Change so that I can print .txt or .rtf

Hi All,
I have tested this program below using a .gif and it works
successfully.
I want to change it so that I can print a notepad.txt or wordpad.rtf.

TIA,
bH

     import java.io.*;
    import javax.print.*;
    import javax.print.attribute.*;
    import javax.print.attribute.standard.*;
    import javax.print.event.*;

    public class BasicPrint {
        public static void main(String[] args) {
            try {
                // Open the image file
                InputStream is = new BufferedInputStream(
                    new FileInputStream("BIGbggrn01.gif"));

                // Find the default service
                DocFlavor flavor = DocFlavor.INPUT_STREAM.GIF;
                PrintService service =
PrintServiceLookup.lookupDefaultPrintService();

                // Create the print job
                DocPrintJob job = service.createPrintJob();
                Doc doc = new SimpleDoc(is, flavor, null);

                // Monitor print job events; for the implementation of
PrintJobWatcher,

                PrintJobWatcher pjDone = new PrintJobWatcher(job);

                // Print it
                job.print(doc, null);

                // Wait for the print job to be done
                pjDone.waitForDone();

                // It is now safe to close the input stream
                is.close();
            } catch (PrintException e) {
            } catch (IOException e) {
            }
        }
    }
class PrintJobWatcher {
  // true iff it is safe to close the print job's input stream
  boolean done = false;

  PrintJobWatcher(DocPrintJob job) {
    // Add a listener to the print job
    job.addPrintJobListener(new PrintJobAdapter() {
      public void printJobCanceled(PrintJobEvent pje) {
        allDone();
      }
      public void printJobCompleted(PrintJobEvent pje) {
        allDone();
      }
      public void printJobFailed(PrintJobEvent pje) {
        allDone();
      }
      public void printJobNoMoreEvents(PrintJobEvent pje) {
        allDone();
      }
      void allDone() {
        synchronized (PrintJobWatcher.this) {
          done = true;
          PrintJobWatcher.this.notify();
        }
      }
    });
  }
  public synchronized void waitForDone() {
    try {
      while (!done) {
        wait();
      }
    } catch (InterruptedException e) {
    }
  }
}