random string method java
import java.util.Random;
public class Generator {
public static String generateRandomPassword(int len) {
String chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijk"
+"lmnopqrstuvwxyz!@#$%&";
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();
}
}