如何让用户选择一个音频文件并在Java中播放

Question

我希望能够制作一个GUI或控制台应用程序，用户单击按钮从他们的计算机(兼容格式)中选择音频文件并播放，由于我完全没有GUI经验，如果我能给出一个提示，如何实现暂停和播放按钮，以及音量滑动/拨号和停止按钮，那就太好了。我只知道我要导入java.io.*和sun.audio.*。

编辑我当前的代码是这样的:

import sun.audio.*; //import the sun.audio package
import java.awt.*;
import java.io.*;

public class Boombox extends Frame implements FilenameFilter {
/**
 * 
 */
private static final long serialVersionUID = 4914433234899026080L;
Button openButton = new Button("Open");  
Button playButton = new Button("Play");
Button loopButton = new Button("Loop");
Button stopButton = new Button("Stop");
Label filename = new Label("                   ");
File theFile = null;
@SuppressWarnings({ "restriction" })
AudioData theData = null;
InputStream nowPlaying = null;
@SuppressWarnings({ "deprecation" })
public Boombox() {
    super("Boombox");
    resize(300, 200);
    Panel north = new Panel();
    north.setLayout(new FlowLayout(FlowLayout.LEFT));
    north.add(new Label("File: "));
    north.add("North", filename);
    add("North", north);
    Panel south = new Panel();
    south.add(openButton);
    south.add(playButton);
    south.add(loopButton);
    south.add(stopButton);
    add("South", south);
}
@SuppressWarnings("deprecation")
public static void main(String[] args) {
    Boombox sp = new Boombox();
    sp.show();
}
@SuppressWarnings({ "deprecation", "restriction" })
public void open() {
    FileDialog fd = new FileDialog(this, "Please select a .au file:");
    fd.setFilenameFilter(this);
    fd.show();
    try {
        theFile = new File(fd.getDirectory() + "/" + fd.getFile());
        if (theFile != null) {
            filename.setText(theFile.getName());
            FileInputStream fis = new FileInputStream(theFile);
            AudioStream as = new AudioStream(fis);
            theData = as.getData();
        }
    }
    catch (IOException e) {
        System.err.println(e);
    }
}
@SuppressWarnings("restriction")
public void play() {
    stop();    
    if (theData == null) open();
    if (theData != null) {
        AudioDataStream ads = new AudioDataStream(theData);
        AudioPlayer.player.start(ads);
        nowPlaying = ads;
    }
}
@SuppressWarnings("restriction")
public void stop() {
    if (nowPlaying != null) {
        AudioPlayer.player.stop(nowPlaying);
        nowPlaying = null;
    }
}
@SuppressWarnings("restriction")
public void loop() {
    stop();
    if (theData == null) open();
    if (theData != null) {
        ContinuousAudioDataStream cads = new ContinuousAudioDataStream(theData);
        AudioPlayer.player.start(cads);
        nowPlaying = cads;
    }
}
public boolean action(Event e, Object what) {
    if (e.target == playButton) {
        play();
        return true;
    }
    else if (e.target == openButton) {
        open();
        return true;
    }
    else if (e.target == loopButton) {
        loop();
        return true;
    }
    else if (e.target == stopButton) {
        stop();
        return true;
    }
    return false;
}
public boolean accept(File dir, String name) {
    name = name.toLowerCase();
    if (name.endsWith(".au")) return true;
    if (name.endsWith(".wav")) return true;
    return false;
}
}

Answer 1

这是一个播放短片的简单方法。

import javax.sound.sampled.*;
import java.net.URL;
import javax.swing.JOptionPane;
class ClipTest {
  public static void main(String[] args) throws Exception {
    String clipName = null;
    if (args.length==1) {
      clipName = args[0];
    } else {
      clipName = "http://pscode.org/media/leftright.wav";
    }
    System.out.println("Looping '" + clipName + "'.");
    URL url = new URL(clipName);
    AudioInputStream ais = AudioSystem.getAudioInputStream(url);
    Clip clip = AudioSystem.getClip();
    clip.open( ais );
    clip.loop(2);
    clip.start();
    JOptionPane.showMessageDialog(null, "Close to end..");
  }
}

输入/输出示例。

F:proj>java ClipTest http://pscode.org/media/100_2817-linear.wav
Looping 'http://pscode.org/media/100_2817-linear.wav'.
F:proj>java ClipTest
Looping 'http://pscode.org/media/leftright.wav'.
F:proj>

Answer 2

这个java使用sun类:

import sun.audio.*; //import the sun.audio package
import java.awt.*;
import java.io.*;

public class SoundPlayer extends Frame implements FilenameFilter {
  Button openButton = new Button("Open");  
  Button playButton = new Button("Play");
  Button loopButton = new Button("Loop");
  Button stopButton = new Button("Stop");
  Label filename = new Label("                   ");
  File theFile = null;
  AudioData theData = null;
  InputStream nowPlaying = null;
  public SoundPlayer() {
    super("Sound Player");
    resize(300, 200);
    Panel north = new Panel();
    north.setLayout(new FlowLayout(FlowLayout.LEFT));
    north.add(new Label("File: "));
    north.add("North", filename);
    add("North", north);
    Panel south = new Panel();
    south.add(openButton);
    south.add(playButton);
    south.add(loopButton);
    south.add(stopButton);
    add("South", south);
  }
  public static void main(String[] args) {
    SoundPlayer sp = new SoundPlayer();
    sp.show();
  }
  public void open() {
    FileDialog fd = new FileDialog(this, "Please select a .au file:");
    fd.setFilenameFilter(this);
    fd.show();
    try {
      theFile = new File(fd.getDirectory() + "/" + fd.getFile());
      if (theFile != null) {
        filename.setText(theFile.getName());
        FileInputStream fis = new FileInputStream(theFile);
        AudioStream as = new AudioStream(fis);
        theData = as.getData();
      }
    }
    catch (IOException e) {
      System.err.println(e);
    }
  }
  public void play() {
    stop();    
    if (theData == null) open();
    if (theData != null) {
      AudioDataStream ads = new AudioDataStream(theData);
      AudioPlayer.player.start(ads);
      nowPlaying = ads;
    }
  }
  public void stop() {
    if (nowPlaying != null) {
      AudioPlayer.player.stop(nowPlaying);
      nowPlaying = null;
    }
  }
  public void loop() {
    stop();
    if (theData == null) open();
    if (theData != null) {
      ContinuousAudioDataStream cads = new ContinuousAudioDataStream(theData);
      AudioPlayer.player.start(cads);
      nowPlaying = cads;
    }
  }
  public boolean action(Event e, Object what) {
    if (e.target == playButton) {
      play();
      return true;
    }
    else if (e.target == openButton) {
      open();
      return true;
    }
    else if (e.target == loopButton) {
      loop();
      return true;
    }
    else if (e.target == stopButton) {
      stop();
      return true;
    }
    return false;
  }
  public boolean accept(File dir, String name) {
    name = name.toLowerCase();
    if (name.endsWith(".au")) return true;
    if (name.endsWith(".wav")) return true;
    return false;
  }
}