title: How can I do an error messages in JavaFX
body: <p>I want to make error message like this on JavaFX. How can I do it?</p>
  
  <p><a href="https://i.stack.imgur.com/M21Dx.png" rel="noreferrer"><img src="https://i.stack.imgur.com/M21Dx.png" alt="half transparent error message above ui"></a></p>