title: How to open a PDF file javafx
body: <p>I want to open a pdf file and display it on new window when a button is clicked 
  i try this an it is not working:</p>
  
  <pre><code>Button btn = new Button();
  
  File file=new File("Desktop/Test.pdf");
  btn.setText("Open");
  
  btn.setOnAction(new EventHandler&lt;ActionEvent&gt;() {
  
      public void handle(ActionEvent event) {
  
          try {
              desktop.open(file);
          } catch (IOException ex) {
              Logger.getLogger(Exemple.class.getName())
                  .log(Level.SEVERE, null, ex);
          }
      }
  });
  </code></pre>