public static String generateValues(int n)
{
String alphabet1 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
String alphabet2 = "abcdefghijklmnopqrstuvwxyz";
String digits = "0123456789";
String values = alphabet1 + alphabet2 + digits;
Random random = new Random(1);
String s = "";
for(int count = 0; count < n; count++) {
s += String.valueOf(values.charAt(random.nextInt(values.length())));
}
return s;
}