RandomAccessFile.writeUTF(String)

Question

Hallo,
I have some problem with the method RandomAccessFile.writeUTF(String).
It writes a Character into the File and I don't know why.
I have to use the RandomAccessFile because I had to set the position of the FilePointer.
Here is the Testclass
public class UserFile
   public static void main(String[] args)
     try
        new UserFile().writeToFile();
     catch (IOException ioe)
       ioe.printStackTrace();
   }// end of main()
    private void writeToFile() throws IOException
        String sep = System.getProperty("line.separator");
        String kommentar = "This is a Comment";
        String user = "12.34.56.789";
        File dataFile = new File("user.dat");
        RandomAccessFile random = new RandomAccessFile(dataFile,"rw");
        random.seek(dataFile.length());
        String s = sep+"\\\\"+kommentar+sep+user;
        random.writeUTF(s);
        random.close();
    }// end of writeToFile()
}// end of classthe output is:
\\This is a Comment
12.34.56.789
the '#' Symbol is the char that I don't know where it comes from.
thank for your help
Hugo Balder

Answer 1

the RandomAccessFile.writeUTF(String) javadoc says:
"First, two bytes are written to the file, starting at the current file pointer, as if by the writeShort method giving the number of bytes to follow. This value is the number of bytes actually written out, not the length of the string. Following the length, each character of the string is output, in sequence, using the UTF-8 encoding for each character."
so RTFM, it helps