[송세일] 숫자야구 제출합니다.

README.md

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+### 기능 목록
+
+- 컴퓨터 랜덤 숫자 3개 만들기
+  - 중복되는 숫자 있는지 체크, 있을 경우 다시 생성
+
+
+
+- 게임 시작
+  - 플레이어 3개 숫자 입력하기
+  - 자릿수 계산하기
+    - 모두 맞지 않았다면 결과를 출력하고 다시 플레이어 숫자 입력 받음
+    - 모두 맞췄다면 성공 메시지 출력함
+  - 게임을 새로 시작할지 여부에 따른 분기 처리
+

src/main/java/Main.java

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+import controller.BaseballConsole;
+
+public class Main {
+    public static void main(String[] args) {
+        BaseballConsole baseballConsole = new BaseballConsole();
+        baseballConsole.start();
+    }
+}

src/main/java/constant/Message.java

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+package constant;
+
+public final class Message {
+    public static final String INPUT_NUMBER_MESSAGE = "숫자를 입력해주세요 : ";
+    public static final String INCORRECT_DIGIT_MESSAGE = "세 자리 수를 입력해야 합니다.";
+    public static final String DUPLICATE_DIGIT_MESSAGE = "중복되는 수가 존재합니다.";
+    public static final String STRIKE_MESSAGE = " 스트라이크 ";
+    public static final String BALL_MESSAGE = "볼";
+    public static final String NO_STRIKE_NO_BALL_MESSAGE = "낫싱";
+    public static final String SUCCESS_MESSAGE = "3개의 숫자를 모두 맞히셨습니다! 게임 종료" + System.lineSeparator() + "게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.";
+}

src/main/java/controller/BaseballConsole.java

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+package controller;
+import constant.Message;
+import domain.Computer;
+import domain.Result;
+import domain.User;
+import service.BaseballService;
+
+import java.util.Scanner;
+
+public class BaseballConsole {
+    private Scanner scanner;
+    private Computer computer;
+    private User user;
+    private Result result;
+    private BaseballService baseballService;
+
+    public BaseballConsole() {
+        this.scanner = new Scanner(System.in);
+        this.computer = new Computer();
+        this.user = new User();
+        this.result = new Result();
+        this.baseballService = new BaseballService();
+    }
+
+    public void start() {
+        while (true) {
+            baseballService.setRandomNumber(computer);
+
+            enterNumber();
+            selectMenu();
+        }
+    }
+
+    public void enterNumber() {
+        while (true) {
+            try {
+                System.out.print(Message.INPUT_NUMBER_MESSAGE);
+                user.inputNumberToString(scanner);
+                result = baseballService.getGameResult(computer, user);
+                printGameResult(result);
+                if (result.isThreeStrike()) {
+                    break;
+                }
+            } catch (Exception e) {
+                System.out.println(e.getMessage());
+            }
+        }
+    }
+
+    private void selectMenu() {
+        System.out.println(Message.SUCCESS_MESSAGE);
+
+        int selectMenuNum = scanner.nextInt();
+
+        switch (selectMenuNum) {
+            case 1 :
+                break;
+            case 2 :
+                System.exit(0);
+        }
+    }
+
+    private void printGameResult(Result result) {
+        int strike = result.getStrike();
+        int ball = result.getBall();
+
+        if (strike > 0)
+            System.out.print(strike + Message.STRIKE_MESSAGE);
+        if (ball > 0)
+            System.out.print(ball + Message.BALL_MESSAGE);
+        if (strike == 0 && ball == 0)
+            System.out.print(Message.NO_STRIKE_NO_BALL_MESSAGE);
+        System.out.println("");
+    }
+}

src/main/java/domain/Computer.java

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+package domain;
+
+public class Computer {
+    private String computerNum;
+
+    public void makeRandomNumberToString(int randomNumber) {
+        this.computerNum = String.valueOf(randomNumber);
+    }
+
+    public boolean notExistsDuplicateDigit() {
+        return (computerNum.charAt(0) != computerNum.charAt(1)) &&
+                (computerNum.charAt(0) != computerNum.charAt(2)) &&
+                (computerNum.charAt(1) != computerNum.charAt(2));
+    }
+
+    public String getComputerNum() {
+        return computerNum;
+    }
+}

src/main/java/domain/Result.java

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+package domain;
+
+public class Result {
+    private int strike;
+    private int ball;
+
+    public Result() {
+        this.strike = 0;
+        this.ball = 0;
+    }
+
+    public void plusStrike() {
+        this.strike++;
+    }
+
+    public void plusBall() {
+        this.ball++;
+    }
+
+    public int getStrike() {
+        return strike;
+    }
+
+    public void setStrike(int strike) {
+        this.strike = strike;
+    }
+
+    public int getBall() {
+        return ball;
+    }
+
+    public void setBall(int ball) {
+        this.ball = ball;
+    }
+
+    public boolean isThreeStrike() {
+        return this.strike == 3;
+    }
+}

src/main/java/domain/User.java

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+package domain;
+
+import constant.Message;
+
+import java.util.Scanner;
+
+public class User {
+    private String userNum;
+
+    public void inputNumberToString(Scanner scanner) throws Exception {
+        this.userNum = String.valueOf(scanner.nextInt());
+
+        if (notNumberLengthIsThree()) {
+            throw new Exception(Message.INCORRECT_DIGIT_MESSAGE);
+        } else if (existsDuplicateDigit()) {
+            throw new Exception(Message.DUPLICATE_DIGIT_MESSAGE);
+        }
+    }
+
+    public boolean notNumberLengthIsThree() {
+        return this.userNum.length() != 3;
+    }
+
+    public boolean existsDuplicateDigit() {
+        return (userNum.charAt(0) == userNum.charAt(1)) ||
+                (userNum.charAt(0) == userNum.charAt(2)) ||
+                (userNum.charAt(1) == userNum.charAt(2));
+    }
+
+    public String getUserNum() {
+        return userNum;
+    }
+}

src/main/java/service/BaseballService.java

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+package service;
+
+import domain.Computer;
+import domain.Result;
+import domain.User;
+
+import java.util.Random;
+
+public class BaseballService {
+    public void setRandomNumber(Computer computer) {
+        Random random = new Random();
+
+        while (true) {
+            computer.makeRandomNumberToString(random.nextInt(900) + 100);
+            if (computer.notExistsDuplicateDigit())
+                break;
+        }
+        System.out.println("computerNum : " + computer.getComputerNum());
+    }
+
+    public Result getGameResult(Computer computer, User user) {
+        Result gameResult = calculateGameResult(computer, user);
+        return gameResult;
+    }
+
+    private Result calculateGameResult(Computer computer, User user) {
+        String userNum = user.getUserNum();
+        String computerNum = computer.getComputerNum();
+        Result gameResult = new Result();
+
+        for (int i=0; i<userNum.length(); i++) {
+            int userDigit = userNum.charAt(i);
+            int computerDigit = computerNum.charAt(i);
+
+            if (isStrike(userDigit, computerDigit)) {
+                gameResult.plusStrike();
+            } else if (isBall(userDigit, computer)) {
+                gameResult.plusBall();
+            }
+        }
+
+        return gameResult;
+    }
+
+    private boolean isStrike(int userDigit, int computerDigit) {
+        return userDigit == computerDigit;
+    }
+
+    private boolean isBall(int userDigit, Computer computer) {
+        String computerNum = computer.getComputerNum();
+
+        for (int i=0; i<computerNum.length(); i++) {
+            int computerDigit = computerNum.charAt(i);
+            if (userDigit == computerDigit) {
+                return true;
+            }
+        }
+        return false;
+    }
+}