Create card shuffling system in Java

Shuffling a deck of cards

// Java Code for 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]+" ");
        
    }
}

Here’s an example of what the output might look like after shuffling the deck:

12 6 23 48 25 18 8 3 42 35 22 50 30 7 5 19 27 4 11 41 28 47 26 45 14 38 40 16 29 24 21 46 13 2 36 43 10 31 49 32 33 39 44 15 1 34 37 9 20 17 0 51