问题

我目前正在开发一个简单的游戏，并尝试在JavaFX中实现声音，但在创建Media对象时出现了java.lang.reflect.InvocationTargetException错误。
我已经尝试过：

Media media = new Media("file:sounds/test.mp3");

Media media = new Media(new File("file:sound/test.mp3").toURI().toString());

还尝试了两者都使用我的PC上的完整文件路径。

这是我收到的错误：

java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	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.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: Exception in Application start method
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
	at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: java.lang.NoClassDefFoundError: javafx/scene/media/Media
	at application.Main.start(Main.java:14)
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$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$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
	at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$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$3(WinApplication.java:174)
	... 1 more
Caused by: java.lang.ClassNotFoundException: javafx.scene.media.Media
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	... 10 more
Exception running application application.Main```

<details>
<summary>英文:</summary>

I&#39;m currently working on a simple game and I&#39;m trying to implement sound with JavaFX and I get a java.lang.reflect.InvocationTargetException error when creating a Media object.
I have tried:

``` Media media = new Media(&quot;file:sounds/test.mp3&quot;); ```

``` Media media = new Media(new File(&quot;file:sound/test.mp3&quot;).toURI().toString()); ```

and also both with the complete file path on my PC.

This is the error I&#39;m getting:

```Exception in Application start method
java.lang.reflect.InvocationTargetException
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	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.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: Exception in Application start method
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
	at java.base/java.lang.Thread.run(Thread.java:830)
Caused by: java.lang.NoClassDefFoundError: javafx/scene/media/Media
	at application.Main.start(Main.java:14)
	at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$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$10(PlatformImpl.java:428)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:391)
	at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$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$3(WinApplication.java:174)
	... 1 more
Caused by: java.lang.ClassNotFoundException: javafx.scene.media.Media
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	... 10 more
Exception running application application.Main```

</details>


# 答案1
**得分**: 2

错误消息说`NoClassDefFoundError: javafx/scene/media/Media`，这意味着它找不到Media类。

解决方法是向您的项目添加虚拟机参数。

右键单击项目 &gt; 运行 As &gt; 运行配置...

单击“参数”并粘贴以下内容到虚拟机参数中：

--module-path "/path/to/javafx-sdk/lib" --add-modules javafx.media

根据您的项目，您可能还需要添加`javafx.controls`和`javafx.fxml`。

--module-path "/path/to/javafx-sdk/lib" --add-modules javafx.controls,javafx.fxml,javafx.media

将`/path/to/javafx-sdk/lib`替换为您系统中lib文件夹的实际路径。

<details>
<summary>英文:</summary>

The error message says `NoClassDefFoundError: javafx/scene/media/Media` which means that it is not finding the Media classes. 

The solution is to add vm arguments to your project.

Right click project &gt; Run As &gt; Run configurations ...

Click on Arguments and paste the following in vm arguments:

    --module-path &quot;/path/to/javafx-sdk/lib&quot; --add-modules javafx.media

Depending on your project, you may have to add `javafx.controls` and `javafx.fxml` as well.

    --module-path &quot;/path/to/javafx-sdk/lib&quot; --add-modules javafx.controls,javafx.fxml,javafx.media

Replace `/path/to/javafx-sdk/lib` with the actual path of the lib folder in your system.



</details>