Question

Create a JAVA lottery game application.  Generate four random numbers, each between 0 and 9 (inclusive).  Allow the user to guess four numbers.  Compare each of the user’s guesses to the four random numbers and display a message that includes the user’s guess, the randomly determined four-digit number, and the amount of points the user has won as follows:

No matches	0 points
Any one digit matching	5 points
Any two digits matching	100 points
Any three digits matching	2,000 points
All four digits matching	1,000,000 points

Answer 1

import java.text.NumberFormat;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Scanner;

public class Lottery {

    /*

    Method to check whether x is present in values array.

    */

    public static boolean contains_number(int[] values, int x)

    {

        for(int num: values)

        {

            if(num == x)

            {

                return true;

            }

        }

        return false;

    }

   

    public static void main(String[] args)

    {

        int correct_guesses = 0;

        int total_score = 0;

        int[] random_nums = new int[4];

        int[] guesses = new int[4];

        // Asking user to guess four numbers

        System.out.println("------------------------------------------");

        System.out.println("\t\tLOTTERY GAME\t\t");

        System.out.println("------------------------------------------");

        System.out.println("Guess the four numbers between 0 and 9: ");

        for(int i=0; i<4; i++)

        {

            Scanner sc = new Scanner(System.in);

            guesses[i] = sc.nextInt();

        }

        ArrayList numbers = new ArrayList();

        for(int i=0; i<=9; i++)

        {

            numbers.add(i);

        }

        // Shuffling the arraylist containing values to create random numbers

        Collections.shuffle(numbers);

        // Taking out first 4 numbers randomly

        for(int i=0; i<4; i++)

        {

            int random_num = (int) numbers.get(i);

            random_nums[i] = random_num;

            // Checking whether one of the guessed number matches with random number.

            // if matches, increase the correct guess count

            if(contains_number(guesses, random_num))

            {

                correct_guesses++;

            }

        }

        // Calculating the user score

        switch(correct_guesses)

        {

            case 0:

                total_score = 0;

                break;

            case 1:

                total_score = 5;

                break;

            case 2:

                total_score = 100;

                break;

            case 3:

                total_score = 2000;

                break;

            case 4:

                total_score = 1000000;

                break;

            default:

                break;

        }

        // Dispalying the user guessed and randomly generated numbers

        System.out.print("The user guessed numbers are: ");

        for(int num: guesses)

        {

            System.out.print(String.valueOf(num) + " ");

        }

        System.out.println();

        System.out.print("The randomly generated numbers are: ");

        for(int num: random_nums)

        {

            System.out.print(String.valueOf(num) + " ");

        }

        System.out.println();

        // Printing total score of the user

        System.out.println("Total score is " + NumberFormat.getIntegerInstance().format(total_score) + " points.");

    }

   

}

OUTPUT