How to display a temporary baloon tooltip during input validation?

Question

I\'m somewhat used to the GUI idiom where when I type something wrong in a text input field a balloon pops up from the field with info about what I got wrong / expected input. I

Answer 1

Balloon Tip is a library that does that:

balloonTip = new BalloonTip(f, "Tooltip msg");

That was all needed! If you insist on a having it be a tooltip too:

tooltipBalloon = new BalloonTip(someComponent, "I'm a balloon tooltip!");
// Now convert this balloon tip to a tooltip, such that the tooltip shows up after 500 milliseconds and stays visible for 3000 milliseconds
ToolTipUtils.balloonToToolTip(tooltipBalloon, 500, 3000);