step1

src/main/java/Lotto.java

@@ -0,0 +1,20 @@
+import java.util.Collections;
+import java.util.List;
+
+public class Lotto {
+    private List<Integer> numbers;
+
+    public Lotto(List<Integer> numbers) {
+        Collections.sort(numbers);
+        this.numbers = numbers;
+    }
+
+    public List<Integer> getNumbers() {
+        return numbers;
+    }
+
+    @Override
+    public String toString() {
+        return numbers.toString();
+    }
+}

src/main/java/LottoApp.java

@@ -0,0 +1,12 @@
+import java.util.List;
+
+public class LottoApp {
+    public static void main(String[] args) {
+        LottoMachine lottoMachine = new LottoMachine();
+        int purchaseAmount = lottoMachine.getPurchaseAmount();
+        int numberOfLottos = lottoMachine.calculateNumberOfLottos(purchaseAmount);
+        lottoMachine.printPurchaseInfo(numberOfLottos);
+        List<Lotto> lottos = lottoMachine.generateLottos(numberOfLottos);
+        lottoMachine.printLottos(lottos);
+    }
+}

src/main/java/LottoMachine.java

@@ -0,0 +1,47 @@
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Scanner;
+
+public class LottoMachine {
+    private static final int LOTTO_PRICE = 1000;
+    private static final int LOTTO_NUMBER_COUNT = 6;
+    private static final int LOTTO_MAX_NUMBER = 45;
+
+    public int getPurchaseAmount() {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("구입금액을 입력해 주세요.");
+        return scanner.nextInt();
+    }
+
+    public int calculateNumberOfLottos(int purchaseAmount) {
+        return purchaseAmount / LOTTO_PRICE;
+    }
+
+    public void printPurchaseInfo(int numberOfLottos) {
+        System.out.println(numberOfLottos + "개를 구매했습니다.");
+    }
+
+    public List<Lotto> generateLottos(int numberOfLottos) {
+        List<Lotto> lottos = new ArrayList<>();
+        for (int i = 0; i < numberOfLottos; i++) {
+            lottos.add(generateLotto());
+        }
+        return lottos;
+    }
+
+    private Lotto generateLotto() {
+        List<Integer> numbers = new ArrayList<>();
+        for (int i = 1; i <= LOTTO_MAX_NUMBER; i++) {
+            numbers.add(i);
+        }
+        Collections.shuffle(numbers);
+        return new Lotto(numbers.subList(0, LOTTO_NUMBER_COUNT));
+    }
+
+    public void printLottos(List<Lotto> lottos) {
+        for (Lotto lotto : lottos) {
+            System.out.println(lotto);
+        }
+    }
+}