title: javafx image remove from imageview
body: <p>I have a grid-pane containing many ImageView nodes. When clicking on an ImageView, I want to remove the image.</p>
  
  <pre><code> ImageView image = new ImageView("https://www.google.co.in/images/nav_logo242.png");
  </code></pre>
  
  <p>On an action, I did:</p>
  
  <pre><code> image.setImage(null);
   System.gc();
  </code></pre>
  
  <p>But, I still see the older image. </p>
  
  <pre><code> image.getImage(); // it returns null
  </code></pre>