如何在Java应用程序中播放音频 [英] How to play audio in Java Application

问题描述

我在做一个Java应用程序，我需要播放音频。我打主要是小的声音文件我的大炮发射的（它的大炮射击游戏）和炮弹爆炸，虽然我计划有循环背景音乐。我已经发现了两个不同的方法来做到这一点，但两者不工作我多么希望。

I'm making a java application and I need to play audio. I'm playing mainly small sound files of my cannon firing (its a cannon shooting game) and the projectiles exploding, though I plan on having looping background music. I have found two different methods to accomplish this, but both don't work how I want.

第一种方法是字面上的方法：

The first method is literally a method:

        public void playSoundFile(File file) {//http://java.ittoolbox.com/groups/technical-functional/java-l/sound-in-an-application-90681

        try {
//get an AudioInputStream
            AudioInputStream ais = AudioSystem.getAudioInputStream(file);
//get the AudioFormat for the AudioInputStream
            AudioFormat audioformat = ais.getFormat();
            System.out.println("Format: " + audioformat.toString());
            System.out.println("Encoding: " + audioformat.getEncoding());
            System.out.println("SampleRate:" + audioformat.getSampleRate());
            System.out.println("SampleSizeInBits: " + audioformat.getSampleSizeInBits());
            System.out.println("Channels: " + audioformat.getChannels());
            System.out.println("FrameSize: " + audioformat.getFrameSize());
            System.out.println("FrameRate: " + audioformat.getFrameRate());
            System.out.println("BigEndian: " + audioformat.isBigEndian());
//ULAW format to PCM format conversion
            if ((audioformat.getEncoding() == AudioFormat.Encoding.ULAW)
                    || (audioformat.getEncoding() == AudioFormat.Encoding.ALAW)) {
                AudioFormat newformat = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED,
                        audioformat.getSampleRate(),
                        audioformat.getSampleSizeInBits() * 2,
                        audioformat.getChannels(),
                        audioformat.getFrameSize() * 2,
                        audioformat.getFrameRate(), true);
                ais = AudioSystem.getAudioInputStream(newformat, ais);
                audioformat = newformat;
            }

//checking for a supported output line
            DataLine.Info datalineinfo = new DataLine.Info(SourceDataLine.class, audioformat);
            if (!AudioSystem.isLineSupported(datalineinfo)) {
                //System.out.println("Line matching " + datalineinfo + " is not supported.");
            } else {
                //System.out.println("Line matching " + datalineinfo + " is supported.");
//opening the sound output line
                SourceDataLine sourcedataline = (SourceDataLine) AudioSystem.getLine(datalineinfo);
                sourcedataline.open(audioformat);
                sourcedataline.start();
//Copy data from the input stream to the output data line
                int framesizeinbytes = audioformat.getFrameSize();
                int bufferlengthinframes = sourcedataline.getBufferSize() / 8;
                int bufferlengthinbytes = bufferlengthinframes * framesizeinbytes;
                byte[] sounddata = new byte[bufferlengthinbytes];
                int numberofbytesread = 0;
                while ((numberofbytesread = ais.read(sounddata)) != -1) {
                    int numberofbytesremaining = numberofbytesread;
                    sourcedataline.write(sounddata, 0, numberofbytesread);
                }
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

这样做的问题是，我的整个程序停止，直到声音文件完成，或者至少是接近尾声了。

The problem with this is that my entire program stops until the sound file is finished, or at least nearly finished.

第二种方法是这样的：

    File file = new File("Launch1.wav");
    AudioClip clip;
    try {
        clip = JApplet.newAudioClip(file.toURL());
        clip.play();
    } catch (Exception e) {
        e.getMessage();
    }

我这里的问题是，每次声音文件提前结束或不玩都取决于我在哪里放置code。

The problem I have here is that every time the sound file ends early or doesn't play at all depending on where I place the code.

时他们没有办法播放声音没有上述问题？难道我做错了什么？任何帮助是极大的AP preciated。

Is their any way to play sound without the above mentioned problems? Am I doing something wrong? Any help is greatly appreciated.

推荐答案

有关你必须创建另一个线程音频第一种方法。

For the first method you have to create another thread for audio.

例如这样的：

new Thread(
            new Runnable() {
                public void run() {
                    try {
                        // PLAY AUDIO CODE
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }).start();

当然，你必须确保previous声音不还在打。

Of course you have to make sure that previous sound isn't still playing.

这篇关于如何在Java应用程序中播放音频的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！