Thank you for your attention!
Yes, the file's logical record has a fixed format, and each record size is 215 bytes.
In that case, can I read in 4.76GB file using Scanner class? I did not know about Scanner class until I saw your comment here by the way as I still use SDK1.4.
If so, could you post a sample Scanner usage for handling huge file of one big line like I have?
Thanks again.