게시판 연습(if문 제거 & for문 자동완성 적용)

import java.util.Scanner;

public class App {
Scanner scan = new Scanner(System.in);
Article[] articles = new Article[11];

public Article getArticle(int id) {
    return articles[id];
}

public void run() {
    for (int i = 0; i < articles.length; i++) {
        articles[i] = new Article();
    }

    int no = 0;
    while (true) {
        System.out.printf("명령어) ");
        String command = scan.nextLine();

        int id = no + 1;

        if (command.equals("add")) {
            System.out.println("==게시물 등록==");

            if (id >= articles.length) {
                System.out.println("더이상 저장할 수 없습니다.");
                continue;
            }            
            System.out.printf("제목: ");
            String sub = scan.nextLine();
            System.out.printf("내용: ");
            String con = scan.nextLine();
            System.out.println(id + "번 게시물에 저장되었습니다.");

            no = id;
            Article articles = getArticle(id);
            articles.sub = sub;
            articles.con = con;
            articles.no = no;

        }
        else if (command.equals("list")) {
            System.out.println("==게시물 리스트==");

            if (no == 0) {
                System.out.println("저장된 게시물이 없습니다.");
                continue;
            }

            System.out.println("번호 / 제목");
            for (int i = 1; i<= no; i++) {
                Article articles = getArticle(i);
                System.out.println(articles.no + " / " + articles.sub );                    
            }
        }
        else if (command.startsWith("detail ")) {
            int inputId = Integer.parseInt(command.split(" ")[1]);
            Article selArticle = getArticle(inputId);

            if (selArticle == null || selArticle.no == 0) {
                System.out.println(inputId + "번 게시물이 존재하지 않습니다.");
                continue;
            }
            System.out.println("==게시물 상세==");
            System.out.println("번호: " + selArticle.no);
            System.out.println("제목: " + selArticle.sub);
            System.out.println("내용: " + selArticle.con);
        }
        else if (command.equals("exit")) {
            System.out.println("==프로그램 종료==");
            break;
        }

        else {
            System.out.println("**명령어 오류");
        }

    }
    scan.close();
}

}