How to generate a random prime number in java

Consider the following program

import java.math.BigInteger;
import java.security.SecureRandom;
import java.util.Random;
public class RandomPrime
    {
    public static void main(String arg[])
        {
            Random ran = new SecureRandom();
            System.out.println(BigInteger.probablePrime(10, ran));
            }
    }

This program will generate a prime number randomly using the built-in function.
Save the program as RandomPrime.java