What alternative wuld there be to using StreamTokenizer?

Question

Hello,
Currently I am using a StreamTokenizer to parse data from a file. The problem is that it goes way too slow. I'd like a faster way to process the data. If there is a better alternative to using StreamTokenizer I'd like to know. I've looked around and haven't found anything. I though using the java.nio stuff might help but now the I/O is faster in comparison to the BufferedReader, but the StreamTokenizer is keeping the I/O capabilities slow. The file sizes range from 9M - 20M and I need to find values and hold the data. I listed a very generic structure for the files I'm reading in below. I use the Headings(ex: [Values]) to sort through the data under the heading and then move on using the token.nextToken. If anyone could give me some ideas I'd appreciate it. Thank you in advance.
An Example:
[Values]
1 = "String1"
2 = "String2"
[Data Part1]
JOB_1 = 1021201212
PART_1 = 21231331
[TESTS]
T_000_= Data; Data;Data
through
T_1442 = Data; Data; Data

Answer 1

Currently I am using a StreamTokenizer to parsedata
from a file.Write a custom parser.
And if you parsing the same data more than once then
put the data into another format on the first parse so
it is faster on the subsequent tries.I think this would be your best bet right now. Because public static void mySimpleTokenizer()String s, String delimiter)
   String sub = null;
   int i =0;
   int j =s.indexOf(delimiter);  // First substring
   while( j >= 0) {
   sub = s.substring(i,j);
     i = j + 1;
     j = s.indexOf(delimiter, i);   // Rest of substrings
   sub = s.substring(i); // Last substring
}I read some where that the above method works almost 4 times faster than StringTokenizer, because of less overhead.
Also just wondering if the following links could be of any help
http://ostermiller.org/utils/StringTokenizer.html
http://www.javaperformancetuning.com/news/roundup032.shtml
http://www.ftponline.com/javapro/2002_08/online/servletsjsp_08_06_02/Java%20Servlets%20Ch16.pdf