[자동자 경주 게임] 이준섭 미션 제출합니다.

src/main/java/racingcar/Application.java

@@ -1,7 +1,120 @@
 package racingcar;
 
+import camp.nextstep.edu.missionutils.Console;
+
+import java.util.*;
+
 public class Application {
     public static void main(String[] args) {
-        // TODO 구현 진행
+        List<String> carNames = receiveCarNames();
+
+        List<Car> cars = createCars(carNames);
+
+        int tryCount = receiveTryCount();
+
+        runRacingGame(cars, tryCount);
+
+        printWinners(findWinners(cars));
+    }
+
+
+    private static List<String> receiveCarNames() {
+        List<String> carNames;
+        while (true) {
+            System.out.println("경주할 자동차 이름을 입력하세요. (이름은 쉼표(,) 기준으로 구분)");
+            String input = Console.readLine();
+            carNames = Arrays.asList(input.split(",", -1));
+            try { // 예외가 발생한다면? -> catch
+                validateCarNames(carNames); // 유효성 검사
+                break;
+            }
+            catch (IllegalArgumentException e) {
+                System.out.println("[ERROR] 올바른 형식의 자동차 이름을 입력하세요.");
+            }
+        }
+        return carNames;
+    }
+
+    private static void validateCarNames(List<String> carNames) {
+        for (String inputName : carNames) {
+            if (inputName.isEmpty() || inputName.length() > 5) {
+                throw new IllegalArgumentException();
+            }
+        }
+        Set<String> uniqueNames = new HashSet<>(carNames); // 중복을 허용하지 않는 자료구조
+        if (uniqueNames.size() < carNames.size()) { // 작다면 중복된 이름이 있다는 것을 의미함
+            throw new IllegalArgumentException();
+        }
+    }
+
+    private static int receiveTryCount() {
+        int tryCount;
+        while (true) {
+            System.out.println("시도할 횟수는 몇 회인가요?");
+            String input = Console.readLine();
+            try {
+                tryCount = Integer.parseInt(input); // 문자열을 정수로 변환하는 문법
+                validateTryCount(tryCount);
+                break;
+            }
+            catch (IllegalArgumentException e) {
+                System.out.println("[ERROR] 올바른 형식의 숫자를 입력하세요.");
+            }
+        }
+        return tryCount;
+    }
+
+    private static void validateTryCount(int tryCount) {
+        if (tryCount <= 0) {
+            throw new IllegalArgumentException();
+        }
+    }
+
+    private static List<Car> createCars(List<String> carNames) {
+        List<Car> cars = new ArrayList<>(); // 리스트 생성 후 리스트의 원소가 Car 클래스의 인스턴스가 되도록
+        for (String name : carNames) {
+            cars.add(new Car(name));
+        }
+        return cars;
+    }
+
+    private static void runRacingGame(List<Car> cars, int tryCount) {
+        System.out.println("\n실행 결과");
+        for (int i = 0; i < tryCount; i++) {
+            for (Car car : cars) {
+                car.moveForward();
+            }
+            printRoundResult(cars);
+        }
+    }
+
+    private static void printRoundResult(List<Car> cars) {
+        for (Car car : cars) {
+            System.out.println(car.getName() + " : " + new String(new char[car.getPosition()]).replace('\0', '-'));
+        }
+        System.out.println();
+    }
+
+    private static List<String> findWinners(List<Car> cars) {
+        int maxPosition = getMaxPosition(cars);
+        List<String> winners = new ArrayList<>();
+        for (Car car : cars) {
+            if (car.getPosition() == maxPosition) {
+                winners.add(car.getName());
+            }
+        }
+        return winners;
+    }
+
+    private static int getMaxPosition(List<Car> cars) {
+        int maxPosition = 0;
+        for (Car car : cars) {
+            maxPosition = Math.max(maxPosition, car.getPosition());
+        }
+        return maxPosition;
+    }
+
+    private static void printWinners(List<String> winners) {
+        System.out.println("최종 우승자 : " + String.join(", ", winners));
     }
 }

src/main/java/racingcar/Car.java

@@ -1,5 +1,7 @@
 package racingcar;
 
+import camp.nextstep.edu.missionutils.Randoms;
+
 public class Car {
     private final String name;
     private int position = 0;
@@ -8,5 +10,18 @@ public Car(String name) {
         this.name = name;
     }
 
-    // 추가 기능 구현
+    public void moveForward() {
+        int randomValue = Randoms.pickNumberInRange(0,9);
+        if (randomValue >= 4) {
+            position++;
+        }
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getPosition() {
+        return position;
+    }
 }