[Feat] 로또 만들기

src/main/java/lotto/BuyingLotto.java

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+package lotto;
+
+import camp.nextstep.edu.missionutils.Console;
+
+public class BuyingLotto {
+    static int lottoCount;
+
+    public BuyingLotto() {
+        buyLotto();
+    }
+
+    private void buyLotto() {
+        boolean validInput = false;
+
+        while (!validInput) {
+            try {
+                System.out.println("구입금액을 입력해 주세요.");
+                String input = Console.readLine();
+                int money = Integer.parseInt(input);
+                validateInput(money);
+                lottoCount = money / 1000;
+                System.out.println(lottoCount + "개를 구매했습니다.");
+                validInput = true;
+            } catch (IllegalArgumentException e) {
+                System.out.println("[ERROR] 금액은 1000원 단위여야 합니다. 다시 입력해 주세요.");
+            }
+        }
+    }
+
+    public int getLottoCount() {
+        return lottoCount;
+    }
+
+    private void validateInput(int money) {
+        if (money % 1000 == 0) return;
+        throw new IllegalArgumentException();
+    }
+
+}

src/main/java/lotto/LottoCreator.java

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+package lotto;
+
+import camp.nextstep.edu.missionutils.Randoms;
+
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+public class LottoCreator {
+    private List<Lotto> lottoList;
+
+    public LottoCreator(int count) {
+        createLotto(count);
+    }
+
+    private void createLotto(int count) {
+        lottoList = IntStream.range(0, count)
+                .mapToObj(i -> new Lotto(LottoNumberGenerator.generateLottoNumber()))
+                .collect(Collectors.toList());
+
+    }
+
+    public List<Lotto> getLottoList() {
+        return lottoList;
+    }
+}

src/main/java/lotto/LottoNumberGenerator.java

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+package lotto;
+
+import camp.nextstep.edu.missionutils.Randoms;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Random;
+
+public class LottoNumberGenerator {
+    private static final int MAX_NUM = 45;
+    private static final int MIN_NUM = 1;
+    private static final int COUNT = 6;
+
+    private LottoNumberGenerator() {
+        throw new UnsupportedOperationException("Utility class");
+    }
+
+    public static List<Integer> generateLottoNumber() {
+        List<Integer> numbers = Randoms.pickUniqueNumbersInRange(MIN_NUM, MAX_NUM, COUNT);
+        Collections.sort(numbers);
+        return numbers;
+    }
+}