[숫자 야구 게임] 신우섭 미션 제출합니다.

src/main/java/baseball/Application.java

@@ -2,6 +2,7 @@
 
 public class Application {
     public static void main(String[] args) {
-        // TODO: 프로그램 구현
+        Game game = new Game();
+        game.gameStart();
     }
 }

src/main/java/baseball/Game.java

@@ -0,0 +1,105 @@
+package baseball;
+
+import camp.nextstep.edu.missionutils.Console;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class Game {
+    private static final int DIGITS = 3;
+    private static final String StartMessage= "숫자 야구 게임을 시작합니다.";
+    private static final String rePlayNum = "1";
+    private static final String ball = "볼 ";
+    private static final String strike = "스트라이크 ";
+    private static final String nothing = "낫싱";
+    private static final String Clear = "3개의 숫자를 모두 맞히셨습니다! 게임 종료";
+    private static final String rePlayQ = "게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.";
+
+    private boolean exitFlag = false;
+    private List<Integer> computer = new ArrayList<>();
+    private List<Integer> player = new ArrayList<>();
+    Number number = new Number();
+
+    public void gameStart() {
+        System.out.println(StartMessage);
+        computer = number.getRandomNumbers();
+        while (!exitFlag) {
+            player = number.getInputNumber();
+            printHint(computer, player);
+        }
+    }
+
+    private void rePlayMessage() {
+        String input = ReplayOrNot();
+        if (input.equals(rePlayNum)) {
+            computer = number.getRandomNumbers();
+            return;
+        }
+        exitFlag = true;
+    }
+
+    private String ReplayOrNot() {
+        System.out.println(rePlayQ);
+        String input = Console.readLine();
+        if (!RightAnswer(input)) {
+            throw new IllegalArgumentException();
+        }
+        return input;
+    }
+
+    private boolean RightAnswer(String input) {
+        Pattern pattern = Pattern.compile("[1-2]");
+        return pattern.matcher(input).matches();
+    }
+
+    private void printHint(List<Integer> answer, List<Integer> input) {
+        int strike = countStrike(answer, input);
+        int ball = countBall(answer, input);
+
+        System.out.println(getHint(strike, ball));
+        if (strike == DIGITS) {
+            System.out.println(Clear);
+            rePlayMessage();
+        }
+    }
+
+    private String getHint(int strike, int ball) {
+        StringBuilder sb = new StringBuilder();
+        if (strike != 0) {
+            if (ball != 0) {
+                sb.append(ball).append(ball).append(strike).append(strike).append("\n");
+                return sb.toString();
+            }
+            sb.append(strike).append(strike);
+            return sb.toString();
+        }
+        if (ball != 0) {
+            sb.append(ball).append(ball);
+            return sb.toString();
+        }
+        sb.append(nothing);
+        return sb.toString();
+    }
+
+    private int countStrike(List<Integer> answer, List<Integer> input) {
+        int count = 0;
+        for (int idx = 0; idx < answer.size(); idx++) {
+            if (answer.get(idx).equals(input.get(idx))) {
+                count++;
+            }
+        }
+        return count;
+    }
+
+    private int countBall(List<Integer> answer, List<Integer> input) {
+        int count = 0;
+        for (int idx = 0; idx < answer.size(); idx++) {
+            if (!answer.get(idx).equals(input.get(idx)) && input.contains(answer.get(idx))) {
+                count++;
+            }
+        }
+        return count;
+    }
+
+}

src/main/java/baseball/Number.java

@@ -0,0 +1,65 @@
+package baseball;
+
+import camp.nextstep.edu.missionutils.Console;
+import camp.nextstep.edu.missionutils.Randoms;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+public class Number {
+    private static final int NumberCount = 3;
+
+    public List<Integer> getRandomNumbers() {
+        Set<Integer> NumberSet = new HashSet<>();
+        while (NumberSet.size() < NumberCount) {
+            int randomNumber = Randoms.pickNumberInRange(1, 9);
+            NumberSet.add(randomNumber);
+        }
+        return new ArrayList<>(NumberSet);
+    }
+
+    public List<Integer> getInputNumber() {
+        System.out.print("숫자를 입력해주세요 : ");
+        String input = Console.readLine();
+        if (!isValidString(input)) {
+            throw new IllegalArgumentException();
+        }
+        return stringToList(input);
+    }
+
+    private List<Integer> stringToList(String str) {
+        return Arrays.stream(str.split("")).map(Integer::parseInt).collect(Collectors.toCollection(ArrayList::new));
+    }
+
+    private boolean isValidString(String input) {
+        if (!isNotDuplicate(input) || !isNumber(input) || !isThreeDigits(input)) {
+            return false;
+        }
+        return true;
+    }
+
+    private boolean isThreeDigits(String input) {
+        if (input.length() != NumberCount) {
+            return false;
+        }
+        return true;
+    }
+
+    private boolean isNumber(String str) {
+        String pattern = "^[0-9]*$";
+        return Pattern.matches(pattern, str);
+    }
+
+    private boolean isNotDuplicate(String str) {
+        Set<Character> set = new HashSet<>();
+        for (char num : str.toCharArray()) {
+            set.add(num);
+        }
+        return set.size() == str.length();
+    }
+}