如何在Java中的新线程中播放.MIDI文件？

我正在用Java改造游戏的一部分，我需要知道如何播放MIDI声音文件。 优选地，它不涉及导入任何外部库。 它也必须可以在新线程中运行，这样我就可以将各个声音叠加在背景歌曲上。

谢谢你的想法和时间。

Answer 1

此代码同时播放两个MIDI轨道（第一个对话框关闭后第二个序列开始）。 没有显式创建线程，但我想如果它们被包装在Thread对象中，它将工作得相同。

 import java.net.URL; import java.util.Locale; import javax.sound.midi.MidiDevice; import javax.sound.midi.MidiSystem; import javax.sound.midi.MidiUnavailableException; import javax.sound.midi.Receiver; import javax.sound.midi.Sequence; import javax.sound.midi.Sequencer; import javax.sound.midi.Transmitter; import javax.swing.JOptionPane; import org.apache.commons.lang.StringUtils; class PlayMidi { public static boolean useExternalSynth = false; public static void main(String[] args) throws Exception { MidiDevice receivingDevice = getReceivingDevice(); receivingDevice.open(); URL url1 = new URL("http://pscode.org/media/EverLove.mid"); Sequence sequence1 = MidiSystem.getSequence(url1); Sequencer sequencer1 = MidiSystem.getSequencer(false); Transmitter tx1 = sequencer1.getTransmitter(); Receiver rx1 = receivingDevice.getReceiver(); tx1.setReceiver(rx1); sequencer1.open(); sequencer1.setSequence(sequence1); URL url2 = new URL("http://pscode.org/media/AftrMdnt.mid"); Sequence sequence2 = MidiSystem.getSequence(url2); Sequencer sequencer2 = MidiSystem.getSequencer(false); Transmitter tx2 = sequencer2.getTransmitter(); Receiver rx2 = receivingDevice.getReceiver(); tx2.setReceiver(rx2); sequencer2.open(); sequencer2.setSequence(sequence2); sequencer1.start(); JOptionPane.showMessageDialog(null, "Everlasting Love"); sequencer2.start(); JOptionPane.showMessageDialog(null, "After Midnight"); } private static MidiDevice getReceivingDevice() throws MidiUnavailableException { for (MidiDevice.Info mdi: MidiSystem.getMidiDeviceInfo()) { MidiDevice dev = MidiSystem.getMidiDevice(mdi); if (dev.getMaxReceivers() != 0) { String lcName = StringUtils.defaultString(mdi.getName()) .toLowerCase(Locale.ENGLISH); if (lcName.contains(useExternalSynth? "usb": "java")) { return dev; } } } return null; } }