title: How to repaint a window (stage) in JAVA FX 2.2
body: <p>I need to repaint a window on selection of a combobox element.
  How to repaint a window (stage) in JAVA FX 2.2?</p>
  
  <p>Below is my code</p>
  
  <pre><code>functionComboBox.valueProperty().addListener(new ChangeListener&lt;String&gt;() {
      @Override public void changed(ObservableValue ov, String t, String t1) 
      {
          showFunctionParamters(t1);
      }
      private void showFunctionParamters(String methodName) 
      {
          gridPaneParameters = new GridPane();
          gridPaneParameters.setPadding(new Insets(20, 0, 0, 50));
          gridPaneParameters.setHgap(10);
          gridPaneParameters.setVgap(4);
          int i = 2; 
          parameterList = methodAttrMap.get(methodName);
          Iterator&lt;String&gt; itrParameterList = parameterList.iterator();
          while(itrParameterList.hasNext())
          {
              //TODO allow the user to enter the values for the parameters 
              Label parameterName = new Label(itrParameterList.next()); 
              TextField parameterTextField = new TextField();
              gridPaneParameters.add(parameterName, 1, i);
              gridPaneParameters.add(parameterTextField, 2, i);
              i++;
          }
          pane.getChildren().add(gridPaneParameters);
      }
  });
  </code></pre>