MaskFormatter mask = getMaskFormatter("##:##");
mask.setValueContainsLiteralCharacters(false);
mask.setPlaceholderCharacter('_');
OptionPaneOutputCommand command = new OptionPaneOutputCommand();
command.setMessage("Hora inv�lida!");
TimeVerifier verifier = new TimeVerifier();
verifier.setOutput(command);
JFormattedTextField field = new JFormattedTextField(mask);
field.setInputVerifier(verifier);
return field;
}