@FXML
private void handleOpenFile() {
// Create a file chooser dialog and set the initial directory
FileChooser fileChooser = new FileChooser();
fileChooser.setInitialDirectory(new File(System.getProperty("user.home")));
// Filter for media files
FileChooser.ExtensionFilter filter = new FileChooser.ExtensionFilter(
"Media Files (*.mp4, *.mp3, *.wav, *.jpg, *.png)", "*.mp4", "*.mp3", "*.wav", "*.jpg", "*.png");
fileChooser.getExtensionFilters().add(filter);
// Show the file chooser dialog and get the selected file
Stage stage = (Stage) mediaView.getScene().getWindow();
File file = fileChooser.showOpenDialog(stage);
if (file != null) {
// Check if the selected file is a media file or an image
String filename = file.getName();
String extension = filename.substring(filename.lastIndexOf(".") + 1).toLowerCase();
if (extension.equals("jpg") || extension.equals("png")) {
// Display the selected image in the image view
imageView.setImage(new Image(file.toURI().toString()));
} else {
// Create a media player and set it to the media view
Media media = new Media(file.toURI().toString());
mediaPlayer = new MediaPlayer(media);
mediaView.setMediaPlayer(mediaPlayer);
// Bind the time slider to the media player's current time
mediaPlayer.currentTimeProperty().addListener((observable, oldValue, newValue) -> {
timeSlider.setValue(newValue.toSeconds());
});
mediaPlayer.setOnReady(() -> {
timeSlider.setMax(mediaPlayer.getMedia().getDuration().toSeconds());
openButton.setDisable(true);
openButton.setVisible(false);
playButton.setVisible(true);
playButton.setDisable(false);
timeSlider.setVisible(true);
timeSlider.setDisable(false);
});
}
}
}
The method displayed above is supposed to give the user the option to choose a file and handle it based on the format. I have the method binded to a button in the UI and at every press it throws the same InvocationTargetException. This is the extended error message:
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml@19.0.2.1/javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1857)
at javafx.fxml@19.0.2.1/javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1724)
at javafx.base@19.0.2.1/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at javafx.base@19.0.2.1/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at javafx.base@19.0.2.1/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base@19.0.2.1/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base@19.0.2.1/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.base@19.0.2.1/javafx.event.Event.fireEvent(Event.java:198)
at javafx.graphics@19.0.2.1/javafx.scene.Node.fireEvent(Node.java:8923)
at javafx.controls@19.0.2.1/javafx.scene.control.Button.fire(Button.java:203)
at javafx.controls@19.0.2.1/com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:207)
at javafx.controls@19.0.2.1/com.sun.javafx.scene.control.inputmap.InputMap.handle(InputMap.java:274)
at javafx.base@19.0.2.1/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:247)
at javafx.base@19.0.2.1/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at javafx.base@19.0.2.1/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at javafx.base@19.0.2.1/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base@19.0.2.1/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base@19.0.2.1/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at javafx.base@19.0.2.1/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.base@19.0.2.1/javafx.event.Event.fireEvent(Event.java:198)
at javafx.graphics@19.0.2.1/javafx.scene.Scene$MouseHandler.process(Scene.java:3894)
at javafx.graphics@19.0.2.1/javafx.scene.Scene.processMouseEvent(Scene.java:1887)
at javafx.graphics@19.0.2.1/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2620)
at javafx.graphics@19.0.2.1/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:411)
at javafx.graphics@19.0.2.1/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:301)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at javafx.graphics@19.0.2.1/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:450)
at javafx.graphics@19.0.2.1/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:424)
at javafx.graphics@19.0.2.1/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:449)
at javafx.graphics@19.0.2.1/com.sun.glass.ui.View.handleMouseEvent(View.java:551)
at javafx.graphics@19.0.2.1/com.sun.glass.ui.View.notifyMouse(View.java:937)
at javafx.graphics@19.0.2.1/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics@19.0.2.1/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:184)
at java.base/java.lang.Thread.run(Thread.java:1589)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:116)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javafx.reflect.Trampoline.invoke(MethodUtil.java:77)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at javafx.base@19.0.2.1/com.sun.javafx.reflect.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml@19.0.2.1/com.sun.javafx.fxml.MethodHelper.invoke(MethodHelper.java:84)
Caused by: java.lang.reflect.InvocationTargetException
at javafx.fxml@19.0.2.1/javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1854)
.. 46 more
Caused by: java.lang.NullPointerException: Cannot invoke "javafx.scene.media.MediaView.getScene()" because "this.mediaView" is null
Caused by: java.lang.NullPointerException: Cannot invoke "javafx.scene.media.MediaView.getScene()" because "this.mediaView" is null
at client.scenes.MediaPlayerCtrl.handleOpenFile(MediaPlayerCtrl.java:71)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
.. 53 more
I can't figure out what is causing the issue on my own as I'm still learning the ropes of JavaFX. Could you guys help?
