Program To Create a Lottery System in C++ Language Assignment Solution

import javax.swing.*;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.*;

import java.util.stream.Collectors;

public class lottery {

    private static final int N = 4;

    private static final int LOWER_BOUND = 0;

    private static final int UPPER_BOUND = 40;

    public List promptNumbers() {

        List result = new ArrayList<>();

        int curr = 0;

        while (curr < N) {

            try {

                String line = JOptionPane.showInputDialog("Please, input integer #" + (curr + 1) + " in range [" + LOWER_BOUND + ", " + UPPER_BOUND + "]: )");

                int parsed = Integer.parseInt(line);

                if (parsed < LOWER_BOUND || parsed > UPPER_BOUND || result.contains(parsed)) {

                    throw new IllegalArgumentException();

                }

                result.add(parsed);

                curr++;

            } catch (Exception e) {

                JOptionPane.showMessageDialog(null, "Invalid input");

            }

        }

        return result;

    }

    public List promptComputer() {

        return generateNumbers();

    }

    public List generateNumbers() {

        List result = new ArrayList<>();

        Random random = new Random();

        int curr = 0;

        while (curr < N) {

            int a = random.nextInt((UPPER_BOUND - LOWER_BOUND) + 1) + LOWER_BOUND;

            if (!result.contains(a)) {

                result.add(a);

                curr++;

            }

        }

        return result;

    }

    public int matches(List comb1, List comb2) {

        int count = 0;

        for (int a : comb1) {

            if (comb2.contains(a)) {

                count++;

            }

        }

        return count;

    }

    public void printResult(int tries, PrintWriter pw) {

        Mapresult = new HashMap<>();

        for (int i = 0; i < tries; i++) {

            List comb1 = promptComputer();

            List comb2 = generateNumbers();

            int matches = matches(comb1, comb2);

            pw.printf("%-20s%-20s%-20s%n", "Player #", "Winner #", "# Matched");

            pw.printf("%-20s%-20s%-20s%n", comb1.stream().map(j -> Integer.toString(j)).collect(Collectors.joining(" ")),

                    comb2.stream().map(j -> Integer.toString(j)).collect(Collectors.joining(" ")), matches);

            result.merge(matches, 1, Integer::sum);

        }

        pw.println();

        for (int i = 0; i <= N; i++) {

            pw.println("Match " + i + ": " + result.getOrDefault(i, 0));

        }

    }

    public static void main(String[] args) throws IOException {

        String filename = "output.txt";

        try (PrintWriter pw = new PrintWriter(filename)) {

            lottery lot = new lottery();

            lot.printResult(500, pw);

        }

    }

}