All accented charaters are turned into question marks

Question

I have a file that has accented charaters: ÇÍââÇÍ

I need to change them into ISO-8859-15 encoding

The code:

    String fileName = "C:/Users/User/AppData/Local/Temp/temp6893820181068878551.txt";

    File file = new File(fileName);
    FileInputStream fin = new FileInputStream(file);

    FileChannel ch = fin.getChannel();
    int size = (int) ch.size();
    MappedByteBuffer buf = ch.map(FileChannel.MapMode.READ_ONLY, 0, size);

     byte[] utf8bytes = new byte[size];
    buf.get(utf8bytes);

    System.out.println(new String(utf8bytes));  

    System.out.println();
    System.out.println();

        Charset utf8charset = Charset.forName("UTF-8");
        Charset iso88591charset = Charset.forName("ISO-8859-15");

        String string = new String ( utf8bytes, utf8charset );
        System.out.println(string);
        System.out.println();
        System.out.println();

        byte[] iso88591bytes = string.getBytes(iso88591charset);

        for ( byte b : iso88591bytes )
            System.out.printf("%02x ", b);

        System.out.println();
        System.out.println();

        String string2 = new String ( iso88591bytes, iso88591charset );

        System.out.println(string2);

But I get as output:

ÇÍââÇÍ


??????


3f 3f 3f 3f 3f 3f 

??????

Answer 1

I found the solution!

The problem was the file itself.

When writing to the original file, it must be in encoding UTF-8.