This week's book giveaways are in the iOS and Features new in Java 8 forums. We're giving away four copies each of Barcodes with iOS: Bringing together the digital and physical worlds and Core Java for the Impatient and have the authors on-line! See this thread and this one for details.
There's no code that calls "validateUser()", and there's no code that displays another page; there's just code that shows a GUI, but that GUI doesn't do anything. Were you assuming that something, somehow, automatically, would call "validateUser()"?