java generate a random unique key

/**
 * @author lautturi.com 
 * Java example: get a random unique key in java
 */

import java.util.*;

public class Lautturi {

	public static void main(String args[]) {
		
		String key = UUID.randomUUID().toString();
		System.out.println("unique key:"+key);

		System.out.println("unique key:"+key.replace("-", ""));
	}
}

output:

unique key:9d6750a3-9589-46a7-9408-dfceaf0494fa
unique key:9d6750a3958946a79408dfceaf0494fa