Name: mc57594 Date: 01/28/97


combining a PrintWriter and a TextArea results in mangled
        output in a textarea. This does not happen under the JDK1.1b3
        for Solaris. I've included an example source, listed below.
--8<-----------------------------------------------------------------------
/*
 * TextAreaBug.java
 *
 * Copyright (C) 1997 Raymond Penners
 *
 * Time-stamp: <97/01/26 15:06:03 raymondp>
 */

/* java version "JDK1.1beta3.3" on Windows'95:

   Run it and press "test" repeatedly. You will see some text being
   appended in the TextArea, but you'll also notice that sometimes
   garbage appears. This does _not_ happen under JDK1.1b3 for Solaris.
*/
   
  
import java.awt.*;
import java.awt.event.*;
import java.io.*;

class TextAreaWriter extends Writer
{
  TextArea textArea;
  
  public TextAreaWriter (TextArea txt)
  {
    textArea = txt;
  }

  public void write (char b[], int off, int len)
  {
    String s = new String (b, off, len);
    textArea.append (s);
  }

  public void flush ()
  {
  }

  public void close ()
  {
  }
}

class TextAreaBug extends Frame implements ActionListener
{
  TextArea textArea;
  TextAreaWriter twout;
  PrintWriter out;

  public TextAreaBug ()
  {
    super ();
    setSize (600,400);
    setTitle ("Press TEST repeatedly to see garbled output");
    
    setLayout (new BorderLayout ());

    textArea = new TextArea ();
    twout = new TextAreaWriter (textArea);
    out = new PrintWriter (twout);
    add (textArea);
    
    Panel toolbar = new Panel ();
    toolbar.setLayout (new FlowLayout (FlowLayout.LEFT));
    Button testButton = new Button ("test");
    testButton.addActionListener (this);
    Button quitButton = new Button ("quit");
    quitButton.addActionListener (this);
    toolbar.add (testButton);
    toolbar.add (quitButton);
    add ("North", toolbar);

  }


  public void actionPerformed (ActionEvent e)
  {
    String s = e.getActionCommand ();
    if (s.equals ("test"))
      {
out.println ("");
out.println ("Garbage appears mostly at beginning/end of lines.");
out.println ("");
out.println ("Please press TEST\nsome more and you");
out.println ("will see\n garbage appearing\n among this text");
      }
    else if (s.equals ("quit"))
      System.exit (0);
  }

  public static void main (String args[])
  {
    TextAreaBug frame = new TextAreaBug ();
    frame.setVisible (true);
  }
}

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