[이재훈_Backend] 1주차 제출합니다.

src/main/java/racingcar/Application.java

@@ -1,7 +1,140 @@
 package racingcar;
 
+import camp.nextstep.edu.missionutils.Console;
+import camp.nextstep.edu.missionutils.Randoms;
+
+import java.util.ArrayList;
+import java.util.List;
+
 public class Application {
     public static void main(String[] args) {
-        // TODO: 프로그램 구현
+        List<Car> cars = makeCars();
+        int tryCount = getTryCount();
+
+        System.out.println();
+        System.out.println("실행 결과");
+
+        for (int i = 0; i < tryCount; i++) {
+            moveCars(cars);
+            printCars(cars);
+        }
+
+        printWinners(cars);
+    }
+
+    private static List<Car> makeCars() {
+        System.out.println("경주할 자동차 이름을 입력하세요.(이름은 쉼표(,) 기준으로 구분)");
+        String input = Console.readLine();
+        String[] names = input.split(",");
+
+        List<Car> cars = new ArrayList<>();
+
+        for (String name : names) {
+            if (name.isEmpty()) {
+                throw new IllegalArgumentException();
+            }
+
+            if (name.chars().anyMatch(Character::isWhitespace)) {
+                throw new IllegalArgumentException();
+            }
+
+            if (name.length() > 5) {
+                throw new IllegalArgumentException();
+            }
+
+            checkDuplicate(cars, name);
+            cars.add(new Car(name));
+        }
+
+        return cars;
+    }
+
+    private static void checkDuplicate(List<Car> cars, String name) {
+        for (Car car : cars) {
+            if (car.getName().equals(name)) {
+                throw new IllegalArgumentException();
+            }
+        }
+    }
+
+    private static int getTryCount() {
+        System.out.println("시도할 회수는 몇회인가요?");
+        String input = Console.readLine();
+
+        int count;
+        try {
+            count = Integer.parseInt(input);
+        } catch (NumberFormatException e) {
+            throw new IllegalArgumentException();
+        }
+
+        if (count <= 0) {
+            throw new IllegalArgumentException();
+        }
+
+        return count;
+    }
+
+    private static void moveCars(List<Car> cars) {
+        for (Car car : cars) {
+            int number = Randoms.pickNumberInRange(0, 9);
+            if (number >= 4) {
+                car.move();
+            }
+        }
+    }
+
+    private static void printCars(List<Car> cars) {
+        for (Car car : cars) {
+            System.out.println(car.getName() + " : " + "-".repeat(car.getPosition()));
+        }
+        System.out.println();
+    }
+
+    private static void printWinners(List<Car> cars) {
+        int max = findMaxPosition(cars);
+        List<String> winners = new ArrayList<>();
+
+        for (Car car : cars) {
+            if (car.getPosition() == max) {
+                winners.add(car.getName());
+            }
+        }
+
+        System.out.println("최종 우승자 : " + String.join(", ", winners));
+    }
+
+    private static int findMaxPosition(List<Car> cars) {
+        int max = 0;
+
+        for (Car car : cars) {
+            if (car.getPosition() > max) {
+                max = car.getPosition();
+            }
+        }
+
+        return max;
+    }
+
+    static class Car {
+        private final String name;
+        private int position;
+
+        public Car(String name) {
+            this.name = name;
+            this.position = 0;
+        }
+
+        public void move() {
+            position++;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public int getPosition() {
+            return position;
+        }
     }
 }