How to draw tab key char into Graphics g as space?

Question

Hi, all.
following pg.drawString(token, 0, y); keep draw "\t" strange character like "o".
eg: "\tpublic static"--after draw..--> opublic static".
As you see below, I replace "\t" with " "(blankes).
I test replaceString method. it works fine.
but, once it draw it, it keep draw "o" string where the "\t" was.
What's problem?
//called for print.
public int print(Graphics pg, PageFormat pageFormat,
          int pageIndex) throws PrinterException {
//some code...
String tabReplace=" ";
StringTokenizer parser = new StringTokenizer(contents, "\n");
     try {
     while(parser.hasMoreTokens()) {
          String token=replaceString(parser.nextToken(), "\t", tabReplace);
          pg.drawString(token, 0, y);
          y+=fm.getHeight();
          y+=lineSpace;//lineSpace comes from use option               
     } catch (NoSuchElementException e) {
     System.out.println(e);
//some code..
     public String replaceString(String contents, String replace,
                                             String with){
          int indexHead=0, indexTail=0;
          while(( indexTail = contents.indexOf(replace, indexHead) ) >0){
               contents=contents.substring(indexHead, indexTail)+
                         with+contents.substring(indexTail+replace.length());
               indexHead+=with.length();
          return contents;
f

Answer 1

Any unprintable character draws the square 'o' on a graphics object, not only \t. Since your code is correct, it will replace away all \t in the string, means there are no \t left in the string. Since there is still unprintable character resident in the string, you need to check that the string that you draw is the correct one or which character that is unprintable. How about looping through the string and print the char-as-int to system int. Look for fairly low numbers < 32 and 127 as they would not be printable by normal means.
Regards,
Peter Norell