//This is all we do to validate the URL:
group.add(f, Validators.REQUIRE_NON_EMPTY_STRING,
Validators.NO_WHITESPACE,
Validators.URL_MUST_BE_VALID);
panel.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
//Convenience method to show a simple dialog
if (panel.showOkCancelDialog("URL")) {
System.out.println("User clicked OK. URL is " + f.getText());
System.exit(0);
} else {