JavaFX Media Exception。无法创建播放器

时间：2018-03-10 08:10:33

标签： java javafx netbeans-8.1

我一直在尝试使用JavaFX在Java中创建一个简单的GUI播放器。它工作正常，直到我尝试打开文件。它只是抛出一堆而什么都不做。

STACK 

Executing /home/julius/Templates/Java-Projects/JavaFXApplication1/dist/run1593625829/JavaFXApplication1.jar using platform /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
Prism-ES2 Error : GL_VERSION (major.minor) = 1.4

(java:4134): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",

(java:4134): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",

FilePath is- file：///home/julius/Videos/MOVIES/SAW/sAw/Saw.mp4 

Exception in thread "JavaFX Application Thread"  java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1774)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8413)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication.lambda$null$5(GtkApplication.java:139)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
... 48 more
Caused by: MediaException: UNKNOWN : com.sun.media.jfxmedia.MediaException: Could not create player! : com.sun.media.jfxmedia.MediaException: Could not create player!
at javafx.scene.media.MediaException.exceptionToMediaException(MediaException.java:146)
at javafx.scene.media.MediaPlayer.init(MediaPlayer.java:511)
at javafx.scene.media.MediaPlayer.<init>(MediaPlayer.java:414)
at javafxapplication1.FXMLDocumentController.handleButtonAction(FXMLDocumentController.java:47)
... 58 more
Caused by: com.sun.media.jfxmedia.MediaException: Could not create player!
at com.sun.media.jfxmediaimpl.NativeMediaManager.getPlayer(NativeMediaManager.java:274)
at com.sun.media.jfxmedia.MediaManager.getPlayer(MediaManager.java:118)
at javafx.scene.media.MediaPlayer.init(MediaPlayer.java:467)
... 60 more
Deleting directory /home/julius/Templates/Java-Projects/JavaFXApplication1/dist/run1593625829
jfxsa-run:
BUILD SUCCESSFUL (total time: 58 seconds)

[EDIT-1] 

package javafxapplication1;


import java.io.File;
import java.net.
import java.util.ResourceBundle;
import javafx.application.Platform;
import javafx.beans.binding.Bindings;
import javafx.beans.property.DoubleProperty;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.scene.media.MediaView;
import javafx.stage.FileChooser;

public class FXMLDocumentController implements Initializable {
private String filePath;

@FXML
private MediaPlayer mp;
@FXML
private MediaView mv;
@Override
public void initialize(URL arg0, ResourceBundle arg1) {}

@FXML
public void handleButtonAction(ActionEvent event) {
    FileChooser fc= new FileChooser();
    FileChooser.ExtensionFilter extensionFilter= new FileChooser.ExtensionFilter("Video files with mp4 extension only.", "*.mp4");
    fc.getExtensionFilters().add(extensionFilter);

    File file= fc.showOpenDialog(null);
    filePath= file.toURI().toString();

    if(filePath!= null) {
                System.out.println("FilePath is- "+filePath);
        Media media= new Media(filePath);
        mp= new MediaPlayer(media);
        mv.setMediaPlayer(mp);
        DoubleProperty width= mv.fitWidthProperty();
        DoubleProperty height= mv.fitHeightProperty();
        width.bind(Bindings.selectDouble(mv.sceneProperty(), "width"));
        height.bind(Bindings.selectDouble(mv.sceneProperty(), "height"));
        mp.play();
    }
}

@FXML public void playButton(ActionEvent event) {mp.play(); mp.setRate(1);}
@FXML public void pauseButton(ActionEvent event) {mp.pause();}
@FXML public void stopButton(ActionEvent event) {mp.stop();}
@FXML public void forwardButton(ActionEvent event) {}
@FXML public void rewindButton(ActionEvent event) {}
@FXML public void fasterButton(ActionEvent event) {mp.setRate(2);}
@FXML public void slowerButton(ActionEvent event) {mp.setRate(0.5);}
@FXML public void exitButton(ActionEvent event) {Platform.exit();}
}

路径似乎没问题，我无法确定我的控制器来源有什么问题让我知道是否有人想看到来源。我如何解决这个未知例外？

  

要牢记的几件事

     
      

  • Java版本

         

    openjdk version“1.8.0_151”

         

    OpenJDK运行时环境（版本1.8.0_151-8u151-b12-0ubuntu0.17.10.2-b12）

         

    OpenJDK 64位服务器VM（版本25.151-b12，混合模式）

    •   

  • 我正在使用安装了所有javafx插件的Netbeans IDE。

    •   

1 个答案:

答案 0 :(得分：0)

通过安装 Java 9.0.4 和 Intellij IDE 对此进行排序。 Netbeans 8.2与java 9不兼容。代码没问题。

更新代码

控制器源已更新，使其与java9兼容。出于某种原因 java.nio.file.Paths; 不能使用最新的java。

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