import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

// This appears in Core Web Programming from
// Prentice Hall Publishers, and may be freely used
// or adapted. 1997 Marty Hall, hall@apl.jhu.edu.

/** A listener used to send identical text to
 *  two text areas. Used in the Mirror class below.
 */

class MirrorListener extends KeyAdapter {
  private TextArea area1, area2;

  public MirrorListener(TextArea area1,
                        TextArea area2) {
    this.area1 = area1;
    this.area2 = area2;
  }

  public void keyPressed(KeyEvent event) {
    String key = String.valueOf(event.getKeyChar());
    area1.append(key);
    area2.append(key);
    event.consume();
  }
}

/** An applet that creates two text areas and
 *  attaches the same KeyListener to both.
 */

public class Mirror extends Applet {
  public void init() {
    setLayout(new GridLayout(1, 2));
    TextArea area1 = new TextArea();
    TextArea area2 = new TextArea();
    MirrorListener mirror =
      new MirrorListener(area1, area2);
    area1.addKeyListener(mirror);
    area2.addKeyListener(mirror);
    add(area1);
    add(area2);
  }
}