title: How to make a javafx button with circle shape of 3xp diameter?
body: <p>I want to make a VERY small round button with no text on it. Here is how I tried. </p>
  
  <pre><code>Button bt = new Button();
  bt.setShape(new Circle(1.5));
  bt.setMaxSize(3,3);
  </code></pre>
  
  <p><br/> However,there are two problems:<br/>
  1.The shape of the button is not perfectly round, but more like an oval. <br/>
  2. The <code>bt.setMaxSize(1.5,1.5);</code> does not take effect. As i reckon, its diameter is more than 3... 
  <br/>How could I make a smaller rounder Button? Help Appreciated.</p>