String: Correct format +digits +hyphen

Question

I have a number in the following format (stored as a String):
01-000001
I would like to be able to make sure that above String contains a hyphen in the third character position, the string contains 9 characters total (including hyphen) and that everything except the hyphen is a digit (of numeric value).
Thanks in advance.

Answer 1

I have a number in the following format (stored as a
String):
01-000001
I would like to be able to make sure that above String
contains a hyphen in the third character position, the
string contains 9 characters total (including hyphen)
and that everything except the hyphen is a digit (of
numeric value).
Thanks in advance.Untested, and not necessarily syntactically correct, but...
boolean valid = (str.length() == 9);
if (valid) {
  valid = (str.charAt(2) == '-');
if (valid) {
  String first2 = str.substring(0, 2);
  try {
    Integer.parseInt(first2);
    String last6 = str.substring(3, 6);
    Integer.parseInt(last6);
  catch (NumberFormatException e) {
    valid = false;
}