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File conversion - going wacky !

Dave Brown
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Joined: Mar 08, 2005
Posts: 301
Hi All,

I have a bunch of files I need to process, So far I thought the program i wrote was working correctly until I noticed that the chars I am reading & processing are not reflecting the true chars in the file.

For example.. My program gets to a certain point in the file which I know the byte on file is 0xD2.. Instead of D2 I get 3F. I am doing a little test here

if (cnt == 284) {
test.write((char)buffer[i]);
System.out.println("buffer = " + Integer.toString (buffer[i],16));
}

Just to see what the hex equiv of what it thinks its reading is, and the output is actually "-2e" minus the quotes.

I am reading the file in straight into a buffer using FileInputStream.

If anyone could shed some light on this that would be great, its bugging the hell out of me..

THanks,

Dave.


Regards, Dave Brown
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Dave Brown
Ranch Hand

Joined: Mar 08, 2005
Posts: 301
If this helps...

When reading one byte at time using in.read() the questionable byte is read in ok.

When i'm reading the bytes using in.read(buffer); the byte is changed, could the fileinputstream be doing some encoding ?
Dave Brown
Ranch Hand

Joined: Mar 08, 2005
Posts: 301
It appears the problem was to do with the way I was outputting data..

Using OuptputStreamWriter and chars.. when I switched to bytes and FileOutputStream, everything worked.
 
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