regex parenthesis OR digit start of line

I'm new to regex and trying to get this statement to pass. What I'm trying to do is check the first character or two from the string.

I want to see that if it starts with a number then the statement will be true. I also want to check that if the first character is a "(" then i want to check that the next number is a digit too.

So far I've got:

if (str.matches("^[(?\d")){
return true;

but this doesn't seem to work. ^ for anchoring to start, (? to check for optional parenthesis and then check if it's a digit afterwards. How have i stuffed up?

So 0800, (0800, (09, 09, should pass where as *08, (*0, AB, (AB, *AB should fail.

Thanks