Scanner.delimiter - how to get commas and full-stops back?

Hi, I am new to Java and am having a problem with a scanner I am using.

I managed to tokenize my input and scan it for integers via scanner.hasNextInt(). First I had a problem with i.e. commas after numbers, they were not recognized but I fixed this by using a useDelimiter(", *);

Now I have two new problems.

a) How do i set my useDelimiter to commas, fullstops, question marks at the same time?

b) The comma delimiter is now removed, I would like it back after I have done what I needed to do with the Integer, how do I do this? I tried something like !isWhitespace but I dont know where the char is within my string to do this?

Thanks!

First of all, unless you want the delimiters to count as tokens, the use of regular expressions is much better (split() method). When you make a new StringTokenizer(" ");, every character between " and " counts as a seperate delimiter, so
StringTokenizer st = new StringTokenizer(" ,./?!@#$%^&*()|;\"");
for example, each character counts as a delimiter. Hope that helped.
-MK12