Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
2.4k views
in Technique[技术] by (71.8m points)

java - AudioPlayer is internal proprietary API and may be removed in a future release

import javax.swing.*;
import sun.audio.*;
import java.awt.event.*;
import java.io.*;

public class Sound {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setSize(200,200);
        JButton button = new JButton("Clcik me");
        frame.add(button);
        button.addActionListener(new AL());
        frame.show(true);
    }
    public static class AL implements ActionListener{
        public final void actionPerformed(ActionEvent e){
            music();
        }
    }
    public static void music(){
        AudioPlayer MGP = AudioPlayer.player;
        AudioStream BGM;
        AudioData MD;
        ContinuousAudioDataStream loop = null;
        try{
            BGM = new AudioStream(new FileInputStream("backgroundmusic.wav"));
            MD = BGM.getData();
            loop = new ContinuousAudioDataStream(MD);
        }catch(IOException error){
            error.printStackTrace();
        }
        MGP.start(loop);
    }
}

When I run this code, I see following warnings. Why and how do I avoid that?

Sound.java:22: warning: AudioPlayer is internal proprietary API and may be removed in a future release
Sound.java:23: warning: AudioStream is internal proprietary API and may be removed in a future release
Sound.java:24: warning: AudioData is internal proprietary API and may be removedin a future release
Sound.java:25: warning: ContinuousAudioDataStream is internal proprietary API and may be removed in a future release
Sound.java:27: warning: AudioStream is internal proprietary API and may be removed in a future release
Sound.java:29: warning: ContinuousAudioDataStream is internal proprietary API and may be removed in a future release

Note: Sound.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.

7 warnings
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

First, you should be using the classes in the javax.sound.sampled package to avoid the compiler warnings. Second, when using these classes, you'll also need to drive them from a thread in the background.

Here's one a wrote awhile ago. There are better ways to do it now than to sleep in a loop, but it works for quick and easy wav files, and you can adapt the code if you need to. A clever implementation might even be able to drive several audio files from the same thread.

Plays an audio file:

import java.io.InputStream;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;

public class SoundThread extends Thread {

    private final String resource;

    public static void play(String resource) {
        Thread t = new SoundThread(resource);
        t.setDaemon(true);
        t.start();
    }

    public SoundThread(String resource) {
        this.resource = resource;
    }

    @Override
    public void run() {
        Clip clip = null;
        try {
            InputStream in = SoundThread.class.getClassLoader().getResourceAsStream(resource);
            if(in != null) {
                AudioInputStream stream = AudioSystem.getAudioInputStream(in);
                AudioFormat format = stream.getFormat();
                DataLine.Info info = new DataLine.Info(Clip.class, format);
                clip = (Clip) AudioSystem.getLine(info);
                clip.open(stream);
                clip.loop(0);
                do  {
                    try {
                        Thread.sleep(100);
                    } catch(InterruptedException iex) {
                        // bad form on my part here, should do something
                    }
                } while(clip.isRunning());
            }
        } catch (Exception e) {
            x.printStackTrace(System.out);
        } finally {
            try {
                if(clip != null) {
                    clip.close();
                }
            } catch(Exception x) {
                x.printStackTrace(System.out);
            }
        }
    }
}

Example of how to call it:

SoundThread.play("resources/cashregister6.wav");

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...