Day03-2 Board 클래스에 생성자와 메소드 선언하여 게시판관리 프로그램 만들기

Board 클래스

package day0111;

public class Board {
    private int id;
    private String title;
    private String writer;
    private String content;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getWriter() {
        return writer;
    }

    public void setWriter(String writer) {
        this.writer = writer;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public void printBoard() {
        System.out.println("-----------------------------------");
        System.out.println(title);
        System.out.println("-----------------------------------");
        System.out.println("번호: " + id);
        System.out.println("작성자: " + writer);
        System.out.println("-----------------------------------");
        System.out.println(content);
    }

    public boolean equals(Object o) {
        if (o instanceof Board) {
            Board b = (Board) o;
            return id == b.id;
        }

        return false;
    }
}

 

 

실행되는 클래스 

package day0111;

import util.ScannerUtil;

import java.util.Scanner;

public class Ex02Board {
    public static final Scanner SCANNER = new Scanner(System.in);
    public static Board[] boardArray = new Board[5];
    public static int nextId = 1;

    public static void main(String[] args) {
        showMenu();
    }

    public static void showMenu() {
        while (true) {
            String message = "1. 입력 2. 출력 3. 종료";
            int userChoice = ScannerUtil.nextInt(SCANNER, message);

            if (userChoice == 1) {
                writeBoard();
            } else if (userChoice == 2) {
                printList();
            } else if (userChoice == 3) {
                System.out.println("사용해주셔서 감사합니다.");
                break;
            }
        }
    }

    public static void writeBoard() {
        int nextIndex = findEmptyIndex();
        if (nextIndex >= boardArray.length) {
            System.out.println("더이상 작성하실 수 없습니다.");
        } else {
            Board b = new Board();
            String message;

            b.setId(nextId++);

            message = "글의 작성자를 입력해주세요.";
            b.setWriter(ScannerUtil.nextLine(SCANNER, message));

            message = "글의 제목을 입력해주세요.";
            b.setTitle(ScannerUtil.nextLine(SCANNER, message));

            message = "글의 내용을 입력해주세요.";
            b.setContent(ScannerUtil.nextLine(SCANNER, message));

            boardArray[nextIndex] = b;
        }
    }

    public static void printList() {
        if (findEmptyIndex() == 0) {
            System.out.println("아직 작성된 게시글이 없습니다.");
        } else {
            for (int i = 0; i < findEmptyIndex(); i++) {
                System.out.println(boardArray[i].getId() + ". " + boardArray[i].getTitle());
            }

            String message = "상세보기할 글의 번호나 뒤로 가실려면 0을 입력해주세요.";
            int userChoice = ScannerUtil.nextInt(SCANNER, message);

            while (userChoice != 0 && findIndexById(userChoice) == -1) {
                System.out.println("잘못 입력하셨습니다.");
                userChoice = ScannerUtil.nextInt(SCANNER, message);
            }

            if (userChoice != 0) {
                printOne(userChoice);
            }
        }
    }

    public static void printOne(int id){
        if(findIndexById(id) == -1){
            System.out.println("해당 id를 가진 게시글은 존재하지 않습니다.");
        }else {
            boardArray[findIndexById(id)].printBoard();
            String message = "1. 수정 2. 뒤로가기";
            int userChoice = ScannerUtil.nextInt(SCANNER, message);
            if(userChoice == 1){
                update(id);
            } else {
                printList();
            }
        }
    }

    public static void update(int id){
        int index = findIndexById(id);
        boardArray[index].setTitle(ScannerUtil.nextLine(SCANNER, "새로운 제목을 입력해주세요."));

        boardArray[index].setContent(ScannerUtil.nextLine(SCANNER, "새로운 내용을 입력해주세요."));

        printOne(id);
    }

    public static int findIndexById(int id) {
        for (int i = 0; i < boardArray.length; i++) {
            if (boardArray[i] != null && id == boardArray[i].getId()) {
                return i;
            }
        }

        return -1;
    }



    public static int findEmptyIndex() {
        for (int i = 0; i < boardArray.length; i++) {
            if (boardArray[i] == null) {
                return i;
            }
        }

        return boardArray.length;
    }

}