Question

我正在开发一个有音乐组件的程序。基本上当按下某些按钮时我想播放特定的歌曲文件。我一直在寻找在Java中播放声音的很多东西但是对我来说没有任何用处。我目前正在玩一些我在教程中找到的代码但是我不知道如何指定文件。我一直收到FileNotFoundExecption，所以我显然错误地引用了该文件。我的桌面上有.wav文件，我也在项目的资源源文件夹中。下面是代码的一部分，关于我如何引用文件的任何想法？

    public static void main(String[] args) throws Exception {

    // specify the sound to play
    // (assuming the sound can be played by the audio system)
    File soundFile = new File("/desktop/14_Wonderland.wav");
    AudioInputStream sound = AudioSystem.getAudioInputStream(soundFile);

    // load the sound into memory (a Clip)
    DataLine.Info info = new DataLine.Info(Clip.class, sound.getFormat());
    Clip clip = (Clip) AudioSystem.getLine(info);
    clip.open(sound);

    // due to bug in Java Sound, explicitly exit the VM when
    // the sound has stopped.
    clip.addLineListener(new LineListener() {
        public void update(LineEvent event) {
            if (event.getType() == LineEvent.Type.STOP) {
                event.getLine().close();
                System.exit(0);
            }
        }
    });

    // play the sound clip
    clip.start();
}

Answer 1

如果由于某种原因您在查找文件时遇到问题，我知道这对大多数情况来说并不理想，但您可以尝试使用JFileChooser（我链接了一个示例）。

由此，您可以只使用找到的文件，也可以输出所选文件的位置，以便了解如何为文件路径建模。我希望这有帮助！

快乐的编码！如果您有任何问题，请发表评论。

Answer 2

如果您不想在播放声音时打开默认音乐应用，你可以这样做：对于Mac OS X：Desktop.open（FilePath）; 对于Windows：Runtime.exec（FilePath）;

Answer 3

我知道它没有回答你关于File异常的问题（其他人已经做过），但你可以使用这段代码播放声音（你可能需要稍微玩一下才能满足你的需求）：

import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;

public class PlaySound {
    private static boolean tryToInterruptSound = false;
    private static long mainTimeOut = 3000;
    private static long startTime = System.currentTimeMillis();

    public static synchronized Thread playSound(final File file) {

        Thread soundThread = new Thread() {
            @Override
            public void run() {
                try{
                    Clip clip = null;
                    AudioInputStream inputStream = null;
                    clip = AudioSystem.getClip();
                    inputStream = AudioSystem.getAudioInputStream(file);
                    AudioFormat format = inputStream.getFormat();
                    long audioFileLength = file.length();
                    int frameSize = format.getFrameSize();
                    float frameRate = format.getFrameRate();
                    long durationInMiliSeconds = 
                            (long) (((float)audioFileLength / (frameSize * frameRate)) * 1000);

                    clip.open(inputStream);
                    clip.start();
                    System.out.println("" + (System.currentTimeMillis() - startTime) + ": sound started playing!");
                    Thread.sleep(durationInMiliSeconds);
                    while (true) {
                        if (!clip.isActive()) {
                            System.out.println("" + (System.currentTimeMillis() - startTime) + ": sound got to it's end!");
                            break;
                        }
                        long fPos = (long)(clip.getMicrosecondPosition() / 1000);
                        long left = durationInMiliSeconds - fPos;
                        System.out.println("" + (System.currentTimeMillis() - startTime) + ": time left: " + left);
                        if (left > 0) Thread.sleep(left);
                    }
                    clip.stop();  
                    System.out.println("" + (System.currentTimeMillis() - startTime) + ": sound stoped");
                    clip.close();
                    inputStream.close();
                } catch (LineUnavailableException e) {
                    e.printStackTrace();
                } catch (UnsupportedAudioFileException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (InterruptedException e) {
                    System.out.println("" + (System.currentTimeMillis() - startTime) + ": sound interrupted while playing.");
                }
            }
        };
        soundThread.setDaemon(true);
        soundThread.start();
        return soundThread;
    }

    public static void main(String[] args) {
        Thread soundThread = playSound(new File("C:\\Booboo.wav"));
        System.out.println("" + (System.currentTimeMillis() - startTime) + ": playSound returned, keep running the code");
        try {   
            Thread.sleep(mainTimeOut );
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        if (tryToInterruptSound) {
            try {   
                soundThread.interrupt();
                Thread.sleep(1); 
                // Sleep in order to let the interruption handling end before
                // exiting the program (else the interruption could be handled
                // after the main thread ends!).
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        System.out.println("" + (System.currentTimeMillis() - startTime) + ": End of main thread; exiting program " + 
                (soundThread.isAlive() ? "killing the sound deamon thread" : ""));
    }
}

尝试使用绝对文件路径或类路径中的路径来解决FileNotFound异常。

用Java播放声音文件

3 个答案: