title: How implement javafx label value change listener
body: <p>how call the listener when Label text changed</p>
  
  <pre><code> Label myLabel= new Label("text1");
  </code></pre>
  
  <p>if i change the text</p>
  
  <pre><code>myLabel.settext("text2");
  </code></pre>
  
  <p>There is any listener so that i can perform this</p>
  
  <pre><code>myLabel.LISTENER{
  System.out.println("Label Text Changed");
  }
  </code></pre>