FileChooser in JavaFX giving NullPointerException

FileChooser in JavaFX giving NullPointerException

By : sethzgold
Date : November 19 2020, 03:59 PM
may help you . It is too soon to open the file dialog in the initialize method of a JavaFX controller. When this method is called, the FXML node tree is still in loading + initialization phase, so it has not been attached to the Scene yet.
So getScene() returns null.
code :
public void initialize(URL location, ResourceBundle resources) {
    playView.setImage(new Image(getClass().getResource("Pause.png").toExternalForm()));
    playView.setOnMouseClicked(event -> onPlayView());

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JavaFX FileChooser

JavaFX FileChooser

By : Dean Guo
Date : March 29 2020, 07:55 AM
I hope this helps . A DirectoryChooser was added to JavaFX as part of the 2.1 release. Usage is:
code :
DirectoryChooser chooser = new DirectoryChooser();
chooser.setTitle("JavaFX Projects");
File defaultDirectory = new File("c:/dev/javafx");
File selectedDirectory = chooser.showDialog(primaryStage);
NullPointerException with a Filechooser?

NullPointerException with a Filechooser?

By : Maria Angelica Catay
Date : March 29 2020, 07:55 AM
To fix this issue It is a very simple error. You have placed a semicolon after your while loop.
code :
android - nullpointerexception when back from filechooser

android - nullpointerexception when back from filechooser

By : Eszter Köntös
Date : March 29 2020, 07:55 AM
it helps some times problem solved. I took the advice from Danita over here, and it worked!!
JavaFX - Why is my FileChooser giving me access to the origin Stage?

JavaFX - Why is my FileChooser giving me access to the origin Stage?

By : Eoin Farrell
Date : March 29 2020, 07:55 AM
To fix the issue you can do According to the JavaDocs
code :
    button.setOnAction(new EventHandler<ActionEvent>() {
        @Override public void handle(ActionEvent e) {
            FileChooser fileChooser = new FileChooser();
JavaFX FileChooser throws NullPointerException when called

JavaFX FileChooser throws NullPointerException when called

By : user7884818
Date : March 29 2020, 07:55 AM
Any of those help The problem is the controller that executes the addHtml method and the one you initially create is not the same. When you load the EmailSender, the FXMLLoader uses the empty constructor to create a new controller. Hence the constructor which sets the attributes is not called and you end up with null attributes.
To get the correct controller, use the loader's getController method and set the attributes with appropriate set methods:
code :
FXMLLoader loader = new FXMLLoader("fxml file") ;
EmailSenderController controller = (EmailSenderController)  loader .getController() ;
controller.setFileReadService(frs) ; // frs created elsewhere
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