Writing ASCII 0x81 to file with PrintStream

Question

Hello
I am trying to export textfiles to an other system (IBM AS400). But for that i need to convert some special characters. It works fine with most of the characters (i simply replace the characters in the String that i write to the File (String.replace(oldchar, newchar))
One character gives me trouble. I need to convert the char 0xFC to 0x81. But if i try to write this character to the File (I am using PrintWriter because i want to use the println(...) method) all i get in the File is the character 0x3F.
I tried different methods to write this char (0x81) but only if i use the OutputStream directly am I able to write 0x81 to the File.
Here is a sample code to illustrate my problem
public static void main(String[] args) {
        FileOutputStream fo = null;
        PrintStream p = null;
        //PrintWriter p = null; //if i use PrintWriter the problem is the same
        FileReader fi = null;
        BufferedReader d = null;
        String sampleFile = "c:\\only81.txt"; //contains 3 Lines of (char)0x81
        String outFile = "c:\\test.txt";
        try {
            fo = new FileOutputStream(outFile);
            p = new PrintStream(fo);
            fi = new FileReader(sampleFile);
            d = new BufferedReader(fi);
            p.println("Test to write ASCII 0x81 (129)");
            String temp = null;
            while ((temp = d.readLine()) != null)
                p.println(temp);  //all stored chars are 0x3F
            for (char i = 1; i<512; i++) //char 0x80-0x9F are all
                p.print(i);                     //stored as 0x3F (also chars>FF)
            p.flush();
            fo.write(129);     //these 4 lines actually work
            fo.write(0x81);
            fo.write((char)129);
            fo.write((char)0x81);
            d.close();
            fi.close();
            p.close();
            fo.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
    }What i would really like to understand is why there is the problem with the chars 0x80-0x9F (even my IDE (Eclipse)) has problems displaying the char in its Editor)
and how i can write 0x81 to a file (when 0x81 is part of a String)

Answer 1

You are writing with the default encoding, which is UTF-8Printwriter p = new PrintWriter(new OutputStreamWriter(new FileOutputStream(outFile), "ISO-8859-1"));will not have the same problem.
Use the same for readingBufferedReader d = new BufferedReader(new InputStreamReader(new FileInputStream(sampleFile), "ISO-8859-1"));