Code snippets from ToasterLauncher - GWTP Beginner's Tutorial Part 1

LauncherPresenter.java

private boolean validateFields(String coordinates, String power) {
    return coordinates.matches("[0-9]{3};[0-9]{3};[0-9]{3}") && power.matches("[0-9]");
}

@Override
public void onLaunch(String coordinates, String power) {
    if (validateFields(coordinates, power)) {
        // TODO: Do something with the values. Process with service.
    }
}