[객체 지향 설계 및 디자인 패턴 실전 tdd 스터디] 조성연 프리코스 1차 과제 제출입니다.

src/main/java/baseball/Application.java

@@ -1,7 +1,40 @@
 package baseball;
+import camp.nextstep.edu.missionutils.Console;
+
+import java.util.List;
+
+import static baseball.utils.DataUtils.convertToIntList;
+import static baseball.utils.DataUtils.generateRandomNumbers;
+import static baseball.utils.IOUtils.getResult;
+import static baseball.utils.IOUtils.validateInput;
 
 public class Application {
     public static void main(String[] args) {
-        // TODO: 프로그램 구현
+        boolean playAgain = true;
+        while (playAgain) {
+            List<Integer> computerNumbers = generateRandomNumbers();
+            boolean gameOver = false;
+
+            System.out.println("숫자 야구 게임을 시작합니다.");
+
+            while (!gameOver) {
+                System.out.print("숫자를 입력해주세요 : ");
+                String userInput = Console.readLine();
+
+                validateInput(userInput);
+                List<Integer> userNumbers = convertToIntList(userInput);
+                Boolean is3Strike = getResult(computerNumbers, userNumbers);
+                if (is3Strike) {
+                    gameOver = true;
+                    System.out.println("3개의 숫자를 모두 맞히셨습니다! 게임 종료");
+                }
+            }
+
+            System.out.println("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.");
+            String choice = Console.readLine();
+            if (choice.equals("2")) {
+                playAgain = false;
+            }
+        }
     }
 }

src/main/java/baseball/utils/DataUtils.java

@@ -0,0 +1,29 @@
+package baseball.utils;
+
+import camp.nextstep.edu.missionutils.Randoms;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+public class DataUtils {
+    public static List<Integer> generateRandomNumbers() {
+        List<Integer> computer = new ArrayList<>();
+        while (computer.size() < 3) {
+            int randomNumber = Randoms.pickNumberInRange(1, 9);
+            if (!computer.contains(randomNumber)) {
+                computer.add(randomNumber);
+            }
+        }
+        return computer;
+    }
+
+    public static List<Integer> convertToIntList(String input) {
+        List<Integer> numbers = new ArrayList<>();
+        for (int i = 0; i < 3; i++) {
+            numbers.add(input.charAt(i) - '0');
+        }
+        return numbers;
+    }
+}

src/main/java/baseball/utils/IOUtils.java

@@ -0,0 +1,47 @@
+package baseball.utils;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+public class IOUtils {
+    public static void validateInput(String input) {
+        if (input.length() != 3) {
+            throw new IllegalArgumentException();
+        }
+        Set<Character> charSet = new HashSet<>();
+        for (char ch : input.toCharArray()) {
+            if (!Character.isDigit(ch) || ch == '0' || !charSet.add(ch)) {
+                throw new IllegalArgumentException();
+            }
+        }
+    }
+
+    public static Boolean getResult(List<Integer> computerNumbers, List<Integer> userNumbers) {
+        int strikes = 0;
+        int balls = 0;
+        String result = "";
+
+        for (int i = 0; i < 3; i++) {
+            if (userNumbers.get(i).equals(computerNumbers.get(i))) {
+                strikes++;
+            } else if (computerNumbers.contains(userNumbers.get(i))) {
+                balls++;
+            }
+        }
+
+        if (strikes == 3) {
+            result = "3스트라이크";
+            System.out.println(result);
+            return true;
+        }
+
+        if (strikes == 0 && balls == 0) {
+            result = "낫싱";
+        } else {
+            result = balls + "볼 " + strikes + "스트라이크";
+        }
+        System.out.println(result);
+        return false;
+    }
+}