如何用JavaFX播放声音

Question

我刚刚开始使用JavaFX。我知道它的基本原理。我尝试使用media和mediaplayer类播放一个声音，叫做“sound.mp3”。我正在eclipse中编程，我在src文件夹中有声音文件，与“（默认包）”相同的文件夹。下面是我的代码：

import javafx.scene.media.*;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

public class Main extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Hello World!");

        String ssound = "sound.mp3";
        Media sound = new Media(ssound);
        MediaPlayer mediaPlayer = new MediaPlayer(sound);
        mediaPlayer.play();

        StackPane root = new StackPane();
        primaryStage.setScene(new Scene(root, 800, 450));
        primaryStage.show();
    }
}

请告诉我我做错了什么。

下面是来自控制台的错误消息：

Exception in Application start method
Exception in thread "main" java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(Unknown Source)
    at com.sun.javafx.application.LauncherImpl.access$000(Unknown Source)
    at com.sun.javafx.application.LauncherImpl$1.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:724) Caused by: java.lang.IllegalArgumentException: uri.getScheme() == null!
    at com.sun.media.jfxmedia.locator.Locator.<init>(Unknown Source)
    at javafx.scene.media.Media.<init>(Unknown Source)
    at Main.start(Main.java:16)
    at com.sun.javafx.application.LauncherImpl$5.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl$5.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl$4$1.run(Unknown Source)
    at com.sun.javafx.application.PlatformImpl$4$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl$4.run(Unknown Source)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.access$100(Unknown Source)
    at com.sun.glass.ui.win.WinApplication$3$1.run(Unknown Source) ... 1 more

Answer 1

只是其他答案的有效汇编：

String musicFile = "StayTheNight.mp3";     // For example

Media sound = new Media(new File(musicFile).toURI().toString());
MediaPlayer mediaPlayer = new MediaPlayer(sound);
mediaPlayer.play();

将音乐文件添加到项目文件夹中，与bin和src一起。

任何IDE也会提示您添加以下内容：

import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import java.io.File;

就像一种魅力。