalance() + "$\nAccountID " + new BigInteger(53, new Random()));
        }
    }
}


public class Customer {

    private final String name;
    private int balance;

    public Customer(String name, int balance){
        this.name = name;
        this.balance = balance;
    }

    public String getName() {
        return name;
    }

    public int getBalance() {
        return balance;
    }

    public void setBalance(int balance) {
        this.balance = balance;
    }
}


import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;

public class BankingSystem {
    private final Scanner input = new Scanner(System.in);
    private final String userInput = input.nextLine();
    private final ArrayList<Customer> customers = new ArrayList<>();

    public ArrayList<Customer> getCustomers() {
        return customers;
    }

    void getBankDetails() {
        boolean hasCustomer = false;
        for (Customer customer : customers) {
            hasCustomer = isCustomerPresent(hasCustomer, customer);
        }
        if(!hasCustomer){
            System.out.println("We don't have a customer with that name");
        }
    }

    private boolean isCustomerPresent(boolean haveCustomer, Customer value) {
        if (value.getName().equals(userInput)) {
            haveCustomer = true;
            atmActions(value);
            customerDetails(value);
        }
        return haveCustomer;
    }

    private void customerDetails(Customer value) {
        System.out.println("Name : " + value.getName() + "\nBalance " + value.getBalance() + "$\nAccountID" +  new BigInteger(53, new Random()));
    }

    void atmActions(Customer customer) {
        System.out.println("Hello " + customer.getName() + customerMessage());
        int atm = input.nextInt();
        while (atm != 3) {
            balanceModification(customer, atm);
            System.out.println(customerMessage());
            atm = input.nextInt();
        }
    }

private void balanceModification(Customer customer, int atm) {
        if (atm == 1) {
            depositMoney(customer);
        } else if (atm == 2) {
            withdrawMoney(customer);
        }
    }

    private String customerMessage() {
        return "\nIf you wish to deposit money press 1 \nIf you wish to withdraw money press 2\nTo exit press 3";
    }

    private void withdrawMoney(Customer customer) {
        System.out.println("How much do you want to withdraw?");
        int balance = input.nextInt();
        balance = balanceCondition(balance, customer.getBalance(), "You don't have enough money in the account.\nYour current balance is " + customer.getBalance());
        int withdraw = customer.getBalance() - balance;
        customer.setBalance(withdraw);
        System.out.println("Your current balance is $" + customer.getBalance());
    }

    private void depositMoney(Customer customer) {
        System.out.println("How much do you want to add to your account?");
        int balance = input.nextInt();
        int BALANCE_LIMIT = 999999999;
        balance = balanceCondition(balance, BALANCE_LIMIT, "You can not add that much money at once. Add below $999999999");
        int addingToBalance = customer.getBalance() + balance;
        customer.setBalance(addingToBalance);
        System.out.println("Your current balance is $" + customer.getBalance());
    }

    private int balanceCondition(int balance, int balanceLimit, String message) {
        while (balance > balanceLimit) {
            System.out.println(message);
            balance = input.nextInt();
        }
        return balance;
    }
}