How can I validate the range 1-99 using a regex?

Question

I need to validate some user input, to ensure a number entered is in the range of 1-99 inclusive. These must be whole (Integer) values

Preceeding 0 is permitted, but opt

Answer 1

String d = "11"

if (d.length() <= 2 && d.length() >=1) {
    try {
        Integer i = Integer.valueOf(d);
        return i <= 99 && i >= 0
    }
    catch (NumberFormatException e) {
        return false;
    }
}