How to use

addAncestorListener

method

in

javax.swing.JPasswordField

/**
 * Shows a dialog requesting input from the user parented to {@code parentComponent} with the dialog having the title {@code title} and message type {@code messageType}.
 *
 * @param parentComponent the parent {@code Component} for the dialog
 * @param message         the {@code Object} to display
 * @param title           the {@code String} to display in the dialog
 *                        title bar
 * @param messageType     the type of message that is to be displayed:
 *                        {@code ERROR_MESSAGE},
 *                        {@code INFORMATION_MESSAGE},
 *                        {@code WARNING_MESSAGE},
 *                        {@code QUESTION_MESSAGE},
 *                        or {@code PLAIN_MESSAGE}
 * @return An {@link Optional} holding the password if the dialog was confirmed, otherwise {@link Optional#empty()}.
 * @throws HeadlessException if {@code GraphicsEnvironment.isHeadless} returns {@code true}
 * @see java.awt.GraphicsEnvironment#isHeadless
 */
public static Optional<char[]> showPasswordDialog(@Nullable final Component parentComponent, final Object message, final String title, final int messageType) {
  final JPasswordField jPasswordField = new JPasswordField();
  jPasswordField.addAncestorListener(FocusRequestingAncestorListener.INSTANCE);
  return OK_OPTION == showConfirmDialog(parentComponent, new Object[]{message, jPasswordField}, title, OK_CANCEL_OPTION, messageType)
      ? Optional.of(jPasswordField.getPassword())
      : Optional.empty();
}

if (isPassword) {
 JPasswordField pwd = new JPasswordField();
 pwd.addAncestorListener(new RequestFocusListener());
 int action = JOptionPane.showConfirmDialog(null, pwd, label, JOptionPane.OK_CANCEL_OPTION);
 if (action == JOptionPane.OK_OPTION) {

if (isPassword) {
 JPasswordField pwd = new JPasswordField();
 pwd.addAncestorListener(new RequestFocusListener());
 int action = JOptionPane.showConfirmDialog(null, pwd, label, JOptionPane.OK_CANCEL_OPTION);
 if (action == JOptionPane.OK_OPTION) {

passwordField.addAncestorListener(new RequestFocusListener());
JOptionPane.showConfirmDialog(null, new Object[]{label, passwordField}, Res.getString("title.password.required"), JOptionPane.OK_CANCEL_OPTION);
password = new String(passwordField.getPassword());