Java random password generator

/**
 * @author lautturi.com 
 * Java example: generate a random password in java
 */

import java.util.*;

public class Lautturi {
	public static String generateRandomPassword(int len) {
		String chars = "0123456789"
				+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
				+ "abcdefghijklmnopqrstuvwxyz"
				+ "!@#$%&-=+";
		Random rnd = new Random();
		StringBuilder sb = new StringBuilder(len);
		for (int i = 0; i < len; i++)
			sb.append(chars.charAt(rnd.nextInt(chars.length())));
		return sb.toString();
	}
	
	public static void main(String[] args) {
		String password = generateRandomPassword(12);
		System.out.println(password);
	}
}

output:

QoFRlautturi