[스프링 목요일 3팀] (이상훈) java-lotto 과제 제출합니다.

build.gradle

@@ -19,7 +19,7 @@ dependencies {
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(17)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }
 

src/main/java/lotto/Application.java

@@ -1,7 +1,139 @@
 package lotto;
 
+import org.kokodak.Randoms;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.*;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
 public class Application {
-    public static void main(String[] args) {
+    public static void main(String[] args) throws IOException {
         // TODO: 프로그램 구현
+
+        int lotto_price = 1000;
+
+        Scanner scanner = new Scanner(System.in);
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        // 로또 구입 금액 입력
+        //System.out.println("로또 구입 금액을 입력해주세요.");
+        System.out.println("Please enter the amount of lotto purchase.");
+
+        // int money = scanner.nextInt();
+        int money = Integer.parseInt(br.readLine());
+
+        // 로또 구입 금액이 1000원 단위가 아닐 때 예외 처리
+        if (money % 1000 != 0){
+            throw new IllegalArgumentException("[ERROR] This is not an appropriate value. Please check the amount again.");
+        }
+
+        // 로또 구입 결과 출력
+        int lotto_amount = money / 1000;
+        System.out.println("Purchased " + lotto_amount + " lotto");
+
+        List<List<Integer>> purchased_lotto = new ArrayList<>();
+
+        for (int i = 0; i < lotto_amount; i++){
+            List<Integer> RandomNumbers = Randoms.pickUniqueNumbersInRange(1, 45, 6);
+            Collections.sort(RandomNumbers);
+
+            purchased_lotto.add(RandomNumbers);
+        }
+
+        for (int i = 0; i < lotto_amount; i++){
+            System.out.println(purchased_lotto.get(i));
+        }
+
+        // 당첨 번호 입력
+        List<Integer> numbers = new ArrayList<>();
+
+        System.out.println("Please enter winning number.");
+
+        String str = br.readLine();
+        List<String> list = Arrays.asList(str.split(","));
+
+        // 당첨번호 7개 이상 입력 시 예외 처리
+        if (list.size() != 6){
+            throw new IllegalArgumentException("[ERROR] There are too many winning numbers.");
+        }
+
+        // 당첨번호 중복 입력 시 예외 처리
+        Set<String> listSet = new HashSet<>(list);
+
+        if (list.size() != listSet.size()) {
+            throw new IllegalArgumentException("[ERROR] There is a duplicate number.");
+        }
+
+        // 문자열 리스트 -> 정수형 리스트로 변환
+        for (String s : list){
+            numbers.add(Integer.parseInt(s));
+        }
+
+        // 입력된 당첨번호가 1~45 범위가 아닐 때 예외처리
+        for (Integer num : numbers){
+            if (num < 1 || num > 45){
+                throw new IllegalArgumentException("[ERROR] Invalid value.");
+            }
+        }
+
+        // 보너스 번호 입력
+        System.out.println("Please enter bonus number.");
+        str = br.readLine();
+        int bonus = Integer.parseInt(str);
+
+        // 보너스 번호 중복 시 예외 처리
+        for (int i = 0; i < numbers.size(); i++){
+            if (numbers.get(i) == bonus){
+                throw new IllegalArgumentException("[ERROR] There is a duplicate number.");
+            }
+        }
+
+        // 당첨 결과 계산
+        int income = 0;
+        int[] result = new int[5];
+        for (int i = 0; i < 5; i++)
+            result[i] = 0;
+
+        for (List<Integer> purchased_list : purchased_lotto){
+            List<Integer> matchList = purchased_list.stream().filter(o ->
+                    numbers.stream().anyMatch(Predicate.isEqual(o))).toList();
+
+            if (matchList.size() == 6) {
+                income += 2000000000;
+                result[0]++;
+
+            }
+            else if (matchList.size() == 5 && purchased_list.contains(bonus)) {
+                income += 30000000;
+                result[1]++;
+            }
+            else if (matchList.size() == 5) {
+                income += 1500000;
+                result[2]++;
+            }
+            else if (matchList.size() == 4) {
+                income += 50000;
+                result[3]++;
+            }
+            else if (matchList.size() == 3) {
+                income += 5000;
+                result[4]++;
+            }
+        }
+
+        // 당첨 결과 출력
+        System.out.println("winning statistics");
+        System.out.println("---");
+        System.out.println("Correct 3 (5,000) - " + result[4]);
+        System.out.println("Correct 4 (50,000) - " + result[3]);
+        System.out.println("Correct 5 (1,500,000) - " + result[2]);
+        System.out.println("Correct 5, Bonus (30,000,000) - " + result[1]);
+        System.out.println("Correct 6 (2,000,000,000) - " + result[0]);
+
+        float total_return = (float)income / (float)money * 100.0f;
+        System.out.println("Total Return : " + total_return + "%");
     }
 }

src/test/java/lotto/ApplicationTest.java

@@ -4,6 +4,7 @@
 import static org.kokodak.test.Assertions.assertRandomUniqueNumbersInRangeTest;
 import static org.kokodak.test.Assertions.assertSimpleTest;
 
+import java.io.IOException;
 import java.util.List;
 import org.junit.jupiter.api.Test;
 import org.kokodak.test.NsTest;
@@ -55,6 +56,10 @@ class ApplicationTest extends NsTest {
 
     @Override
     public void runMain() {
-        Application.main(new String[]{});
+        try {
+            Application.main(new String[]{});
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
     }
 }