Read in X characters of a file

[rockies1]

I have a file that I need to process. Some of them are as large as several MB.

The file is a single line of data, each record being 450 bytes.

I've read files using this:

BufferedReader in = new BufferedReader(new FileReader( strTheFile ));
String strReadFromFile = null;
strReadFromFile = in.readLine ();

but that reads the entire line, in this case several MB of data.

How can I read in just the 450 bytes I need at a time?