Byte order mark screws up file reading in Java

Question

I\'m trying to read CSV files using Java. Some of the files may have a byte order mark in the beginning, but not all. When present, the byte order gets read along with the r

Answer 1

More simple solution:

public class BOMSkipper
{
    public static void skip(Reader reader) throws IOException
    {
        reader.mark(1);
        char[] possibleBOM = new char[1];
        reader.read(possibleBOM);

        if (possibleBOM[0] != '\ufeff')
        {
            reader.reset();
        }
    }
}

Usage sample:

BufferedReader input = new BufferedReader(new InputStreamReader(new FileInputStream(file), fileExpectedCharset));
BOMSkipper.skip(input);
//Now UTF prefix not present:
input.readLine();
...

It works with all 5 UTF encodings!