// Robert Bradshaw 11/98

import java.awt.*;
import java.awt.event.*;

public class SingleCharListener extends KeyAdapter {
  public void keyTyped(KeyEvent e) {
    if (e.isActionKey() ||
        e.getKeyCode()==KeyEvent.VK_ENTER || 
        e.getKeyCode()==KeyEvent.VK_TAB ||
        e.getKeyCode()==KeyEvent.VK_BACK_SPACE);
    else {
      if (e.getSource() instanceof TextComponent) {
        ((TextComponent)e.getSource()).setText("");
      }
    }
    //System.out.println(" char pressed "+e + "   " + e.isConsumed());
  }
}