Thread: Variable Division Issues

I am trying to write code to monitor percentage progress of file transfers by dividing a running total by the total number of bytes in the file.

For some reason, when I divide the total by the total file bytes, I continuously get zero as a result.

total = long
percent = long
fileBytes = long

		int bytesRead;
		while((bytesRead = in.read(bytes))>0) {
			total+=bytesRead;
			percent = (long) ((total/fileBytes)*100);
			System.out.println(Double.toString(percent));
			buffout.write(bytes,0,bytesRead);
		}
		buffout.close();

I can't figure out why this is happening. Is the large number of file bytes outside of Java's range for longs?

In integer division: 4/5 = 0 & 5/3 = 1
There is no fractional part. Results are rounded to whole number.
Use float or double to get fractional parts.