private static final String ALPHA_NUMERIC_STRING = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
public static String randomAlphaNumeric(int count) {
StringBuilder builder = new StringBuilder();
while (count-- != 0) {
int character = (int)(Math.random()*ALPHA_NUMERIC_STRING.length());
builder.append(ALPHA_NUMERIC_STRING.charAt(character));
}
return builder.toString();
}