JavaStudy07.java

gistfile1.txt

import javax.annotation.processing.Generated;
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;

public class JavaStudy07 {
        public static void main(String[] args) {
            Scanner scanner = new Scanner(System.in);

            System.out.print("로또 갯수를 입력해주세요(숫자 1~10):");
            int numOfTickets = scanner.nextInt();

            String[] lottoTickets = new String[numOfTickets];
            for (int i = 0; i < numOfTickets; i++) {
                lottoTickets[i] = generateLottoTicket();
            }


            System.out.println();
            int[] winningNumbers = generateLottoNumbers();


            printLottoNumbers(winningNumbers);

            System.out.println("\n[내 로또 결과]");
            for (int i = 0; i < numOfTickets; i++) {
                char ticketLabel = (char) ('A' + i);
                int matchCount = countMatchingNumbers(winningNumbers, extractNumbersFromTicket(lottoTickets[i]));
                System.out.println(ticketLabel + "     " + lottoTickets[i] + " => " + matchCount + "개일치");
            }

            scanner.close();
        }


        private static int[] generateLottoNumbers() {
            int[] lottoNumbers = new int[6];
            Random random = new Random();

            for (int i = 0; i < 6; i++) {
                int randomNumber;
                do {
                    randomNumber = random.nextInt(45) + 1; // 1부터 45까지의 난수 생성
                } while (contains(lottoNumbers, randomNumber)); // 중복된 번호 방지

                lottoNumbers[i] = randomNumber;
            }

            Arrays.sort(lottoNumbers); // 번호 정렬
            return lottoNumbers;
        }


        private static String generateLottoTicket() {
            int[] lottoNumbers = generateLottoNumbers();
            StringBuilder ticket = new StringBuilder();

            for (int i = 0; i < lottoNumbers.length; i++) {
                ticket.append(lottoNumbers[i]);
                if (i < lottoNumbers.length - 1) {
                    ticket.append(", ");
                }
            }

            return ticket.toString();
        }


        private static boolean contains(int[] array, int value) {
            for (int num : array) {
                if (num == value) {
                    return true;
                }
            }
            return false;
        }

        private static int countMatchingNumbers(int[] winningNumbers, int[] userNumbers) {
            int matchCount = 0;
            for (int userNumber : userNumbers) {
                if (contains(winningNumbers, userNumber)) {
                    matchCount++;
                }
            }
            return matchCount;
        }


        private static void printLottoNumbers(int[] lottoNumbers) {
            System.out.print("[로또 발표]\n");
            for (int i = 0; i < lottoNumbers.length; i++) {
                System.out.print(formatNumber(lottoNumbers[i]));
                if (i < lottoNumbers.length - 1) {
                    System.out.print(", ");
                }
            }
            System.out.println("\n");
        }


        private static String formatNumber(int number) {
            return String.format("%02d", number);
        }

        private static int[] extractNumbersFromTicket(String lottoTicket) {
            String[] numberStrings = lottoTicket.split(", ");
            int[] numbers = new int[numberStrings.length];

            for (int i = 0; i < numberStrings.length; i++) {
                numbers[i] = Integer.parseInt(numberStrings[i]);
            }

            return numbers;
        }


}