logo
down
shadow

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 :
@Override
public void initialize(URL location, ResourceBundle resources) {
    playView.setImage(new Image(getClass().getResource("Pause.png").toExternalForm()));
    playView.setVisible(false);
    playView.setOnMouseClicked(event -> onPlayView());
    Platform.runLater(this::onStartup);
}


Share : facebook icon twitter icon
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");
chooser.setInitialDirectory(defaultDirectory);
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 :
while((st=br.readLine())!=null);
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();
            fileChooser.showOpenDialog(stage); 
       }
   });
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") ;
loader.load();
EmailSenderController controller = (EmailSenderController)  loader .getController() ;
controller.setFileReadService(frs) ; // frs created elsewhere
Related Posts Related Posts :
  • Passing HttpServletResponse in Spring Boot controller method
  • Failed to load libraries: [netty_tcnative_linux_arm_32, netty_tcnative_linux_arm_32_fedora, netty_tcnative_arm_32, netty
  • How to build a small documents storage?
  • Getting pixel position of a text in an image
  • How do I get a list of Methods called from a Class in Eclipse IDE?
  • Convert string to day of week (not exact date)
  • Unable to understand how rounding is working for decimal digits (Java)
  • How to avoid java.lang.NoSuchMethodError: org.apache.poi.util.IOUtils.copy(Ljava/io/InputStream;Ljava/io/OutputStream;)
  • JTable Renderer not working with RowSorter?
  • From java.util.concurrent.Future<T> to play.libs.F.Promise<T>: How to do that in Java?
  • jUnit tests work in Eclipse, but fail in ant - java.lang.RuntimeException: Stub
  • How do i add a tooltip to existing gwt Textbox?
  • actor replying to non-actor
  • Google Cloud Messaging - server connection
  • Which classes are unmodifiable and cannot be intrumented and is there a way to bypass it?
  • Java & Jersey 1.17: Custom default response headers
  • Java rounding error
  • Setting custom RejectedExecutionHandler for ThreadPoolExecutor after executing some tasks?
  • Arquillian test class variables lose value
  • java.util.ConcurrentModificationException while inserting in ArrayList
  • How to write generic Java API without method Overloading
  • Java Serialization / Deserialization of an ArrayList works only on first program execution
  • Conway's Game of Life's rules dont apply properly
  • call a java method when Click on a html button without using javascript
  • Why does SSLSocketFactory.createSocket returns a Socket instead of SSLSocket?
  • How to schedule a task in Tomcat
  • compare two pdf files (approach) using java
  • What is the use of allowCoreThreadTimeout( ) in ThreadPoolExecutor?
  • Describe the Strategy Design Pattern in Java?
  • MongoDB too many open connections
  • Issue with generate JAXB classes with value constructors
  • Moving from one frame to another in java swing
  • Get a thread by Id
  • how to open front camera and back camera at same time?
  • Messed up with Java Declaration
  • Extracting chart in EXcel as image using java
  • How to get latitude and longitude in Android phone?
  • Do GC pauses and kill -STOP produce the same behavior?
  • Android HTML.ImageGetter Images resized
  • The way to instantiate map<String, List<String>> in Java
  • Java Making objects move while buttons held
  • Androidx Navigation View - `setNavigationItemSelectedListener` Doesn't Work
  • after compiling code JFrame does not appear
  • Netbeans project, JFrames ran from the main JFrame close all JFrames in project
  • Square Retrofit Client: How to enable/disable followRedirects? How to intercept redirect URL?
  • Java Circular Reference - Can’t Compile
  • Mouse click on specific time JAVA
  • android 4 onCreateDialog return type incompatible when overriding
  • Java Implementation of Oracle's DBMS_UTILITY.GET_HASH_VALUE Function
  • javac cannot be run, and furthermore does not seem installed
  • Function to obtain a thread given its ID
  • Java File path to Executable has spaces
  • Minimum Oracle Java VM heap memory setting?
  • Elegant way to create one of a large number of classes
  • Java fx binding styles
  • Summing weights based on string in large file
  • Android ListView setOnItemClickListener not working
  • How is the Java Bootstrap Classloader loaded?
  • Check object is blank
  • Add image between text in JEditorPane
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org