title: How to make a window look like this in Java?
body: <p>How do I create a window which looks like this in Java:</p>
  
  <p><img src="https://i.stack.imgur.com/DYpkr.png" alt="frame"></p>
  
  <p>I want that window layout, instead of the standard Windows-borders, and I don't know how this is called.</p>
  
  <p>Edit: look and feel doesn't work for me:</p>
  
  <p><img src="https://i.stack.imgur.com/XSrrF.png" alt="not working for me"></p>