如何正确使用 JavaFX MediaPlayer? [英] How to use JavaFX MediaPlayer correctly?

问题描述

我正在编写一个简单的游戏并尝试播放声音，但是当我创建它抛出 IllegalArgumentException 的 Media 对象时，我无法让它工作.我不是一个 Java 编码员，任何帮助将不胜感激.这是一个示例代码:

import javafx.scene.media.Media;导入 javafx.scene.media.MediaPlayer;公共课主要{公共静态无效主(字符串 [] args){媒体选择 = new Media("put.mp3");//这里抛出MediaPlayer player = new MediaPlayer(pick);播放器播放()；}}

显然put.mp3"存在并且位于正确的目录中，我使用以下方法检查了路径:System.out.println(System.getProperty("user.dir"));

我在这里做错了什么?

解决方案

问题是因为您试图在 JavaFX 应用程序线程 之外运行 JavaFX 场景图控件.

在 JavaFX 应用程序线程内运行所有 JavaFX 场景图节点.

您可以通过扩展 JavaFX Application 类并覆盖 start() 方法来启动 JavaFX 线程.

public class Main extends Application {@覆盖公共无效开始(阶段primaryStage){媒体选择 = new Media("put.mp3");//用你自己的音频文件替换它MediaPlayer player = new MediaPlayer(pick);//添加一个mediaView，用于显示媒体.这是有必要的 ！//这个mediaView被添加到一个PaneMediaView mediaView = new MediaView(player);//添加到场景Group root = new Group(mediaView);场景场景 = 新场景(root, 500, 200);//显示舞台primaryStage.setTitle("媒体播放器");primaryStage.setScene(场景)；primaryStage.show();//舞台显示后播放媒体播放器播放()；}公共静态无效主(字符串 [] args){发射(参数)；}}

I'm writing a simple game and trying to play sounds but I can't get it to work when I create the Media object it throws IllegalArgumentException. I'm not much of a Java coder and any help will be appreciated. Here is a sample code:

import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;

public class Main{
    public static void main(String[] args) {

        Media pick = new Media("put.mp3"); //throws here
        MediaPlayer player = new MediaPlayer(pick);
        player.play();
    }
}

Obviously "put.mp3" exists and located in the correct directory, I checked the path using: System.out.println(System.getProperty("user.dir"));

what am I doing wrong here?

解决方案

The problem is because you are trying to run JavaFX scene graph control outside of JavaFX Application thread.

Run all JavaFX scene graph nodes inside the JavaFX application thread.

You can start a JavaFX thread by extending JavaFX Application class and overriding the start() method.

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) {

        Media pick = new Media("put.mp3"); // replace this with your own audio file
        MediaPlayer player = new MediaPlayer(pick);

        // Add a mediaView, to display the media. Its necessary !
        // This mediaView is added to a Pane
        MediaView mediaView = new MediaView(player);

        // Add to scene
        Group root = new Group(mediaView);
        Scene scene = new Scene(root, 500, 200);

        // Show the stage
        primaryStage.setTitle("Media Player");
        primaryStage.setScene(scene);
        primaryStage.show();

        // Play the media once the stage is shown
        player.play();
    }

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

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