package test1;import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Hashtable;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.sound.midi.InvalidMidiDataException;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Sequence;
import javax.sound.midi.Sequencer;

public class Test5 implements Runnable{private Sequencer midi;private String[] names={"1.mid","2.mid","3.mid","4.mid","5.mid"};private int i;private Map<String,Sequence> map;public Test5(){initMap();new Thread(this).start();}private void initMap(){try {map = new Hashtable<String, Sequence>();midi = MidiSystem.getSequencer(false);midi.open();for (String s : names) {try {Sequence s1 = MidiSystem.getSequence(new File(s));map.put(s, s1);} catch (InvalidMidiDataException ex) {Logger.getLogger(Test5.class.getName()).log(Level.SEVERE, null, ex);} catch (IOException ex) {Logger.getLogger(Test5.class.getName()).log(Level.SEVERE, null, ex);}}} catch (MidiUnavailableException ex) {Logger.getLogger(Test5.class.getName()).log(Level.SEVERE, null, ex);}}private void createPlayer(String name){try {Sequence se=map.get(name);midi.setSequence(se);midi.start();}catch (InvalidMidiDataException ex) {Logger.getLogger(Test5.class.getName()).log(Level.SEVERE, null, ex);}}public void run(){while(true){try {System.out.println("换文件了."+(++i));String name=names[(int)(Math.random()*names.length)];createPlayer(name);Thread.sleep(10000);} catch (InterruptedException ex) {Logger.getLogger(Test5.class.getName()).log(Level.SEVERE, null, ex);}}}public static void main(String[] args) {new Test5();}
}