Java Program to Implement Naor-Reingold Pseudo Random Function

// Java Program to Implement Naor-Reingold
// Pseudo Random Function
import java.util.*;
public class Main {
    public static void randomNumbers()
    {
        // Creating arrays and defining variables
        int p = 7, l = 2, g = 3, n = 6, x;

        int a[] = { 1, 2, 2, 1 };

        int arr[] = new int[4];

        Random random = new Random();

        int num = 10;
        System.out.println("The Random numbers are: ");

        // Generating Random Numbers using
        // Naor-Reingold Pseudo Random Function approach
        for (int i = 0; i < num; i++) {
            x = random.nextInt(num) % 16;

            for (int j = 3; j >= 0; j--) {
                arr[j] = x % 2;
                x /= 2;
            }
            int mult = 1;

            for (int k = 0; k < 4; k++) {
                mult *= Math.pow(a[k], arr[k]);
            }
            System.out.print(Math.pow(g, mult) + ", ");
        }
    }
    public static void main(String args[])
    {
        randomNumbers();
    }
}