Shuffle Deck of Cards Java

PROGRAM TO SHUFFLE A DECK OF CARDS

import java.util.Random;

  

class GFG {

      

    // Function which shuffle and print the array

    public static void shuffle(int card[], int n)

    {

          

        Random rand = new Random();

          

        for (int i = 0; i < n; i++)

        {

            // Random for remaining positions.

            int r = i + rand.nextInt(52 - i);

              

             //swapping the elements

             int temp = card[r];

             card[r] = card[i];

             card[i] = temp;

               

        }

    }

       

    // Driver code

    public static void main(String[] args) 

    {

        // Array from 0 to 51

        int a[] = {0, 1, 2, 3, 4, 5, 6, 7, 8,

                   9, 10, 11, 12, 13, 14, 15,

                   16, 17, 18, 19, 20, 21, 22,

                   23, 24, 25, 26, 27, 28, 29,

                   30, 31, 32, 33, 34, 35, 36,

                   37, 38, 39, 40, 41, 42, 43,

                   44, 45, 46, 47, 48, 49, 50, 

                   51};

       

        shuffle(a, 52);

       

        // Printing all shuffled elements of cards

        for (int i = 0; i < 52; i ++)

           System.out.print(a[i]+" ");

          

    }

}




OUTPUT

29 27 20 23 26 21 35 51 15 18 46 32 33 19 
24 30 3 45 40 34 16 11 36 50 17 10 7 5 4 
39 6 47 38 28 13 44 49 1 8 42 43 48 0 12 
37 41 25 2 31 14 22

Note : Output will be different each time because of the random function used in the program.