StdAudio.java 文件源码

/**
 * Plays an audio file (in .wav, .mid, or .au format) in a background
 * thread.
 *
 * @param filename
 *            the name of the audio file
 * @throws IllegalArgumentException
 *             if unable to play {@code filename}
 * @throws IllegalArgumentException
 *             if {@code filename} is {@code null}
 */
public static synchronized void play(final String filename) {
    if (filename == null)
        throw new IllegalArgumentException();

    InputStream is = StdAudio.class.getResourceAsStream(filename);
    if (is == null) {
        throw new IllegalArgumentException("could not read '" + filename + "'");
    }

    // code adapted from:
    // http://stackoverflow.com/questions/26305/how-can-i-play-sound-in-java
    try {
        // check if file format is supported
        // (if not, will throw an UnsupportedAudioFileException)
        @SuppressWarnings("unused")
        AudioInputStream ais = AudioSystem.getAudioInputStream(is);

        new Thread(new Runnable() {
            @Override
            public void run() {
                stream(filename);
            }
        }).start();
    }

    // let's try Applet.newAudioClip() instead
    catch (UnsupportedAudioFileException e) {
        playApplet(filename);
        return;
    }

    // something else went wrong
    catch (IOException ioe) {
        throw new IllegalArgumentException("could not play '" + filename + "'", ioe);
    }

}