Re: subclass JPasswordField

It would help if you also posted a short driver for your programs, so
that we could see that you were implementing them correctly, or at how
you were trying to implement them.

For example:

public class PasswordTest {

     public static void main(String[] args)
     {
         // Test harness
         javax.swing.SwingUtilities.invokeLater( new Runnable() {

             public void run()
             {
                 createAndShowGui();
             }
         } );
     }

     private static void createAndShowGui()
     {
         // Test harness
         JFrame jf = new JFrame( "Test Password" );
         JPasswordField jpwd = new JPasswordField();
         TimedPasswordListener tpl = new TimedPasswordListener();
         jpwd.getDocument().addDocumentListener( tpl );
         jf.add( jpwd );
         jf.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
         jf.setLocationRelativeTo( null );
         jf.pack();
         jf.setVisible( true );
     }
}

This can be easily added to your existing class just by giving it a
"main" method.

Onward, however...

Mike wrote:


Yes. If only there were some way of storing references to other classes
in your class, it would be easy.

class TimedPasswordListener implements DocumentListener, ActionListener {
    Timer timer;
    char echoChar;
         JPasswordField passwordField;

.....
    public void showText(DocumentEvent e, int timeOut) {
        Document doc = (Document) e.getDocument();
        // How do I set the echo char of the JPasswordField
        // to '0' here, and how do I restore it again after
                 passwordField.setEchoChar( (char) 0 );
        // timeOut seconds?

.....

Hmmm.