RandomUtils.java

package baseball.utils;
import camp.nextstep.edu.missionutils.Randoms;

public class RandomUtils {




        public static int[] getRandomNumbers(int size, int start, int end) {
            int[] numbers = new int[3];

            for (int i = 0; i < size; i++) {
                numbers[i] = getUniqueRandomNumber(numbers, start, end, i);
            }
            return numbers;
        }

        private static int getUniqueRandomNumber(int[] numbers, int start, int end, int i) {
            int randomNumber = Randoms.pickNumberInRange(start, end);
            while (!isUnique(numbers, i, randomNumber)) {
                randomNumber = Randoms.pickNumberInRange(start, end);
            }
            return randomNumber;
        }

        private static Boolean isUnique(int[] numbers, int i, int randomNumber) {
            for (int j = 0; j < i; j++) {
                if (numbers[j] == randomNumber) {
                    return false;
                }
            }
            return true;
        }
    }