Recently I was programming a software with JavaFx2.0,but I met with a big problem,that is - How can I access a Controller class? For every controller class with the same class type,they may act different because of the model it depends on,so I want to get the view's Controller class and provide it with the specified model,can I do this? I have tried to get the controller by the FXMLLoader,but the method getController() returns null!why?
1.LightView.java
FXMLLoader loader = new FXMLLoader();
anchorPane = loader.load(LightView.class.getResource(fxmlFile));//fxmlFile = "LightView.fxml"
//controller = (LightViewController) loader.getController();//fail to get controller!it is null
//I want to -> controller.setLight(light);
2.LightView.fxml
<AnchorPane ... fx:controller="light.LightViewController" >
3.LightViewController.java
....
private Light light;
public void initialize(URL arg0, ResourceBundle arg1)
4.Light.java
.... a simple pojo
so,what I want to do is provide every LightViewController with a specified Light Object(they are from a List). Can anyone helps me?Thanks a lot!
I use the following :
URL location = getClass().getResource("MyController.fxml");
FXMLLoader fxmlLoader = new FXMLLoader();
fxmlLoader.setLocation(location);
fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());
Parent root = (Parent) fxmlLoader.load(location.openStream());
In this way fxmlLoader.getController()
is not null
In addition to Alf's answer, I want to note, that the code can be shorter:
URL location = getClass().getResource("MyController.fxml");
FXMLLoader fxmlLoader = new FXMLLoader();
Parent root = (Parent) fxmlLoader.load(location.openStream());
This works as well.
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