I am trying to play a video with Java. The code I'm using is from this example.
I am using VS Code on Windows 11.
I created a new project from the command pallet using Java: Create Java Project -> JavaFX Provided by Maven for Java.
I used the Maven for Java extension to add the JavaFX Media dependency and then added requires javafx.media; in the module-info.java file.
I was able to get javafx.media module and the associated imports to resolve but get the following error when I run it:
Exception in Application start method
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:119)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1081)
Caused by: java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:1589)
Caused by: java.lang.IllegalAccessError: class com.sun.media.jfxmediaimpl.platform.PlatformManager (in module javafx.media) cannot access class com.sun.javafx.PlatformUtil (in module javafx.base) because module javafx.base does not export com.sun.javafx to module javafx.media
at javafx.media/com.sun.media.jfxmediaimpl.platform.PlatformManager.getSupportedProtocols(PlatformManager.java:203)
at javafx.media/com.sun.media.jfxmediaimpl.NativeMediaManager.loadProtocols(NativeMediaManager.java:197)
at javafx.media/com.sun.media.jfxmediaimpl.NativeMediaManager.canPlayProtocol(NativeMediaManager.java:267)
at javafx.media/com.sun.media.jfxmedia.MediaManager.canPlayProtocol(MediaManager.java:78)
at javafx.media/com.sun.media.jfxmedia.locator.Locator.<init>(Locator.java:239)
at javafx.media/javafx.scene.media.Media.<init>(Media.java:393)
at com.example/com.example.App.start(App.java:20)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
... 1 more
Exception running application com.example.App
module-info.java
module com.example {
requires javafx.controls;
requires javafx.fxml;
requires javafx.media;
opens com.example to javafx.fxml;
exports com.example;
}
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>mediaplayer</artifactId>
<version>1</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.jfxcore</groupId>
<artifactId>javafx-media</artifactId>
<version>18-ea+1</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-controls</artifactId>
<version>13</version>
</dependency>
<dependency>
<groupId>org.openjfx</groupId>
<artifactId>javafx-fxml</artifactId>
<version>13</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<release>11</release>
</configuration>
</plugin>
<plugin>
<groupId>org.openjfx</groupId>
<artifactId>javafx-maven-plugin</artifactId>
<version>0.0.6</version>
<executions>
<execution>
<!-- Default configuration for running -->
<!-- Usage: mvn clean javafx:run -->
<id>default-cli</id>
<configuration>
<mainClass>com.example.App</mainClass>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
App.java
package com.example;
import java.io.File;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.stage.Stage;
/**
* JavaFX App
*/
public class App extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
String path = "C:/Users/Justin/Videos/file_example_MP4_1920_18MG.mp4";
Media media = new Media(new File(path).toURI().toString());
MediaPlayer mediaPlayer = new MediaPlayer(media);
MediaView mediaView = new MediaView(mediaPlayer);
//by setting this property to true, the Video will be played
mediaPlayer.setAutoPlay(true);
//setting group and scene
Group root = new Group();
root.getChildren().add(mediaView);
Scene scene = new Scene(root,500,400);
primaryStage.setScene(scene);
primaryStage.setTitle("Playing video");
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
I saw this answer from a related question but it wasn't helpful because I've already done what is suggested except for adding the options when running it because I am using VS Code to run it rather than running it manually from the command line.
Is there something obvious I'm doing wrong here? What do I need to do to get the video to play?
Your pom.xml has
<groupId>org.jfxcore</groupId>
<artifactId>javafx-media</artifactId>
for the javafx.media dependency. The group id should be org.openjfx:
<groupId>org.openjfx</groupId>
<artifactId>javafx-media</artifactId>
Also make sure all JavaFX dependencies use the same version.