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我正在尝试在Java上播放mp3音频,其中一种形式.我相信是JavaFX,一切顺​​利,直到我尝试播放音频.

这是代码:

import javax.sound.sampled.AudioPermission;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.stage.Stage;


public class fx_main extends Application {

    @Override
    public void start(Stage primaryStage) {
        Button btn = new Button();
        btn.setText("Say 'Hello World'");
        btn.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent event) {
                System.out.println("Hello World!");


                Media m = new Media("/04.mp3");
                MediaPlayer mp = new MediaPlayer(m);

                mp.play();

            }
        });

        StackPane root = new StackPane();
        root.getChildren().add(btn);

         Scene scene = new Scene(root, 300, 250);

        primaryStage.setTitle("Hello …