Account2.java

import java.util.Scanner;
public class Account2 {
    private String ano;
    private String owner;
    private int balance;

    public Account2(String ano, String owner, int balance) {
        this.ano = ano;
        this.owner = owner;
        this.balance = balance;
    }

    public String getAno() { return ano;}
    public void setAno(String ano) { this.ano = ano;}
    public String getOwner() { return  owner;}
    public void setOwner(String owner) { this.owner = owner;}
    public int getBalance() { return balance;}
    public void setBalance(int balance) {this.balance = balance;}
}

class BankApplication {
    private static Account2[]  accountArray = new Account2[100];
    private static Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {
        boolean run = true;
        while(run) {
            System.out.println("----------------------------------------------------------");
            System.out.println("1.계좌생성 | 2.계좌목록 | 3.예금 | 4.출금 | 5.종료");
            System.out.println("----------------------------------------------------------");
            System.out.print("선택> ");

            int selectNo = scanner.nextInt();

            if (selectNo == 1) {
                createAccount();
            } else if (selectNo == 2) {
                accountList();
            } else if (selectNo == 3) {
                deposit();
            } else if (selectNo == 4) {
                withdraw();
            } else if (selectNo == 5) {
                run = false;
            }
        }
        System.out.println("프로그램 종료");
    }

    private static void createAccount() {
        System.out.println("--------------");
        System.out.println("계좌생성");
        System.out.println("--------------");

        System.out.print("계좌번호: ");
        String ano = scanner.next();

        System.out.print("계좌주: ");
        String owner = scanner.next();

        System.out.print("초기입금액: ");
        int balance = scanner.nextInt();

        Account2 newAccount = new Account2(ano, owner, balance);
        for (int i = 0; i < accountArray.length; i++) {
            if (accountArray[i] == null) {
                accountArray[i] = newAccount;
                System.out.println("결과 : 계좌가 생성되었습니다.");
                break;
            }
        }
    }

    private static void accountList() {
        System.out.println("--------------");
        System.out.println("계좌목록");
        System.out.println("--------------");

        for (int i = 0; i < accountArray.length; i++) {
            Account2 account = accountArray[i];
            if (account != null) {
                System.out.print(account.getAno());
                System.out.print("     ");
                System.out.print(account.getOwner());
                System.out.print("     ");
                System.out.print(account.getBalance());
                System.out.println();
            }
        }
    }

    private static void deposit() {
        System.out.println("--------------");
        System.out.println("예금");
        System.out.println("--------------");
        System.out.print("계좌번호: ");
        String ano = scanner.next();
        System.out.println("예금액 : ");
        int money = scanner.nextInt();
        Account2 account = findAccount(ano);
        if (account == null) {
            System.out.println("결과 : 계좌가 없습니다.");
            return;
        }
        account.setBalance(account.getBalance() + money);
        System.out.println("결과 : 예금이 성공되었습니다.");
    }

    private static void withdraw() {
        System.out.println("--------------");
        System.out.println("출금");
        System.out.println("--------------");
        System.out.print("계좌번호: ");
        String ano = scanner.next();
        System.out.print("출금액: ");
        int money = scanner.nextInt();
        Account2 account = findAccount(ano);
        if (account == null) {
            System.out.println("결과 : 계좌가 없습니다.");
            return;
        }
        account.setBalance((account.getBalance() - money));
        System.out.println("결과 : 출금이 성공되었습니다.");

    }

    private static Account2 findAccount(String ano) {
        Account2 account = null;
        for (int i = 0; i <accountArray.length; i++) {
            if (accountArray[i] != null) {
                String dbAno = accountArray[i].getAno();
                if (dbAno.equals(ano)) {
                    account = accountArray[i];
                    break;
                }
            }
        }
        return account;
    }
}