title: How to set transparent background of JDialog
body: <p>Hy,..</p>
  
  <p><p><b>
  how can i set the background transparent and "remove" the closeoperation (marked red) ?
  I only want to show the card :-) </p></b></p>
  
  <p><img src="https://i.stack.imgur.com/J4rKt.png" alt="alt text"></p>
  
  <p>Thanks..!</p>