MainAccount.java

import java.util.Scanner;

public class MainAccount {
    private String ano;
    private String owner;
    private int balance;

    public MainAccount(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 MainAccount[] accountArray = new MainAccount[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");
    }

    //계좌생성하기
    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();

        MainAccount newAccount = new MainAccount(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;
            }
        }
    }

    //계좌목록보기
    private static void accountList() {
        System.out.println("--------------");
        System.out.println("계좌목록");
        System.out.println("--------------");
        for(int i=0; i<accountArray.length; i++) {
            MainAccount 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();
            }
        }
    }

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

    //출금하기
    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();
        MainAccount account = findAccount(ano);
        if(account == null) {
            System.out.println("결과: 계좌가 없습니다.");
            return;
        }
        account.setBalance(account.getBalance() - money);
        System.out.println("결과: 출금이 성공되었습니다.");
    }

    //Account 배열에서 ano와 동일한 Account 객체 찾기
    private static MainAccount findAccount(String ano) {
        MainAccount 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;
    }
}