JavaFX Playing，InvocationTargetException
JavaFX Playing，InvocationTargetException
提问于 2016-01-22 09:12:25
我正在尝试播放mp3文件并得到一个异常。这是我的代码和堆栈跟踪。我的声音在我的工作空间里。
public class Main extends Application {
//my code
@Override
public void start(Stage primaryStage) {
URL resource = getClass().getResource("/Alistirma/src/IkinciAlistirma/hated.mp3"); //its in my workspace
AudioClip clip = new AudioClip(resource.toString()); //line 21
final Button button = new Button("Play"); //simple button just for playing clip
button.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
// TODO Auto-generated method stub
clip.play();
}
});
//after here nothing important for my problem.
//basic FX stuff
}
public static void main(String[] args) {
launch(args);
}
}这只是播放mp3的简单代码，但是我得到了一个例外，下面是堆栈跟踪
Exception in Application start method
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:497)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
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:497)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at IkinciAlistirma.Main.start(Main.java:21)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)
... 1 more
Exception running application IkinciAlistirma.Main回答 1
Stack Overflow用户
回答已采纳
发布于 2016-01-22 10:19:47
问题在于：
URL resource = URL resource = getClass().getResource("/Alistirma/src/IkinciAlistirma/hated.mp3"); 首先:使用mp3方法无法从工作区访问您的getResource(String path)文件。根据您的环境和IDE，它将在项目中不同的位置为"Alistirma/src/IkinciAlistirma/hated.mp3“提供sarch。通过打印getResource(String path)给出的URL，您可以找到getResource(".")正在搜索资源的起始点文件夹，然后扣除要放置文件的位置。如果您想将文件保存在它所在的位置，仍然可以使用File类访问它。
第二:为什么是URL resource = URL resource =？我想复制/粘贴失败了;)？
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原文链接：
https://stackoverflow.com/questions/34942887
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