Random.nextBytes() generating same byte sequence [duplicate]

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• What's the simplest way to print a Java array? 22 answers

I've basically generated a random bytes by calling random.nextBytes(bytes) function but whenever I am re-running this code, it's returning the same bytes, I want to have different bytes everytime I re-run the program.

Thanks in advance

import java.util.*;
import java.math.*;
import java.security.SecureRandom;

public class RandomDemo {
public static void main( String args[] ){
// create random object
SecureRandom randomno = new SecureRandom();

// create byte array
//byte[] nbyte = new byte[30];

// put the next byte in the array
byte[] bytes = new byte[20];
randomno.nextBytes(bytes);

// check the value of array
System.out.println("Value of byte array: " + bytes);

 }
}