java create random uuid

/**
 * @author lautturi.com 
 * Java example: creating a random uuid in java
 */

import java.util.*;

import java.security.SecureRandom;
import java.util.UUID;

public class Lautturi {

	public static void main(String[] args) {
		
		long MSB = 0x8000000000000000L;
		SecureRandom numberGenerator = new SecureRandom();
		
        String uuid=  Long.toHexString(MSB | numberGenerator.nextLong()) + Long.toHexString(MSB | numberGenerator.nextLong());
        System.out.println(uuid);
		
	}
}

output:

86a712f1328f44abda9a61950a2ce81a